C# and SQL Online Test

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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

Students

3min
  -  
Easy  
  -  
CODE

SQL Aggregation Public

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

5min
  -  
Easy  
  -  
CODE

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
  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.

Palindrome

10min
  -  
Easy  
  -  
CODE

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.

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Prefix, Bicycle, Classroom, Runner, Movies, Stories, 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, Segment, Shipping, Movies Live, Train, Read First Line, Stack to List, ATM Locations, Autocomplete, Ban Users, Department Report, Developers, Ingredients, Delete Orders, Log Patch, Product Refactoring, Restaurant Menu, Roads, Sales, Snapshot, Student Activities, Transactions, Projects, Hospital Patients, Bank Branches, Menu Items, Shelf, Date Transform, Document Counter, Entry, Unique Numbers, Rare, Moving Total, Max Sum, Branches, Platformer, Paper Strip, Matryoshka Doll, Friend, Movie Night, Remove Repetitions, Unique Name, Window Manager, Shining Star, Document Store, Youngest Child, Eye of the Storm, SMS Messages, Procedural Generator
Skills
C# LINQ Language Bug fixing Memory management SQL Aggregation Subqueries Dynamic programming 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 Extension Methods Refactoring Views Test case design Graphs Sorting TDD Random
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