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About the test

The C++ Algorithms online test assesses candidates' algorithmic thinking skills and their ability to implement algorithms using C++.

It's an ideal test for pre-employment screening. A good developer will be able to design and implement algorithms that are both correct and efficient. Computational complexity is important not only when scaling applications but when creating responsive, maintainable, and efficient code.

This online test requires candidates to analyze or design an algorithm using C++ as the programming language.

Sample public questions

Easy
15 min
code
Public
C++
Algorithmic Thinking
Recursion
Tree

A three-node binary tree.Binary search tree (BST) is a binary tree where the value of each node is larger or equal to the values in all the nodes in that node's left subtree and is smaller than the values in all the nodes in that node's right subtree.

Write a function that, efficiently with respect to time used, checks if a given binary search tree contains a given value.

For example, for the following tree:

  • n1 (Value: 1, Left: null, Right: null)
  • n2 (Value: 2, Left: n1, Right: n3)
  • n3 (Value: 3, Left: null, Right: null)

Call to contains(n2, 3) should return true since a tree with root at n2 contains number 3.

New
Easy
15 min
code
Public
C++
Algorithmic Thinking
Linked List
Unordered Set

A playlist is considered a repeating playlist if any of the songs contain a pointer to a previous song in the playlist. Otherwise, the playlist will end with the last song which points to NULL.

Implement a function isRepeatingPlaylist that, efficiently with respect to time used, returns true if a playlist is repeating or false if it is not.

For example, the following code prints "true" as both songs point to each other.

Song* first = new Song("Hello");
Song* second = new Song("Eye of the tiger");
    
first->next(second);
second->next(first);

std::cout << std::boolalpha << first->isRepeatingPlaylist();

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12 more premium C++ Algorithms questions

Max Sum, Platformer, Unique Numbers, Window Manager, Book Sale, Friend, Stories, Moving Total, Internal Nodes, Unique Product, Veterinarian, Paper Strip.

Skills and topics tested

  • C++
  • Algorithmic Thinking
  • Data Structures
  • Linked List
  • Unordered Map
  • Sorting
  • Graphs
  • Dynamic Programming
  • Unordered Set
  • Arrays
  • Tree
  • Queue
  • Vector

For job roles

  • Back-End Developer
  • C++ Developer

Sample candidate report

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