General Data Science and SQL Online Test

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The General Data Science and SQL test assesses a candidate’s ability to analyze data, extract information, suggest conclusions, and support decision-making. It also tests a candidate’s knowledge of SQL queries and relational database concepts.

It's the ideal test for pre-employment screening. Data scientists and data analysts need to be able to extract knowledge and insights from data. Often, they also need a solid understanding of SQL to interface and access an SQL database efficiently.

This test requires candidates to demonstrate their ability to apply probability and statistics when solving data science problems and write SQL queries that extract and combine data.

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Free Sample Questions for General Data Science 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.

Pet Detection

5min

0-33%
34-67%
68-100%

Easy

NUM

General Data Science Confusion Matrix Machine Learning Public

A classifier that predicts if an image contains only a cat, a dog, or a llama produced the following confusion matrix:

		True values
		Dog	Cat	Llama
Predicted values	Dog	14	2	1
	Cat	2	12	3
	Llama	5	2	19

What is the accuracy of the model, in percentages?

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Students

3min

0-33%
34-67%
68-100%

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

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Pets

5min

0-33%
34-67%
68-100%

Easy

CODE

SQL Select Union Public

Information about pets is kept in two separate tables:

TABLE dogs
  id INTEGER NOT NULL PRIMARY KEY,
  name VARCHAR(50) NOT NULL

TABLE cats
  id INTEGER NOT NULL PRIMARY KEY,
  name VARCHAR(50) NOT NULL

Write a query that select all distinct pet names.

See the example case for more details.

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Premium Questions for General Data Science 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.

Question Names

These premium questions are included in this pre-built test and can be added to any multi-skill test. Please sign up for a paid plan to view the questions in detail.

Authors, Cheapest Product, Countries, Developers, Employee Manager, Merge Stock Index, Movies, Movies Live, Rectangles, Retirees, Sales, Tasks, Youngest Child, Average Salary, Auto Show, Poll, Age and Earnings, Student Rankings, Bacterial Growth, Student Max Score, Billiard Club Occupancy, Cheating Indicator, Credit Wizard, Patient Classification, Subscribers, Wine Quality, Matching Clothes, Agents, Manager Sales, Movie Genres, Student Activities, Welfare Organization, Transactions, Rain, Distribution of Answers, Hiring Process, CTR, Bank Loan

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 Select Aggregation Subqueries Ordering Bug Fixing Left Join Union Group by Insert Joins SQL CASE General Data Science Linear Regression Curve Fitting Performance Tuning Outliers Bayes' Theorem Probability Decision Tree Classification Decision Boundary Poisson Distribution Correlation Multicollinearity Right Join CTE ROC Probability Distributions Machine Learning Binomial Distribution P-Value

Recommended Job Roles

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

Data Analyst

Data Scientist

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