C# and SQL Online Test

TestDome skill assessments are used by more than 3,700 companies and 450,000 individual test takers.

Jobseekers: Get a Certificate

Take a Practice Test

Companies: Try First, Pay Later

Sign Up To Use This Test
 Used by: 

The C# and SQL online test assesses candidates' knowledge of programming in the C# language and their ability to use SQL.

It's an ideal test for pre-employment screening. A good C# developer needs to be able not only to solve problems using C# but also to write and analyze SQL queries to access a database.

This online test requires candidates to solve coding problems in C# and to write SQL queries that extract, combine, and manipulate data.

Recommended Job Roles

C# Developer
.NET Developer
Back-End Developer
SQL Developer
Web Developer

Sample Candidate Report

Sample Free Questions



SQL Aggregation Public

Given the following data definition, write a query that returns the number of students whose first name is John.

TABLE students
   firstName VARCHAR(30) NOT NULL,
   lastName VARCHAR(30) NOT NULL



SQL Conditions Update Public

A table containing the students enrolled in a yearly course has incorrect data in records with ids between 20 and 100 (inclusive).

TABLE enrollments

Write a query that updates the field 'year' of every faulty record to 2015.



C# Strings Public

A palindrome is a word that reads the same backward or forward.

Write a function that checks if a given word is a palindrome. Character case should be ignored.

For example, IsPalindrome("Deleveled") should return true as character case should be ignored, resulting in "deleveled", which is a palindrome since it reads the same backward and forward.

Use Free Questions On a Trial Plan

Premium Questions

The premium question library contains our unique, hand-crafted questions. We offer a refund if you find any of them answered online.

Prefix, Bicycle, Classroom, Runner, Movies, Disposable Wrapper, Index Performance, Tasks, Poll, Rectangles, Read Write Execute, Needle, Log Parser, Driver Exam, Vectors, Crop Ratio, Weighted Average, Retirees, Chicken, Racer, Authors, Countries, Employee Manager, Merge Stock Index, Paragraph, Username, Chain Link, Hobbies, Sort Params, Node, Cheapest Product, Programmer Teacher, Movies Live, Read First Line, Stack to List, ATM Locations, Autocomplete, Department Report, Developers, Ingredients, Delete Orders, Product Refactoring, Restaurant Menu, Roads, Sales, Snapshot, Student Activities, Transactions, Projects, Date Transform, Shining Star, Document Store, Youngest Child, SMS Messages, Procedural Generator, Document Counter, Adder, Shelf, Bank Branches, Hospital Patients, Internal Nodes, Movie Night, Window Manager, Moving Total, Entry, Unique Numbers, Rare, Paper Strip, Max Sum, Friend, Remove Repetitions, Unique Name, Log Patch, Matryoshka Doll, Stories, Ban Users, Train, Platformer, Menu Items, Shipping, Segment, Eye of the Storm
C# LINQ Language Bug fixing Memory management SQL Aggregation Subqueries OOP Indexes Joins Conditions Arithmetic Strings Stream Serialization Exceptions Searching Insertion Multithreading Union Data structures Arrays Iteration Algorithmic thinking Constraints Database Schema Performance tuning Update Delete Refactoring Views TDD Random Test case design Sorting Graphs Extension Methods Dynamic programming
Score Distribution
Pricing For Premium Questions

Fully Customizable Tests

Add questions from our question library.
Create your own questions.
Customize test duration, number of questions, passing score, web proctoring, and more.
Create Free Account

Private Concierge

Send us an email with an explanation of your testing needs and a list of candidates. We will create an appropriate test, invite your candidates, review their results, and send you a detailed report.

What Others Say
TestDome user reviews on G2 Crowd
Simple, straight-forward technical testing

Testdome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

Jan Opperman, Grindrod Bank

Very smooth, well supported, great for assessing candidates

Very Prompt and helpful support when needed, we were looking to work with a third party to write and set up new tests, testdome was able to quickly set up and support a method to do this, allowing us to start testing candidates straight away.

George Offer, Guided Solutions

Easy to use and efficient for testing developers of different levels

It provides us an opportunity to set our own timing policy, to choose from variety of questions from different areas and with difficulty gradation. Also it is great that TestDome provides free of charge tests for candidates to prepare and check how online IDE works. And support is always ready to help:)

Alexandra Bulka, WorkFusion

On the TestDome Blog

Screening Applicants: The Good, the Bad and the Ugly

Since we’re all biased and we use incorrect proxies, why not just outsource hiring to experts or recruitment agencies? After all, they’ve been screening people for many years, so they must know how to do it right?

Not really. I was surprised to discover that many experts disagree with each other. Everybody praises their pet method and criticises the others. Many of these methods look legitimate, but are based on...

How TestDome Works

How TestDome Works

Want to know more? Check out our tour or contact us below.

Check Tour
Schedule a Demo

The TestDome Advantage

500+ premium, hand-crafted questions for 30+ job skills and 10+ coding languages.
Proctored tests, API access, and Applicant Tracking System (ATS) Integration.
Questions with small samples of actual work instead of academic problems.

Flexible Pricing

No monthly subscription or setup fee. No minimum contract period. You only pay for the candidates you test.

View Pricing

Not exactly what you're looking for?

Related Programming Tests: