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

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Questions

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

Skills

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

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