General Data Science and SQL Online Test
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The General Data Science and SQL online 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
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?
Students
Given the following data definition, write a query that returns the number of students whose first name is John.
TABLE students id INTEGER PRIMARY KEY, firstName VARCHAR(30) NOT NULL, lastName VARCHAR(30) NOT NULL
Enrollment
A table containing the students enrolled in a yearly course has incorrect data in records with ids between 20 and 100 (inclusive).
TABLE enrollments id INTEGER NOT NULL PRIMARY KEY year INTEGER NOT NULL studentId INTEGER NOT NULL
Write a query that updates the field 'year' of every faulty record to 2015.
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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.
Age and Earnings, Billiard Club Occupancy, Cheating Indicator, Patient Classification, Subscribers, Wine Quality, Distribution of Answers, Hiring Process, CTR, Bank Loan, Roads, Authors, Autocomplete, Ban Users, Bank Branches, Cheapest Product, Countries, Developers, Hospital Patients, Index Performance, Menu Items, Merge Stock Index, Movies, Projects, Rectangles, Restaurant Menu, Retirees, SMS Messages, Poll, Users and Accounts, Matching Clothes, Agents, Sales, Employee Manager, Auto Show, Delete Orders, Welfare Organization, Tasks, Manager Sales, Student Rankings, Student Activities, Youngest Child, Movies Live, Department Report, Ingredients, Average Salary, Movie Genres, Rain, River Discharge, Credit Wizard, Bacterial Growth, ATM Locations, TransactionsCovered 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.
General Data ScienceRecommended Job Roles
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