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

Back-End Developer

SQL Developer

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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

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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.

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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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Premium Questions

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

Questions

Movies, Index Performance, Tasks, Poll, Rectangles, Function Result, Increment, Non Zero, Document Store, Crop Ratio, Increment, Babushka Doll, Retirees, Chicken, Authors, Countries, Employee Manager, Merge Stock Index, Paragraph, Chain Link, Node, Cheapest Product, Movies Live, Stack to Vector, ATM Locations, Autocomplete, Department Report, Developers, Ingredients, Delete Orders, Restaurant Menu, Roads, Sales, Student Activities, Transactions, Projects, Youngest Child, SMS Messages, Bank Branches, Hospital Patients, Battery, Hobbies, Out of Range, Weighted Average, Tiles, Needle, Date Transform, Username, Limits, Read Write Execute, Internal Nodes, Entry, Window Manager, Moving Total, Rare, Max Sum, Unique Name, Paper Strip, Friend, Unique Numbers, Stories, Ban Users, Train, Runner, Archive, Platformer, Menu Items, Shipping, Segment

Skills

SQL Aggregation Subqueries Indexes Joins Conditions C++ Bug fixing Data structures Language Memory management Insertion OOP Union Strings Algorithmic thinking Constraints Database Schema Performance tuning Update Delete Views Pointers Iteration Vector Exceptions Arithmetic Stream Conditional statements Searching Graphs Dynamic programming

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