Test dla programisty BI

Q: What topics are covered in the Test dla programisty BI?

Łączenie ze źródłami danych w Power BI Wręczenie danych i transformacje w Power BI Formuły Dax Łączenie z danymi z wielu źródeł Tworzenie pulpitów nawigacyjnych i działań w Tableau Zarządzanie arkuszami i skoroszytami Tableau Filtrowanie i analiza danych Tableau Wektory i ramy danych w r Manipulacja strumieniem w R. Analityka z r Składnia Pythona Python Ups SQL CRUD Operations SQL łączy się i indeksy Programowanie Pythona

Q: Why you should use Test dla programisty BI?

The Test dla programisty BI 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: Łączenie ze źródłami danych w Power BI Wręczenie danych i transformacje w Power BI Formuły Dax Łączenie z danymi z wielu źródeł Tworzenie pulpitów nawigacyjnych i działań w Tableau Zarządzanie arkuszami i skoroszytami Tableau Filtrowanie i analiza danych Tableau Wektory i ramy danych w r Manipulacja strumieniem w R. Analityka z r

About the test:

Test programisty Business Intelligence wykorzystuje oparte na scenariuszach pytania wielokrotnego wyboru, aby ocenić wiedzę i umiejętności kandydata związane z modelowaniem danych i procesami ETL, hurtowaniem danych i eksplorowaniem danych, raportowaniem i wizualizacją BI, analizy danych i modelowania predykcyjnego oraz zarządzania projektami BI. Kandydaci są również oceniani na podstawie ich zdolności do korzystania z narzędzi i technologii BI, takich jak SQL Server, Power BI, Tableau i inne powiązane narzędzia oraz ich biegłość w stosowaniu technik analizy danych i inteligencji biznesowej w celu rozwiązania złożonych problemów biznesowych.

Covered skills:

Łączenie ze źródłami danych w Power BI
Formuły Dax
Tworzenie pulpitów nawigacyjnych i działań w Tableau
Filtrowanie i analiza danych Tableau
Manipulacja strumieniem w R.
Składnia Pythona
SQL CRUD Operations
Programowanie Pythona

Wręczenie danych i transformacje w Power BI
Łączenie z danymi z wielu źródeł
Zarządzanie arkuszami i skoroszytami Tableau
Wektory i ramy danych w r
Analityka z r
Python Ups
SQL łączy się i indeksy

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9 reasons why

Adaface Test dla programisty BI is the most accurate way to shortlist BI Developers

Reason #1

Tests for on-the-job skills

The Test dla programisty BI 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:

Łączenie ze źródłami danych w Power BI
Wykonywanie wirogling danych i transformacje w Power BI
Wykorzystanie formuł Dax w Power BI
Łączenie z danymi z wielu źródeł
Tworzenie interaktywnych pulpitów nawigacyjnych i działań w Tableau
Zarządzanie arkuszami i skoroszytami Tableau
Filtrowanie i analiza danych w Tableau
Praca z wektorami i ramami danych w R
Manipulowanie strunami w r
Wykonanie analizy z R.
Zrozumienie składni Pythona
Wdrażanie koncepcji Python OOPS
Wykonanie operacji SQL CRUD
Opanowanie SQL dołącza i indeksów
Wykazanie biegłości w programowaniu Pythona

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

To tylko niewielka próbka z naszej biblioteki ponad 10 000 pytań. Rzeczywiste pytania dotyczące tego Test dla programisty BI będzie nieobowiązany.

🧐 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

Dzięki Adaface udało nam się zoptymalizować nasz proces wstępnej selekcji o ponad 75%, oszczędzając cenny czas zarówno menedżerom ds. rekrutacji, jak i naszemu zespołowi ds. pozyskiwania talentów!

Brandon Lee, Głowa Ludu, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Test dla programisty BI 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 Test dla programisty BI 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 Test dla programisty BI

Why you should use Test dla programisty BI?

The Test dla programisty BI 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:

Łączenie ze źródłami danych w Power BI
Wręczenie danych i transformacje w Power BI
Formuły Dax
Łączenie z danymi z wielu źródeł
Tworzenie pulpitów nawigacyjnych i działań w Tableau
Zarządzanie arkuszami i skoroszytami Tableau
Filtrowanie i analiza danych Tableau
Wektory i ramy danych w r
Manipulacja strumieniem w R.
Analityka z 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 Test dla programisty BI?

Łączenie ze źródłami danych w Power BI
Ta umiejętność obejmuje połączenie z różnymi źródłami danych, takimi jak bazy danych, arkusze kalkulacyjne lub usługi internetowe w Power BI. Pozwala użytkownikom importować dane z różnych źródeł i korzystać z nich do tworzenia wizualizacji i raportów. Ta umiejętność jest ważna w teście, ponieważ ocenia zdolność kandydata do pracy z różnymi źródłami danych i integracja go z Power Bi.
Wręczenie danych i transformacje w Power BI
z tą umiejętnością , Kandydaci mogą wyczyścić i przekształcić surowe dane, aby nadać im do dalszej analizy w Power BI. Mogą wykonywać zadania, takie jak usuwanie niepotrzebnych kolumn, scalanie danych i tworzenie obliczonych kolumn. Ta umiejętność ma kluczowe znaczenie dla zapewnienia dokładności i jakości danych wykorzystywanych w raportach i wizualizacji Power BI.
Dax Formulas
Dax (wyrażenia analizy danych) jest językiem formuły używanym w mocy BI do tworzenia niestandardowych obliczeń i agregacji. Ta umiejętność mierzy biegłość kandydata w pisaniu formuł Dax w celu wykonania obliczeń danych, tworzenia nowych miar i budowania złożonych obliczeń. Konieczne jest ocena tej umiejętności w teście, aby ocenić zdolność kandydata do skutecznego manipulowania i analizowania danych w Power Bi.
Łączenie z danymi z wielu źródeł
Ta umiejętność ocenia kandydata kandydata Możliwość łączenia i integracji danych z wielu źródeł w jednym narzędziu wizualizacji, takich jak Tableau. Mierzy zdolność kandydata do łączenia danych i łączenia danych z różnych baz danych lub formatów plików i analizowania ich zbiorowo. Ta umiejętność jest ważna, aby kandydat może pracować ze złożonymi scenariuszami danych i tworzyć kompleksowe pulpity nawigacyjne i raporty w Tableau.
Tworzenie pulpitów nawigacyjnych i działań w Tableau
Ta umiejętność ocenia biegłość kandydata w biegłości kandydata na biegłość w kandydata Korzystanie z Tableau do projektowania interaktywnych pulpitów nawigacyjnych, które pozwalają użytkownikom eksplorować dane wizualne i wykonywać działania, takie jak filtrowanie, sortowanie i wiercenie. Ocenia zdolność kandydata do prezentacji danych w sposób przekonujący i przyjazny dla użytkownika, zapewniając wnikliwe wizualizacje i znaczące interakcje.
Zarządzanie arkuszami i skoroszytami Tableau
z tą umiejętnością, kandydaci mogą skutecznie Organizuj i zarządzaj wizualizacjami w arkuszach i skoroszytach Tableau. Mierzy zdolność kandydata do aranżowania i formatowania wizualizacji, tworzenia hierarchii i zarządzania połączeniami danych. Ta umiejętność jest ważna, ponieważ zapewnia kandydata skutecznie poruszać się i utrzymywać projekty Tableau, poprawić wydajność i współpracę.
Filtrowanie i analizowanie danych Tableau
Ta umiejętność ocenia zdolność kandydata do filtrowania i filtrowania i Analizuj dane w Tableau przy użyciu różnych technik, takich jak stosowanie filtrów, tworzenie obliczonych pól i wykonywanie agregacji. Ocenia zdolność kandydata do uzyskania znaczących spostrzeżeń z danych i przedstawienia ich poprzez wizualizacje. Ta umiejętność jest ważna, aby ocenić umiejętności analityczne kandydata i ich zrozumienie eksploracji danych w Tableau.
Wektory i struki danych w R
Ta umiejętność obejmuje pracę z wektorami i ramkami danych w R, które są podstawowymi strukturami danych używanymi do przechowywania i manipulowania danymi. Wektory to jednowymiarowe tablice, podczas gdy ramki danych są strukturami wielowymiarowymi, które mogą przechowywać różne typy danych. Ta umiejętność jest niezbędna w teście, ponieważ mierzy zdolność kandydata do wykonywania operacji danych i analizy przy użyciu tych kluczowych struktur danych w r.
Manipulację ciągami w R
Ta umiejętność ocenia kandydata kandydata Możliwość manipulowania strunami w R, takie jak wyodrębnienie podrzędnych, zastępowanie znaków lub dzielenie ciągów. Manipulacja ciągami jest ważna dla czyszczenia danych, przetwarzania tekstu i zadań inżynierii cech w R. Umiejętność ta jest oceniana w teście, aby ocenić biegłość kandydata w zakresie obsługi i manipulowania danymi tekstowymi przy użyciu odpowiednich funkcji i technik R.
Analityka z R
Ta umiejętność mierzy zdolność kandydata do stosowania technik statystycznych i analitycznych za pomocą R. Ocenia wiedzę kandydata na temat różnych pakietów R i funkcji do analizy danych, regresji, grupowania i wizualizacji. Analityka z R to znacząca umiejętność posiadania w programie BI, ponieważ umożliwia im uzyskanie informacji, budowanie modeli i podejmowanie decyzji opartych na danych za pomocą Składnia R.
Python
Ta umiejętność ocenia zrozumienie przez kandydata składni i struktury języka programowania Pythona. Ocenia ich wiedzę na temat zmiennych, typów danych, instrukcji przepływu kontroli, pętli, funkcji i innych podstawowych koncepcji Pythona. Składnia Pythona jest fundamentalną umiejętnością do pomiaru w teście, ponieważ tworzy elementy składowe pisania kodu Python do zadań manipulacji, analizy i wizualizacji.
Python Oops
Ta umiejętność ocenia biegłość kandydata w programowaniu obiektowym (OOP) przy użyciu Pythona. Ocenia ich wiedzę i zdolność do definiowania klas, obiektów, dziedzictwa, polimorfizmu i enkapsulacji. Python UOPS jest ważną umiejętnością do zmierzenia w teście, ponieważ pokazuje zrozumienie przez kandydata zasad OOP i ich zdolność do pisania kodu modułowego i wielokrotnego użytku w Python.
SQL CRUD Operations </H4> <p > Ta umiejętność mierzy biegłość kandydata w wykonywaniu CRUD (tworzenie, odczyt, aktualizacja, usuwanie) operacji w SQL, które są fundamentalnymi operacjami bazy danych. Ocenia ich zdolność do wstawienia, pobierania, aktualizacji i usuwania danych z relacyjnych baz danych za pomocą zapytań SQL. Operacje SQL CRUD są niezbędną umiejętnością do oceny w teście, ponieważ pokazuje zdolność kandydata do interakcji z bazami danych i manipulowanie danymi za pomocą połączeń SQL. </p> <h4> SQL Wiedza kandydata i zrozumienie łączy SQL, które są używane do łączenia danych z wielu tabel opartych na wspólnych kolumnach. Oceni także ich biegłość w pracy z indeksami, które poprawiają wydajność zapytań SQL. SQL dołączenia i indeksy są ważnymi umiejętnościami do pomiaru w teście, ponieważ pokazują zdolność kandydata do pobierania i manipulowania danymi ze złożonych struktur relacyjnych bazy danych. </p> <h4> Programowanie Python
Ta umiejętność ocenia kandydata Biegłość w programowaniu z Pythonem, obejmując takie tematy, jak manipulacja danymi, analiza, wizualizacja i automatyzacja. Mierzy ich zdolność do pisania kodu Pythona w celu rozwiązywania problemów biznesowych, obsługi zadań przetwarzania danych i budowania aplikacji. Programowanie Pythona jest kluczową umiejętnością do oceny w teście, ponieważ pokazuje zdolność kandydata do wykorzystania wszechstronności i mocy Pythona w różnych aspektach rozwoju BI.
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 Test dla programisty BI to be based on.
Power bi
Źródła danych
Przekształcanie danych
Formuły Dax
Łączenie z wieloma źródłami
Interaktywne pulpity nawigacyjne
Arkusze robocze Tableau
Skoroszyty Tableau
Dane filtrowania
Analiza danych
Wektory
DataFrame
Manipulacja struny
Analityka
Składnia Pythona
Python Ups
SQL CRUD Operations
SQL dołącza
Indeksy SQL
Programowanie Pythona

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What roles can I use the Test dla programisty BI for?

BI Developer
Analityk danych
Inżynier danych
Analityk Biznesowy
Administrator bazy danych
Menedżer hurtowni danych
Deweloper ETL

How is the Test dla programisty BI 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

Składnia Pythona
Python Ups
SQL CRUD Operations
SQL łączy się i indeksy
Programowanie Pythona
Zaawansowane modelowanie danych w Power BI
Praca ze złożonymi wizualizacjami danych w Tableau
Zaawansowana analityka z r
Czyszczenie danych i wstępne przetwarzanie w Python
Zaawansowane zapytania SQL i optymalizacja

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

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Menedżerowie ds. rekrutacji mieli poczucie, że dzięki technicznym pytaniom, które zadawali podczas rozmów panelowych, byli w stanie stwierdzić, którzy kandydaci uzyskali lepsze wyniki, i odróżnić się od tych, którzy również nie uzyskali takich punktów. Oni są bardzo zadowolony z jakością kandydatów wybranych do selekcji Adaface.

85%

Zmniejszenie czasu badań przesiewowych

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Test dla programisty BI Często zadawane pytania

Czy mogę połączyć wiele umiejętności w jedną niestandardową ocenę?

Tak, absolutnie. Oceny niestandardowe są konfigurowane na podstawie opisu stanowiska i będą zawierać pytania dotyczące wszystkich określonych umiejętności, które określasz.

Czy masz jakieś funkcje anty-cheatingowe lub proktorowe?

Mamy następujące funkcje anty-cheatingowe:

Pytania o niezgodne z nich
Proctoring IP
Proctoring Web
Proctoring kamery internetowej
Wykrywanie plagiatu
Bezpieczna przeglądarka

Przeczytaj więcej o funkcjach Proctoring.

Jak interpretować wyniki testów?

Najważniejsze, o czym należy pamiętać, jest to, że ocena jest narzędziem eliminacyjnym, a nie narzędziem wyboru. Ocena umiejętności jest zoptymalizowana, aby pomóc Ci wyeliminować kandydatów, którzy nie są technicznie zakwalifikowani do roli, nie jest zoptymalizowana, aby pomóc Ci znaleźć najlepszego kandydata do tej roli. Dlatego idealnym sposobem na wykorzystanie oceny jest podjęcie decyzji o wyniku progowym (zwykle 55%, pomagamy Ci porównać) i zaprosić wszystkich kandydatów, którzy wyniki powyżej progu na następne rundy wywiadu.

Do jakiego poziomu doświadczenia mogę użyć tego testu?

Każda ocena Adaface jest dostosowana do opisu stanowiska/ idealnego kandydującego osobowości (nasi eksperci przedmiotu będą podejmować właściwe pytania dotyczące oceny z naszej biblioteki ponad 10000 pytań). Ocenę tę można dostosować do dowolnego poziomu doświadczenia.

Czy każdy kandydat otrzymuje te same pytania?

Tak, znacznie ułatwia porównanie kandydatów. Opcje pytań MCQ i kolejność pytań są losowe. Mamy funkcje anty-cheating/proctoring. W naszym planie korporacyjnym mamy również możliwość tworzenia wielu wersji tej samej oceny z pytaniami o podobnych poziomach trudności.