C++ Online Test

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About the test

The C++ online test assesses knowledge of programming in the C++ language and commonly used parts of the C++ Standard Library. This test requires solving live coding problems in C++.

The assessment includes work-sample tasks such as:

  • Implementing and properly using algorithms and data structures to optimize application performance.
  • Optimizing memory management and fixing memory leaks.
  • Working with OOP principles and higher-order functions to write reusable code.

A good C++ developer needs a solid understanding of the C++ programming language and the ability to take advantage of the functionality provided by the Standard Library to write robust and maintainable code.

Sample public questions

10 min

Implement the unique_names method. When passed two vectors of names, it will return a vector containing the names that appear in either or both vectors. The returned vector should have no duplicates.

For example, calling unique_names(std::vector<std::string>{"Ava", "Emma", "Olivia"}, std::vector<std::string>{"Olivia", "Sophia", "Emma"}) should return a vector containing Ava, Emma, Olivia, and Sophia in any order.

10 min

Implement the function findRoots to find the roots of the quadratic equation: ax2 + bx + c = 0.  The function should return a pair containing both roots in any order. If the equation has only one solution, the function should return that solution as both elements of the pair. The equation will always have at least one solution.

The roots of the quadratic equation can be found with the following formula: A quadratic equation.

For example, findRoots(2, 10, 8) should return a pair containing (-1, -4) or (-4, -1) as the roots of the equation 2x2 + 10x + 8 = 0 are -1 and -4.

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47 more premium C++ questions

Non Zero, Document Store, Babushka Doll, Out of Range, Max Sum, Shipping, Limits, Archive, Hobbies, Node, Paragraph, Platformer, Ship, Unique Numbers, Username, Weighted Average, Window Manager, Book Sale, Friend, Function Cache, Stories, Moving Total, Increment, Crop Ratio, Battery, Stack to Vector, Internal Nodes, Fire Dragon, Kilometer Converter, String Occurrence, Worker, Unique Product, Segment, Read Write Execute, Date Transform, Chain Link, Tiles, Veterinarian, Paper Strip, Read First Line, Language Teacher, Flight Connections, Patient Class, Animal Hierarchy, Sort Params, Vectors, Procedural Generator.

Skills and topics tested

  • C++
  • Bug Fixing
  • Language
  • Memory Management
  • Exceptions
  • Algorithmic Thinking
  • Arithmetic
  • Conditional Statements
  • Destructors
  • Iteration
  • Map
  • Vector
  • Recursion
  • Tree
  • Regex
  • Strings
  • Data Structures
  • Linked List
  • Unordered Map
  • Sorting
  • Graphs
  • Hash and Equals
  • Dynamic Programming
  • Unordered Set
  • Arrays
  • Pointers
  • Integer Division
  • Complexity
  • Stack
  • Higher Order Function
  • Interfaces
  • OOP
  • Inheritance
  • Method Overriding
  • Stream
  • Queue
  • Abstract Class
  • Pass by Reference
  • Random

For job roles

  • Back-End Developer
  • C++ Developer

Sample candidate report

What others say

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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

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