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Data Warehouse and SQL Online Test

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The Data Warehouse and SQL online test assesses candidates' knowledge of data warehouses and their ability to use SQL.

It's an ideal test for pre-employment screening of candidates applying for roles such as Big Data Engineers, Data Warehouse Developers, and Data Warehouse Administrators.

This online test requires candidates to answer multiple-choice questions about data warehouses and to write SQL queries that extract, combine, and manipulate data.

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Free Sample Questions for Data Warehouse and SQL Test

Our sample questions are free for companies to use on a trial plan. See more about our premium questions for paid plans below.

Daily News Performance

3min
  -  
Easy 
  -  
MCA

Data Warehouse Drilldown OLAP Operations Pivot New Public

Management of a multinational news company would like to see how the number of viewers of different news sections varies per country, for each day.

The data is in an OLAP cube and needs to be transformed to get the data the management is looking for. Below are the diagrams of starting and expected OLAP cubes:

What operations should be performed to transform the first OLAP cube into the second OLAP cube?

(Select all acceptable answers.)

Students

3min
  -  
Easy  
  -  
CODE

SQL Aggregation Select Public

Given the following data definition, write a query that returns the number of students whose first name is John. String comparisons should be case sensitive.

TABLE students
   id INTEGER PRIMARY KEY,
   firstName VARCHAR(30) NOT NULL,
   lastName VARCHAR(30) NOT NULL

Lumber Cut

3min
  -  
Easy 
  -  
MCA

Data Warehouse Software architecture New Public

A construction supply company wants to implement a data warehouse to analyze the performance of their online portal for ordering custom cuts of lumber.

Their sales data is currently stored in two separate transaction processing relational databases, one contains inventory and the other one contains sales data. Both databases save their data in a normalized schema. One of the reasons for implementing a data warehouse is that querying the databases for average sales data and inventory status through time is slow and causes some online transactions to timeout.

How should the data warehouse be implemented?

(Select all acceptable answers.)

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Premium Questions for Data Warehouse and SQL Test

TestDome offers a premium questions library with 1000+ unique, hand-crafted questions whose answers can’t be found online. If you spot an answer somewhere online, we’ll give you a refund.

Covered Skills

Testing of these skills is covered in this pre-built test because they’re closely related. On our paid plan, you can easily create your own custom multi-skill tests.

SQL Conditions Views Constraints Create table Database schema Select Create index Performance tuning Alter table Aggregation Subqueries Ordering Bug fixing Left join Indexes Union Group by Update Insert Joins Delete SQL CASE Right join Database normalization CTE Data Warehouse Snowflake schema OLAP cube Dice OLAP Operations Pivot Software architecture Drilldown Slices
Recommended Job Roles

These are the job roles that we recommend for the Data Warehouse and SQL online test.

Big Data Engineer
Data Warehouse Administrator
Data Warehouse Developer

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