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

15 min

A gaming company is working on a platformer game. They need a method that will compute the character's final speed, given a map and a starting speed.

The terrain on which the game character moves forward is made from various pieces of land placed together. Implement the method calculateFinalSpeed which takes the initial speed of the character, and an array of degrees of inclination that represent the uneven terrain.

The speed of the character will increase or decrease proportionally to the incline of the land, as shown in the image below:

Image showing the increase and decrease of character speed.

The magnitude of the angle of inclination will always be < 90°. The speed change occurs only once for each piece of land. The method should immediately return 0 as the final speed if an incline reduces the speed to 0 or below 0, which makes the character lose 1 life.

For example, the below code:

std::cout << GamePlatform::calculateFinalSpeed(60.0, { 0, 30, 0, -45, 0 });

should print:

20 min

Your company is analyzing malware which targets numerical record files.

The malware uses a sliding window over the array of numbers in a file, and tries to match the following pattern:

Tl, -, -, X, -, -, -, Tr

The entire window is moved so that 'X' passes through all the values and is compared to the numbers at the 'Tl' and 'Tr' locations, which are positioned at a constant offset to 'X'.

The malware has the following rules:

  • If the value at the 'Tl' or 'Tr' position of the pattern is bigger or equal to the value at the 'X’ position, the malware replaces the value at 'X' with 0.
  • If the value at the 'Tl' or 'Tr' offset is out of bounds, then the value at 'X' is only compared to the other existing value.
  • The record is processed in two stages: first, all the positions that should be set to 0 are located, using the original values for comparison. Only after all positions have been identified do they get set to 0.

For example, if the values in a record file are the following:

{1, 2, 0, 5, 0, 2, 4, 3, 3, 3}

The expected values after the malware runs are:

{1, 0, 0, 5, 0, 0, 0, 3, 3, 0}

In this example, both '2's, the '4' and the last '3' were replaced by 0.

Implement the simulate function so that the malware behavior is replicated for further study.

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56 more premium C++ questions

Non Zero, Max Sum, Unique Numbers, Moving Total, Increment, Crop Ratio, Internal Nodes, Segment, Chain Link, Tiles, Friend, Fire Dragon, Battery, Weighted Average, Paper Strip, Kilometer Converter, Function Cache, Veterinarian, Platformer, Hobbies, Out of Range, String Occurrence, Worker, Stories, Username, Window Manager, Document Store, Read Write Execute, Limits, Ship, Date Transform, Book Sale, Babushka Doll, Patient Class, Unique Product, Stack to Vector, Language Teacher, Sort Params, Flight Connections, Read First Line, Vectors, Company Stock, Archive, Flimsy Ladder, Paragraph, Procedural Generator, Airport Networks, Node, Planet Search, Shipping, Digital Flasks, Calories Burned, Circuit Simulator, Chemical Machine, Parking Allocation, Construction Game.

Skills and topics tested

  • C++
  • Bug Fixing
  • Language
  • Algorithmic Thinking
  • Unordered Map
  • Unordered Set
  • Arrays
  • Pointers
  • Integer Division
  • Tree
  • Arithmetic
  • Linked List
  • Vector
  • Graphs
  • Higher Order Function
  • Interfaces
  • OOP
  • Exceptions
  • Inheritance
  • Method Overriding
  • Hash and Equals
  • Queue
  • Data Structures
  • Iteration
  • Map
  • Stream
  • Strings
  • Memory Management
  • Dynamic Programming
  • Regex
  • Conditions
  • Sorting
  • Abstract Class
  • Complexity
  • Stack
  • Pass by Reference
  • AI Code Review
  • Conditional Statements
  • Loops
  • Destructors
  • Random
  • 2D Array
  • Recursion

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.

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Product reviews

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Capterra - 4.5 Stars
Capterra - Shortlist (2023)

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