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BI Developer Test

The BI Developer Test is preferred by recruiters to assess on-the-job skills of candidates before an interview. It reduces technical screening time by 80% by enabling employers to identify qualified candidates.

Customized Based On:

  • Experience/ difficulty level
  • Multiple skills in 1 assessment
  • Job description/ role requirements

Topics:

File Optimization
Data source connectors
Power BI Conditional Column
Template files
Dashboard sharing
Direct Query

To do basic calculation and data analysis on data in power pivot, we use Data Analysis Expression (DAX).

DAX
Import to Power BI

Power Desktop is an aggregated tool of Power Query, Power View, and Power Pivot.

Power BI Desktop
Loading data
Visualising data
See full list

Sample Adaface BI Developer Test Questions

These are just a small sample from our library of 10,000+ questions. The actual questions on this BI Developer Test will be non-googleable.

🧐 Question🔧 Skill💪 Difficulty⌛ Time
Change display icon
What steps would you take to change the following view so that Office Supplies is represented by a different symbol?
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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
TableauEasy2 min
CSV load data
Consider the following file:
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The file might have incomplete data stored with ! or ?. Which of the following R snippets will load the file completely?
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REasy2 min
Dataframe Transform
Review the following Dataframe 'bazinga':
 image
Which of the following commands would turn it into the Dataframe shown below:
 image
 image
RMedium3 min
Multi Select
Consider the following SQL table:
 image
How many rows does the following SQL query return?
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SQLMedium2 min
DAX
We want to create a DAX formula in Power BI that automatically calculates the previous month number. If month is May, the formula would return 4. We have already created the DAX formula: 
Today Month = MONTH (Sales[Todays Date])
Which of the DAX formulas below would be the right choice next?
A: Previous Month = Sales[Today Month]-1
B: Previous Month = PREVIOUSMONTH(Sales[Today Month])
C: Previous Month = STARTOFMONTH(Sales[Today Month])-1
D: Previous Month = IF (Sales[Today Month] =1, 12,Sales[Today Month]-1) (correct)
Power BIEasy3 min
ZeroDivisionError and IndexError
What will the following Python code output?
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Exceptions
PythonMedium2 min
Session
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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?
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File Handling Dictionary
PythonHard2 min
Max Code
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:
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Arrays
PythonEasy2 min
Select & IN
Consider the following SQL table:
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Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
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SQLEasy3 min
With, AVG & SUM
Consider the following SQL table:
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How many tuples does the following query return?
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SQLMedium2 min

How to use the Adaface BI Developer Test

Start screening candidates within minutes with the ready-to-go BI Developer Test

1. Choose the most appropriate test for your role

2. Start inviting candidates to complete the assessment

3. Receive real time notifications and shortlist the best candidates

OR Customize the Adaface BI Developer Test according to your job description

1. Get a custom assessment from our library of 500+ skills within 48 hours

2. Start inviting candidates to complete the assesment

3. Receive real time notifications and shortlist the best candidates

Adaface BI Developer Test is trusted by enterprises worldwide

amazon
PayPal
Morgan Stanley
Adidas
SG Government
Neilsen
UCLA
Ernst and Young
Microsoft
WeWork
Bosch
Optimum Solutions
SAP
Doubtnut
Deloitte
HCL
FusionCharts
United Nations
Sokrati
Love Bonito
ZiMetrics
MTM

About the Adaface BI Developer Test

Topics:

File Optimization
Data source connectors
Power BI Conditional Column
Template files
Dashboard sharing
Direct Query

To do basic calculation and data analysis on data in power pivot, we use Data Analysis Expression (DAX).

DAX
Import to Power BI

Power Desktop is an aggregated tool of Power Query, Power View, and Power Pivot.

Power BI Desktop
Loading data
Visualising data

Slicers in Power BI are the simple forms of filters that play a key role in designing customized charts and reports on the Power BI Desktop.

Slicers
Bookmarks
Dates

Power Pivot enables you to import millions of rows from heterogeneous sources of data into a single Excel sheet.

Power Pivot

Power Query helps in finding, editing and loading external data.

Power Query

Power Map is an Excel add-in that provides a powerful set of tools to help us visualize and gain insight into large sets of data that have a geo-coded component.

Power Map

Content packs for services are pre-built solutions for popular services.

Content packs

The FILTER function returns a table with a filter condition applied for each of its source table rows.

FILTER
Data View
Data Integration
Tableau Marks
Context Filter

Tableau can merge two or more different data sources in the same worksheet by creating relationships among common fields of these data sources.

Data Merging

Data extracts are the subsets of data created from data sources.

Tableau Extracts
Tableau Filters

Tableau action is a dashboard action which is an interactive element on a Tableau dashboard that is driven from within the worksheet.

Tableau Actions
Tableau Drill

Aggregation of data refers to displaying the measures and dimensions in an aggregated form.

Tableau Aggregations

Tableau Desktop is used to create optimized queries out from pictures of data.

Tableau Desktop

Parameter is a variable (number, string, or date) created to replace a constant value in calculations, filters, or reference lines.

Parameter

Groups are created to visualize larger memberships using dimensions.

Groups

The data engine is useful when you need to create, refresh, or query extracts.

Data Engine
Data Source
Heat Map

Join is used to combine two or more tables within the same data source.

Join

Blending is used to combine data from multiple data sources such as Excel, Oracle, SQL, etc.

Blending
Rank Function
Analytics with R & tools
Introduction to Statistics
Data Manipulation using R
Machine Learning Techniques using R
Exploratory Data Analysis
Regression Analysis
Data Science Basics
String Manipulation
Vector
Matrix
Dataframe
CSV
Rmarkdown
linear regression

A confusion matrix can be used to evaluate the accuracy of the model built.

confusion matrix
Random Forest
Analytics with R & tools
package
R6 Class
shinyR

The apply function allows one to make entry-by-entry changes to data frames and matrices.

apply function
Clustering
kmeans clustering
hierarchical clustering

Rattle is a popular GUI for data mining using R.

rattle
White Noise model

Principal Component Analysis is a method for dimensionality reduction.

Principal Component Analysis

initialize() function is used to initialize the private data members while declaring the object.

initialize()
evaluate_model()
Predictive Mean Matching
preloaded datasets
next
custom function
by()
factor variable
Radix
R decision tree
Data import

A scope is a block of code where an object in Python remains relevant.

Scope

Decorators are functions that add functionality to an existing function in Python without changing the structure of the function itself.

Decorators

Lambda is an anonymous function in Python, that can accept any number of arguments, but can only have a single expression.

Lambda

Xrange

xrange

A Python iterator is an object that contains a countable number of values.

Iterator

dele()

split()

OOP is a widely used paradigm across various popular programming languages like Python.

OOPs

selv-

self

Inheritance allows us to define a class that inherits all the methods and properties from another class.

Inheritance

foreldre

parent

It is useful for initializing any attributes or default behaviour of the object at the time of instantiation.

init

A namespace in Python refers to the name which is assigned to each object in Python.

namespace

overstyring

override

skiver

slicing

Streng

String

Globale variabler

Global Variables

Lokale variabler

Local Variables

It defines one-to-one relationship between keys and values in Python.

Dictionary

Tråder

Threads

Funksjoner

Functions

A Python class is a user-defined data structure, which holds its own data members and member functions. These can be accessed and used by creating an instance of that class.

Class

Multi Threading.

Multi Threading

Keys are used to establish and identify relationships between tables and also to uniquely identify any record or row of data inside a table.

Relational Keys

A SELECT query retrieves zero or more rows from one or more database tables or database views.

Select Queries

A JOIN clause is used to combine rows from two or more tables, based on a related column between them.

Joins
Data Modelling
Fact and Dimension Table Types

A star schema is a logical database design that is included in decision support applications.

Star Schema
Snow Flake Schema

Conditional statements are used to define what logic is to be executed based on the status of some condition being satisfied.

Conditions

In SQL, a view is a virtual table based on the result-set of an SQL statement.

Views

SQL constraints are used to specify rules for the data in a table.

Constraints
Create table
Database schema

The SELECT statement is used to select data from a database.

Select
Server
Performance Tuning

An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation time.

ENUM
Optimization
String functions

The GROUP BY Statement in SQL is used to arrange identical data into groups with the help of some functions.

GROUP BY
DELETE
Aggregation

An SQL trigger is a database object which fires when an event occurs in a database.

Triggers
CTE
JSON
Ordering
Columns

The UNION operator is used to combine the result-set of two or more SELECT statements.

UNION
CHAR
Heap Table

An SQL key is either a single column (or attribute) or a group of columns that can uniquely identify rows (or tuples) in a table.

Keys

The SQL Like is a logical operator that is used to determine whether a specific character string matches a specified pattern.

LIKE
Storage

A transaction is the logical work unit that performs a single activity or multiple activities in a database.

Transaction
Database Schema
Query

SQL index is a quick lookup table for finding records users need to search frequently.

Index

Distribution Of Test Scores

The actual score distributon will vary based on your candidate pipeline quality, but you should typically expect ~20% of the candidates to do well on Adaface assessments.

The score distribution for our assessments follow the normal curve. This is a good sign- standardized tests like SAT and GRE follow the normal distribution (bell curve).

Status quo assessments typically have the exact opposite of the bell curve (too many candidates getting close to 0, too many candidates getting close to 100 and too few candidates in the middle). This is typically because they focus on theoretical questions or trick questions, which are very binary in nature- either you know the trick/ theory or you don’t.

How Adaface Is Different

Adaface conversational assessments are reflective of on-the-job skills and see an 86% completion rate as compared to ~50% for traditional assessment platforms.

OLD WAY

TRADITIONAL TESTS

Theoretical questions/ puzzles

Feels like a test

One-size-fits-all assessments

😞
HIRE IN
Weeks/Months

NEW WAY

ADAFACE ASSESSMENTS

Questions for on-the-job skills

Conversational

Customized
assessments

😀️
HIRE IN
Days

FAQs

What is a custom assessment?

Every role is different and requires a custom assessment to identify top candidates efficiently. Adaface subject matter experts understand your job description/ role requirements and pick the most relevant questions from our library of 10000+ questions to create a technical assessment that helps you find the qualified candidates in your candidate pipeline quickly. All custom assessments are set up based on the job description, role requirements, must-have skills, experience level and salary range within a maximum of 48 hours and you will get an email notification once it goes live.

Check out a sample assessment here (no credit card required).

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify.

How is Adaface different from other assessment tools?

We believe that status quo tech assessment platforms are not a fair way for companies to evaluate engineers because they focus on trick questions/ puzzles/ niche algorithms. We started Adaface to help companies find great engineers by assessing on-the-job skills required for a role. Read more about why we started Adaface.

Here's what's different with Adaface:

  • High quality non-googleable questions that test for on-the-job skills as opposed to theoretical knowledge.
  • A friendly conversational assessment with a chatbot, instead of sending a "test" to a candidate. This translates to a higher completion rate. Adaface assessments (86% candidate completion rate), as opposed to traditional tests (40-50% candidate completion rate)
  • Customized assessments for 700+ skills at different experience levels.
Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Web proctoring
  • Webcam proctoring
  • Plagairism detection
  • Non-googleable questions
  • Secure browser

Read more the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

The platform is completely self-serve, so here's one way to proceed:

  • You can sign up for free to get a feel for how it works.
  • The free trial includes one sample assessment (Java/ JavaScript) that you will find in your dashboard when you sign up. You can use it to review the quality of questions, and the candidate experience of a conversational test on Adaface.
  • To review the quality of questions, you can also review our public questions for 50+ skills here.
  • Once you're convinced that you want to try it out with real assessments and candidates, you can pick a plan according to your requirements.
I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


Brandon Lee, Head of People, Love, Bonito

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