Why you should use BI -ontwikkelaarstest?

The BI -ontwikkelaarstest makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects: Verbinding maken met gegevensbronnen in Power BI Gegevens ruzie en transformaties in Power BI Dax -formules Verbinding maken met gegevens uit meerdere bronnen Dashboards en acties maken in Tableau Beheer van Tableau -werkbladen en werkboeken Tableau -gegevens filteren en analyseren Vectoren en dataframes in r Stringmanipulatie in r Analytics met r

BI -ontwikkelaarstest

About the test:

De Business Intelligence Developer Test gebruikt scenario-gebaseerde meerkeuzevragen om de kennis en vaardigheden van een kandidaat te evalueren met betrekking tot datamodellering en ETL-processen, datawarehousing en datamining, BI-rapportage en visualisatie, data-analyse en voorspellende modellering en BI-projectmanagement. Kandidaten worden ook geëvalueerd op hun vermogen om BI -tools en technologieën te gebruiken, zoals SQL Server, Power BI, Tableau en andere gerelateerde tools, en hun vaardigheid bij het toepassen van gegevensanalyse en business intelligence -technieken om complexe zakelijke problemen op te lossen.

Covered skills:

Verbinding maken met gegevensbronnen in Power BI
Dax -formules
Dashboards en acties maken in Tableau
Tableau -gegevens filteren en analyseren
Stringmanipulatie in r
Python Syntax
SQL CRUD -operaties
Python -programmering

Gegevens ruzie en transformaties in Power BI
Verbinding maken met gegevens uit meerdere bronnen
Beheer van Tableau -werkbladen en werkboeken
Vectoren en dataframes in r
Analytics met r
Python oeps
SQL sluit zich aan en indexeert

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9 reasons why

Adaface BI -ontwikkelaars Test is the most accurate way to shortlist BI -ontwikkelaars

Reason #1

Tests for on-the-job skills

The BI -ontwikkelaarstest helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

Verbinding maken met gegevensbronnen in Power BI
Gegevens uitvoerende ruzie en transformaties in Power BI
Gebruikmakend van DAX -formules in Power BI
Verbinding maken met gegevens uit meerdere bronnen
Interactieve dashboards en acties in Tableau maken
Beheer van Tableau -werkbladen en werkboeken
Gegevens filteren en analyseren in Tableau
Werken met vectoren en dataframes in r
Het manipuleren van snaren in r
Analytics uitvoeren met r
Python -syntaxis begrijpen
Python oeps concepten implementeren
SQL CRUD -bewerkingen uitvoeren
SQL beheersen Joins en Indexes
Het aantonen van vaardigheid in Python -programmering

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface

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Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

Dit zijn slechts een klein monster uit onze bibliotheek met meer dan 10.000 vragen. De werkelijke vragen hierover BI -ontwikkelaarstest zal niet-googelbaar zijn.

🧐 Question
Medium Data Filtering Report Development M Language Data Visualization	Solve
You are creating a Power BI report where users need to dynamically filter data based on a range of dates. The report has a Sales table with columns Date, ProductID, and Amount. You decide to use a Power Query parameter to allow users to select a start and end date, which will then filter the Sales table accordingly. The parameter is named DateRange and has a type of List. You need to write a Power Query M formula to filter the Sales table based on the selected date range. The DateRange parameter contains two dates: the first item is the start date, and the second item is the end date. How should the M formula be structured to achieve this functionality? A: Table.SelectRows(Sales, each [Date] >= DateRange{0} and [Date] <= DateRange{1}) B: Sales{[Date] >= DateRange{0}, [Date] <= DateRange{1}} C: Table.FilterRows(Sales, each [Date] >= List.First(DateRange) and [Date] <= List.Last(DateRange)) D: Table.SelectRows(Sales, each [Date] >= List.First(DateRange) and [Date] <= List.Last(DateRange)) E: Filter.Table(Sales, [Date] >= DateRange{0}, [Date] <= DateRange{1})
Medium Many-to-one error Data Modeling	Solve
Consider the following two tables in Power BI: We received the following error when we tried to set many-to-one cardinality between devices to users tables: “The cardinality you selected isn’t valid for this relationship”. What should we do before creating the many-to-one relationship?
Medium Power Query Functions Power Query	Solve
Review the following Microsoft SQL Server table: Complete the following Power Query formula used to create a custom column to replace the numbers present in last 11 characters of ISBN with 11 ‘’. Example ‘978-0-365-51051-4’ is converted to ‘978-0--**-’ A: Text.Insert B: Text.Replace C: Text.Start D: Text.End
Medium Calculated Properties Data Analysis	Solve
Here’s sample data imported into Tableau: Assume only three rows of data is present in the source. Once the data is imported, we added to new calculated fields: Measure 1 with the formula: SUM([Profit])/SUM([Sales]) Measure 2 with the formula: SUM([Profit]/[Sales]) If we dragged Profit, Sales, Measure 1 and Measure 2 in the viewer as shown here: Pick the correct statements regarding columns Measure 1, Measure 2 and the row Grand total: A: Values of Measure 1 would be 0.08, 0.075 and 0.1 B: Values of Measure 2 would be 0.08, 0.075 and 0.1 C: Values of Measure 1 would be 0.08, 0.769 and 0.08 D: Values of Measure 2 would be 0.08, 0.769 and 0.08 E: Values of Measure 1 would be 0.08, 0.155 and 0.255 F: Values of Measure 2 would be 0.08, 0.155 and 0.255 G: Grand total of Measure 1 would be 0.08 H: Grand total of Measure 2 would be 0.08 I: Grand total of Measure 1 would be 0.255 J: Grand total of Measure 2 would be 0.255
Medium Change display icon	Solve
What steps would you take to change the following view so that Office Supplies is represented by a different symbol? A: Click on shapes in the marks area. Then select Office Supplies and the icon of choice and click okay. B: Right-click on product category, select default properties, and select shape. Then select Office Supplies and the icon of choice and click okay. C: Right click on the square and select "change shape" from the popup menu. Select the icon of choice and click okay. D: A, B or C E: None of these would work
Easy Pie Chart Data Analysis Charts	Solve
We have the following dataset in Tableau: Which of the following Marks settings will result in following Pie chart? A: Drag Name to Color B: Drag Share to Color C: Drag Name to Label D: Drag Share to Label E: Drag Name to Angle F: Drag Share to Angle G: Drag Name to Detail
Medium Applying Functions Data frames Functions Math	Solve
Consider the following R code: This script defines a function apply_fun that calculates the mean of a vector and adds it to the standard deviation of the vector. The apply function is then used to apply this function to each column of the data frame df. What will be the value of result after the script is run?
Medium Dataframe Transform	Solve
Review the following Dataframe 'bazinga': Which of the following commands would turn it into the Dataframe shown below:
Medium Matrix Manipulation Matrices Lists	Solve
Consider the following pseudo code: What will be the state of list_of_matrices after running the script?
Medium ZeroDivisionError and IndexError Exceptions	Solve
What will the following Python code output?
Medium Session File Handling Dictionary	Solve
The function high_sess should compute the highest number of events per session of each user in the database by reading a comma-separated value input file of session data. The result should be returned from the function as a dictionary. The first column of each line in the input file is expected to contain the user’s name represented as a string. The second column is expected to contain an integer representing the events in a session. Here is an example input file: Tony,10 Stark,12 Black,25 Your program should ignore a non-conforming line like this one. Stark,3 Widow,6 Widow,14 The resulting return value for this file should be the following dictionary: { 'Stark':12, 'Black':25, 'Tony':10, 'Widow':14 } What should replace the CODE TO FILL line to complete the function?
Medium Max Code Arrays	Solve
Below are code lines to create a Python function. Ignoring indentation, what lines should be used and in what order for the following function to be complete:
Medium Recursive Function Recursion Dictionary Lists	Solve
Consider the following Python code: In the above code, recursive_search is a function that takes a dictionary (data) and a target key (target) as arguments. It searches for the target key within the dictionary, which could potentially have nested dictionaries and lists as values, and returns the value associated with the target key. If the target key is not found, it returns None. nested_dict is a dictionary that contains multiple levels of nested dictionaries and lists. The recursive_search function is then called with nested_dict as the data and 'target_key' as the target. What will the output be after executing the above code?
Medium Stacking problem Stack Linkedlist	Solve
What does the below function ‘fun’ does? A: Sum of digits of the number passed to fun. B: Number of digits of the number passed to fun. C: 0 if the number passed to fun is divisible by 10. 1 otherwise. D: Sum of all digits number passed to fun except for the last digit.
Medium Multi Select JOIN GROUP BY	Solve
Consider the following SQL table: How many rows does the following SQL query return?
Medium nth highest sales Nested queries User Defined Functions	Solve
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
Medium Select & IN Nested queries	Solve
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
Medium Sorting Ubers Nested queries Join Comparison operators	Solve
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
Hard With, AVG & SUM MAX() MIN() Aggregate functions	Solve
Consider the following SQL table: How many tuples does the following query return?
Easy Registration Queue Logic Queues	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
Medium Visitors Count Strings Logic	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill
	Medium Data Filtering Report Development M Language Data Visualization	2 mins Power BI	Solve
You are creating a Power BI report where users need to dynamically filter data based on a range of dates. The report has a Sales table with columns Date, ProductID, and Amount. You decide to use a Power Query parameter to allow users to select a start and end date, which will then filter the Sales table accordingly. The parameter is named DateRange and has a type of List. You need to write a Power Query M formula to filter the Sales table based on the selected date range. The DateRange parameter contains two dates: the first item is the start date, and the second item is the end date. How should the M formula be structured to achieve this functionality? A: Table.SelectRows(Sales, each [Date] >= DateRange{0} and [Date] <= DateRange{1}) B: Sales{[Date] >= DateRange{0}, [Date] <= DateRange{1}} C: Table.FilterRows(Sales, each [Date] >= List.First(DateRange) and [Date] <= List.Last(DateRange)) D: Table.SelectRows(Sales, each [Date] >= List.First(DateRange) and [Date] <= List.Last(DateRange)) E: Filter.Table(Sales, [Date] >= DateRange{0}, [Date] <= DateRange{1})
	Medium Many-to-one error Data Modeling	2 mins Power BI	Solve
Consider the following two tables in Power BI: We received the following error when we tried to set many-to-one cardinality between devices to users tables: “The cardinality you selected isn’t valid for this relationship”. What should we do before creating the many-to-one relationship?
	Medium Power Query Functions Power Query	2 mins Power BI	Solve
Review the following Microsoft SQL Server table: Complete the following Power Query formula used to create a custom column to replace the numbers present in last 11 characters of ISBN with 11 ‘’. Example ‘978-0-365-51051-4’ is converted to ‘978-0--**-’ A: Text.Insert B: Text.Replace C: Text.Start D: Text.End
	Medium Calculated Properties Data Analysis	3 mins Tableau	Solve
Here’s sample data imported into Tableau: Assume only three rows of data is present in the source. Once the data is imported, we added to new calculated fields: Measure 1 with the formula: SUM([Profit])/SUM([Sales]) Measure 2 with the formula: SUM([Profit]/[Sales]) If we dragged Profit, Sales, Measure 1 and Measure 2 in the viewer as shown here: Pick the correct statements regarding columns Measure 1, Measure 2 and the row Grand total: A: Values of Measure 1 would be 0.08, 0.075 and 0.1 B: Values of Measure 2 would be 0.08, 0.075 and 0.1 C: Values of Measure 1 would be 0.08, 0.769 and 0.08 D: Values of Measure 2 would be 0.08, 0.769 and 0.08 E: Values of Measure 1 would be 0.08, 0.155 and 0.255 F: Values of Measure 2 would be 0.08, 0.155 and 0.255 G: Grand total of Measure 1 would be 0.08 H: Grand total of Measure 2 would be 0.08 I: Grand total of Measure 1 would be 0.255 J: Grand total of Measure 2 would be 0.255
	Medium Change display icon	2 mins Tableau	Solve
What steps would you take to change the following view so that Office Supplies is represented by a different symbol? A: Click on shapes in the marks area. Then select Office Supplies and the icon of choice and click okay. B: Right-click on product category, select default properties, and select shape. Then select Office Supplies and the icon of choice and click okay. C: Right click on the square and select "change shape" from the popup menu. Select the icon of choice and click okay. D: A, B or C E: None of these would work
	Easy Pie Chart Data Analysis Charts	3 mins Tableau	Solve
We have the following dataset in Tableau: Which of the following Marks settings will result in following Pie chart? A: Drag Name to Color B: Drag Share to Color C: Drag Name to Label D: Drag Share to Label E: Drag Name to Angle F: Drag Share to Angle G: Drag Name to Detail
	Medium Applying Functions Data frames Functions Math	3 mins R	Solve
Consider the following R code: This script defines a function apply_fun that calculates the mean of a vector and adds it to the standard deviation of the vector. The apply function is then used to apply this function to each column of the data frame df. What will be the value of result after the script is run?
	Medium Dataframe Transform	3 mins R	Solve
Review the following Dataframe 'bazinga': Which of the following commands would turn it into the Dataframe shown below:
	Medium Matrix Manipulation Matrices Lists	3 mins R	Solve
Consider the following pseudo code: What will be the state of list_of_matrices after running the script?
	Medium ZeroDivisionError and IndexError Exceptions	2 mins Python	Solve
What will the following Python code output?
	Medium Session File Handling Dictionary	2 mins Python	Solve
The function high_sess should compute the highest number of events per session of each user in the database by reading a comma-separated value input file of session data. The result should be returned from the function as a dictionary. The first column of each line in the input file is expected to contain the user’s name represented as a string. The second column is expected to contain an integer representing the events in a session. Here is an example input file: Tony,10 Stark,12 Black,25 Your program should ignore a non-conforming line like this one. Stark,3 Widow,6 Widow,14 The resulting return value for this file should be the following dictionary: { 'Stark':12, 'Black':25, 'Tony':10, 'Widow':14 } What should replace the CODE TO FILL line to complete the function?
	Medium Max Code Arrays	2 mins Python	Solve
Below are code lines to create a Python function. Ignoring indentation, what lines should be used and in what order for the following function to be complete:
	Medium Recursive Function Recursion Dictionary Lists	3 mins Python	Solve
Consider the following Python code: In the above code, recursive_search is a function that takes a dictionary (data) and a target key (target) as arguments. It searches for the target key within the dictionary, which could potentially have nested dictionaries and lists as values, and returns the value associated with the target key. If the target key is not found, it returns None. nested_dict is a dictionary that contains multiple levels of nested dictionaries and lists. The recursive_search function is then called with nested_dict as the data and 'target_key' as the target. What will the output be after executing the above code?
	Medium Stacking problem Stack Linkedlist	4 mins Python	Solve
What does the below function ‘fun’ does? A: Sum of digits of the number passed to fun. B: Number of digits of the number passed to fun. C: 0 if the number passed to fun is divisible by 10. 1 otherwise. D: Sum of all digits number passed to fun except for the last digit.
	Medium Multi Select JOIN GROUP BY	2 mins SQL	Solve
Consider the following SQL table: How many rows does the following SQL query return?
	Medium nth highest sales Nested queries User Defined Functions	3 mins SQL	Solve
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Medium Select & IN Nested queries	3 mins SQL	Solve
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Medium Sorting Ubers Nested queries Join Comparison operators	3 mins SQL	Solve
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	Hard With, AVG & SUM MAX() MIN() Aggregate functions	2 mins SQL	Solve
Consider the following SQL table: How many tuples does the following query return?
	Easy Registration Queue Logic Queues	30 mins Coding	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Medium Visitors Count Strings Logic	30 mins Coding	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Data Filtering Report Development M Language Data Visualization	Power BI	Medium	2 mins	Solve
You are creating a Power BI report where users need to dynamically filter data based on a range of dates. The report has a Sales table with columns Date, ProductID, and Amount. You decide to use a Power Query parameter to allow users to select a start and end date, which will then filter the Sales table accordingly. The parameter is named DateRange and has a type of List. You need to write a Power Query M formula to filter the Sales table based on the selected date range. The DateRange parameter contains two dates: the first item is the start date, and the second item is the end date. How should the M formula be structured to achieve this functionality? A: Table.SelectRows(Sales, each [Date] >= DateRange{0} and [Date] <= DateRange{1}) B: Sales{[Date] >= DateRange{0}, [Date] <= DateRange{1}} C: Table.FilterRows(Sales, each [Date] >= List.First(DateRange) and [Date] <= List.Last(DateRange)) D: Table.SelectRows(Sales, each [Date] >= List.First(DateRange) and [Date] <= List.Last(DateRange)) E: Filter.Table(Sales, [Date] >= DateRange{0}, [Date] <= DateRange{1})
	Many-to-one error Data Modeling	Power BI	Medium	2 mins	Solve
Consider the following two tables in Power BI: We received the following error when we tried to set many-to-one cardinality between devices to users tables: “The cardinality you selected isn’t valid for this relationship”. What should we do before creating the many-to-one relationship?
	Power Query Functions Power Query	Power BI	Medium	2 mins	Solve
Review the following Microsoft SQL Server table: Complete the following Power Query formula used to create a custom column to replace the numbers present in last 11 characters of ISBN with 11 ‘’. Example ‘978-0-365-51051-4’ is converted to ‘978-0--**-’ A: Text.Insert B: Text.Replace C: Text.Start D: Text.End
	Calculated Properties Data Analysis	Tableau	Medium	3 mins	Solve
Here’s sample data imported into Tableau: Assume only three rows of data is present in the source. Once the data is imported, we added to new calculated fields: Measure 1 with the formula: SUM([Profit])/SUM([Sales]) Measure 2 with the formula: SUM([Profit]/[Sales]) If we dragged Profit, Sales, Measure 1 and Measure 2 in the viewer as shown here: Pick the correct statements regarding columns Measure 1, Measure 2 and the row Grand total: A: Values of Measure 1 would be 0.08, 0.075 and 0.1 B: Values of Measure 2 would be 0.08, 0.075 and 0.1 C: Values of Measure 1 would be 0.08, 0.769 and 0.08 D: Values of Measure 2 would be 0.08, 0.769 and 0.08 E: Values of Measure 1 would be 0.08, 0.155 and 0.255 F: Values of Measure 2 would be 0.08, 0.155 and 0.255 G: Grand total of Measure 1 would be 0.08 H: Grand total of Measure 2 would be 0.08 I: Grand total of Measure 1 would be 0.255 J: Grand total of Measure 2 would be 0.255
	Change display icon	Tableau	Medium	2 mins	Solve
What steps would you take to change the following view so that Office Supplies is represented by a different symbol? A: Click on shapes in the marks area. Then select Office Supplies and the icon of choice and click okay. B: Right-click on product category, select default properties, and select shape. Then select Office Supplies and the icon of choice and click okay. C: Right click on the square and select "change shape" from the popup menu. Select the icon of choice and click okay. D: A, B or C E: None of these would work
	Pie Chart Data Analysis Charts	Tableau	Easy	3 mins	Solve
We have the following dataset in Tableau: Which of the following Marks settings will result in following Pie chart? A: Drag Name to Color B: Drag Share to Color C: Drag Name to Label D: Drag Share to Label E: Drag Name to Angle F: Drag Share to Angle G: Drag Name to Detail
	Applying Functions Data frames Functions Math	R	Medium	3 mins	Solve
Consider the following R code: This script defines a function apply_fun that calculates the mean of a vector and adds it to the standard deviation of the vector. The apply function is then used to apply this function to each column of the data frame df. What will be the value of result after the script is run?
	Dataframe Transform	R	Medium	3 mins	Solve
Review the following Dataframe 'bazinga': Which of the following commands would turn it into the Dataframe shown below:
	Matrix Manipulation Matrices Lists	R	Medium	3 mins	Solve
Consider the following pseudo code: What will be the state of list_of_matrices after running the script?
	ZeroDivisionError and IndexError Exceptions	Python	Medium	2 mins	Solve
What will the following Python code output?
	Session File Handling Dictionary	Python	Medium	2 mins	Solve
The function high_sess should compute the highest number of events per session of each user in the database by reading a comma-separated value input file of session data. The result should be returned from the function as a dictionary. The first column of each line in the input file is expected to contain the user’s name represented as a string. The second column is expected to contain an integer representing the events in a session. Here is an example input file: Tony,10 Stark,12 Black,25 Your program should ignore a non-conforming line like this one. Stark,3 Widow,6 Widow,14 The resulting return value for this file should be the following dictionary: { 'Stark':12, 'Black':25, 'Tony':10, 'Widow':14 } What should replace the CODE TO FILL line to complete the function?
	Max Code Arrays	Python	Medium	2 mins	Solve
Below are code lines to create a Python function. Ignoring indentation, what lines should be used and in what order for the following function to be complete:
	Recursive Function Recursion Dictionary Lists	Python	Medium	3 mins	Solve
Consider the following Python code: In the above code, recursive_search is a function that takes a dictionary (data) and a target key (target) as arguments. It searches for the target key within the dictionary, which could potentially have nested dictionaries and lists as values, and returns the value associated with the target key. If the target key is not found, it returns None. nested_dict is a dictionary that contains multiple levels of nested dictionaries and lists. The recursive_search function is then called with nested_dict as the data and 'target_key' as the target. What will the output be after executing the above code?
	Stacking problem Stack Linkedlist	Python	Medium	4 mins	Solve
What does the below function ‘fun’ does? A: Sum of digits of the number passed to fun. B: Number of digits of the number passed to fun. C: 0 if the number passed to fun is divisible by 10. 1 otherwise. D: Sum of all digits number passed to fun except for the last digit.
	Multi Select JOIN GROUP BY	SQL	Medium	2 mins	Solve
Consider the following SQL table: How many rows does the following SQL query return?
	nth highest sales Nested queries User Defined Functions	SQL	Medium	3 mins	Solve
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Select & IN Nested queries	SQL	Medium	3 mins	Solve
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Sorting Ubers Nested queries Join Comparison operators	SQL	Medium	3 mins	Solve
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	With, AVG & SUM MAX() MIN() Aggregate functions	SQL	Hard	2 mins	Solve
Consider the following SQL table: How many tuples does the following query return?
	Registration Queue Logic Queues	Coding	Easy	30 mins	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Visitors Count Strings Logic	Coding	Medium	30 mins	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

Reason #4

1200+ customers in 75 countries

Met Adaface konden we ons eerste screeningproces met ruim 75% optimaliseren, waardoor kostbare tijd vrijkwam voor zowel de rekruteringsmanagers als ons talentacquisitieteam!

Brandon Lee, Hoofd Mensen, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment BI -ontwikkelaarstest in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the BI -ontwikkelaarstest from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

Reason #7

Detailed scorecards & benchmarks

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Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring

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About the BI -ontwikkelaars Assessment Test

Why you should use Pre-employment BI -ontwikkelaarstest?

The BI -ontwikkelaarstest makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

Verbinding maken met gegevensbronnen in Power BI
Gegevens ruzie en transformaties in Power BI
Dax -formules
Verbinding maken met gegevens uit meerdere bronnen
Dashboards en acties maken in Tableau
Beheer van Tableau -werkbladen en werkboeken
Tableau -gegevens filteren en analyseren
Vectoren en dataframes in r
Stringmanipulatie in r
Analytics met r

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the BI -ontwikkelaarstest?

Gegevens ruzies en transformaties in Power Bi
met deze vaardigheid , Kandidaten kunnen onbewerkte gegevens reinigen en transformeren om het geschikt te maken voor verdere analyse in Power BI. Ze kunnen taken uitvoeren, zoals het verwijderen van onnodige kolommen, het samenvoegen van gegevens en het maken van berekende kolommen. Deze vaardigheid is cruciaal om de nauwkeurigheid en kwaliteit van de gegevens te waarborgen die worden gebruikt in Power BI -rapporten en visualisaties.
Dax Formulas
Dax (data analyses expressies) is een formuletaal die in macht wordt gebruikt BI voor het maken van aangepaste berekeningen en aggregaties. Deze vaardigheid meet de vaardigheid van een kandidaat bij het schrijven van DAX -formules om berekeningen over gegevens uit te voeren, nieuwe maatregelen te maken en complexe berekeningen op te bouwen. Het is essentieel om deze vaardigheid in de test te evalueren om het vermogen van de kandidaat te beoordelen om gegevens effectief te manipuleren en te analyseren in Power Bi.
verbinden met gegevens uit meerdere bronnen
Deze vaardigheid evalueert een kandidaat Mogelijkheid om gegevens uit meerdere bronnen in te sluiten en te integreren in één visualisatietool, zoals Tableau. Het meet het vermogen van de kandidaat om gegevens uit verschillende databases of bestandsformaten te combineren en samen te voegen en collectief te analyseren. Deze vaardigheid is belangrijk om ervoor te zorgen dat de kandidaat kan werken met complexe gegevensscenario's en uitgebreide dashboards en rapporten in Tableau kan maken.
Dashboards en acties maken in Tableau
Deze vaardigheid beoordeelt de vaardigheid van een kandidaat in Tableau gebruiken om interactieve dashboards te ontwerpen waarmee gebruikers gegevens visueel kunnen verkennen en acties kunnen uitvoeren zoals filteren, sorteren en boren. Het evalueert het vermogen van de kandidaat om gegevens op een dwingende en gebruiksvriendelijke manier te presenteren, en biedt inzichtelijke visualisaties en betekenisvolle interacties.
Werkbladen voor Tableau beheren en werkboeken
Met deze vaardigheid kunnen kandidaten effectief, kandidaten, kandidaten, kandidaten, kunnen kandidaten effectief, kandidaten, kandidaten, kandidaten, kunnen kandidaten effectief, kandidaten, kandidaten, kandidaten, kunnen kandidaten effectief, kandidaten, kandidaten, kandidaten, kunnen kandidaten effectief Organiseer en beheer visualisaties in Tableau -werkbladen en werkboeken. Het meet het vermogen van de kandidaat om visualisaties te rangschikken en op te stellen, hiërarchieën te creëren en gegevensverbindingen te beheren. Deze vaardigheid is belangrijk omdat het ervoor zorgt dat de kandidaat efficiënt kan navigeren en tableau -projecten kan onderhouden, de productiviteit en samenwerking kan verbeteren.
filteren en analyseren van Tableau -gegevens
Deze vaardigheid evalueert het vermogen van een kandidaat om te filteren en Analyseer gegevens in Tableau met behulp van verschillende technieken zoals het toepassen van filters, het creëren van berekende velden en het uitvoeren van aggregaties. Het beoordeelt het vermogen van de kandidaat om zinvolle inzichten uit gegevens af te leiden en deze te presenteren door visualisaties. Deze vaardigheid is belangrijk om de analytische vaardigheden van de kandidaat en hun begrip van gegevensverkenning in Tableau te peilen.
vectoren en dataframes in R
Deze vaardigheid omvat het werken met vectoren en datadrames in R, die fundamentele gegevensstructuren zijn die worden gebruikt om gegevens op te slaan en te manipuleren. Vectoren zijn eendimensionale arrays, terwijl gegevensframes multidimensionale structuren zijn die verschillende soorten gegevens kunnen bevatten. Deze vaardigheid is essentieel in de test, omdat het het vermogen van een kandidaat meet om gegevensbewerkingen en analyse uit te voeren met behulp van deze belangrijke gegevensstructuren in r.
stringmanipulatie in R
Deze vaardigheid evalueert een kandidaat Mogelijkheden om snaren in R te manipuleren, zoals het extraheren van substrings, het vervangen van tekens of splitsingsklapen. Stringmanipulatie is belangrijk voor het reinigen van gegevens, tekstverwerking en taken voor technische engineering in R. Deze vaardigheid wordt beoordeeld in de test om de vaardigheid van de kandidaat te peilen bij het omgaan met en manipuleren van tekstuele gegevens met behulp van geschikte R -functies en technieken.
. Analytics met R
Deze vaardigheid meet het vermogen van een kandidaat om statistische en analytische technieken toe te passen met behulp van R. Het beoordeelt de kennis van de kandidaat van verschillende R -pakketten en functies voor gegevensanalyse, regressie, clustering en visualisatie. Analytics met R is een belangrijke vaardigheid om in een BI-ontwikkelaar te hebben, omdat het hen in staat stelt inzichten af te leiden, modellen te bouwen en gegevensgestuurde beslissingen te nemen met behulp van r.
Python Syntax
Deze vaardigheid evalueert het begrip van een kandidaat van de syntaxis en structuur van de Python -programmeertaal. Het beoordeelt hun kennis van variabelen, gegevenstypen, besturingsstroomverklaringen, lussen, functies en andere kernconcepten van Python. Python Syntax is een fundamentele vaardigheid om in de test te meten, omdat het de bouwstenen vormt van het schrijven van pythoncode voor gegevensmanipulatie, analyse en visualisatietaken.
python oops
Deze vaardigheid beoordeelt De vaardigheid van een kandidaat in objectgeoriënteerde programmering (OOP) met behulp van Python. Het evalueert hun kennis en vermogen om klassen, objecten, overerving, polymorfisme en inkapseling te definiëren en te gebruiken. Python OOPS is een belangrijke vaardigheid om in de test te meten, omdat het het begrip van de kandidaat aantoont van de principes van OOP en hun vermogen om modulaire en herbruikbare code te schrijven in Python.
SQL Crud Operations </h4> <P > Deze vaardigheid meet de vaardigheid van een kandidaat bij het uitvoeren van CRUD -bewerkingen (CREATE, LEZEN, UPDATE, UITDAKT, DELETE) in SQL, die fundamentele database -bewerkingen zijn. Het beoordeelt hun vermogen om gegevens uit relationele databases in te voegen, op te halen, op te halen en te verwijderen met behulp van SQL -query's. SQL CUD -bewerkingen zijn een essentiële vaardigheid om te evalueren in de test, omdat het het vermogen van de kandidaat aantoont om te communiceren met databases en gegevens te manipuleren met behulp van SQL. </p> <h4> SQL Joins and Indexes </H4> <p> Deze vaardigheid evalueert een Kandidaat's kennis en begrip van SQL -joins, die worden gebruikt om gegevens uit meerdere tabellen te combineren op basis van gemeenschappelijke kolommen. Het beoordeelt ook hun vaardigheid in het werken met indexen, die de prestaties van SQL -query's verbeteren. SQL JOINEN en indexen zijn belangrijke vaardigheden om te meten in de test, omdat ze het vermogen van de kandidaat aantonen om gegevens op te halen en te manipuleren uit complexe relationele databasestructuren. </p> <h4> python programmering
Deze vaardigheid beoordeelt een kandidaat Vaardigheid in programmeren met python, met betrekking tot onderwerpen zoals gegevensmanipulatie, analyse, visualisatie en automatisering. Het meet hun vermogen om Python -code te schrijven om bedrijfsproblemen op te lossen, taken voor gegevensverwerking af te handelen en applicaties te bouwen. Python -programmering is een cruciale vaardigheid om in de test te evalueren, omdat het het vermogen van de kandidaat weergeeft om de veelzijdigheid en kracht van Python te benutten in verschillende aspecten van BI -ontwikkeling.
Full list of covered topics
The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for BI -ontwikkelaarstest to be based on.
Power Bi
Data bronnen
Gegevens ruzie
Dax -formules
Verbinding maken met meerdere bronnen
Interactieve dashboards
Tableau -werkbladen
Tableau -werkboeken
Gegevens filteren
Gegevens analyseren
Vectoren
DataFrames
Stringmanipulatie
Analyse
Python Syntax
Python oeps
SQL CRUD -operaties
SQL voegt zich bij
SQL -indexen
Python -programmering

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What roles can I use the BI -ontwikkelaarstest for?

BI -ontwikkelaar
Data -analist
Data Engineer
Bedrijfsanalist
Database Administrator
Data Warehouse Manager
ETL -ontwikkelaar

How is the BI -ontwikkelaarstest customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

Python Syntax
Python oeps
SQL CRUD -operaties
SQL sluit zich aan en indexeert
Python -programmering
Geavanceerde gegevensmodellering in Power BI
Werken met complexe datavisualisaties in Tableau
Geavanceerde analyses met r
Gegevensreiniging en voorbewerking in Python
Geavanceerde SQL -query's en optimalisatie

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

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De rekruteringsmanagers waren van mening dat ze door de technische vragen die ze tijdens de panelgesprekken stelden, konden zien welke kandidaten beter scoorden, en onderscheidden ze zich met degenen die niet zo goed scoorden. Zij zijn zeer tevreden met de kwaliteit van de kandidaten op de shortlist van de Adaface-screening.

85%

Vermindering van de screeningstijd

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BI -ontwikkelaars Online Test Veelgestelde vragen

Kan ik meerdere vaardigheden combineren in één aangepaste beoordeling?

Ja absoluut. Aangepaste beoordelingen zijn opgezet op basis van uw functiebeschrijving en bevatten vragen over alle must-have vaardigheden die u opgeeft.

Heeft u functies tegen latere of proctoring op hun plaats?

We hebben de volgende anti-cheating-functies op zijn plaats:

Niet-googelbare vragen
IP Proctoring
Web Proctoring
Webcam Proctoring
Plagiaatdetectie
Beveilig browser

Lees meer over de Proctoring -functies.

Hoe interpreteer ik testscores?

Het belangrijkste om in gedachten te houden is dat een beoordeling een eliminatietool is, geen selectietool. Een vaardighedenbeoordeling is geoptimaliseerd om u te helpen kandidaten te elimineren die niet technisch gekwalificeerd zijn voor de rol, het is niet geoptimaliseerd om u te helpen de beste kandidaat voor de rol te vinden. Dus de ideale manier om een beoordeling te gebruiken is om een drempelscore te bepalen (meestal 55%, wij helpen u benchmark) en alle kandidaten uit te nodigen die boven de drempel scoren voor de volgende interviewrondes.

Voor welk ervaringsniveau kan ik deze test gebruiken?

Elke ADAFACE -beoordeling is aangepast aan uw functiebeschrijving/ ideale kandidaatpersonage (onze experts van het onderwerp zullen de juiste vragen kiezen voor uw beoordeling uit onze bibliotheek van 10000+ vragen). Deze beoordeling kan worden aangepast voor elk ervaringsniveau.

Krijgt elke kandidaat dezelfde vragen?

Ja, het maakt het veel gemakkelijker voor u om kandidaten te vergelijken. Opties voor MCQ -vragen en de volgorde van vragen worden gerandomiseerd. We hebben anti-cheating/proctoring functies. In ons bedrijfsplan hebben we ook de optie om meerdere versies van dezelfde beoordeling te maken met vragen over vergelijkbare moeilijkheidsniveaus.