C++ Online Test

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The C++ online test assesses candidates' knowledge of programming in the C++ language and their ability to leverage commonly used parts of the C++ Standard Library.

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 recognize when to leverage the functionality provided by the Standard Library to write robust and maintainable code.

This online test requires candidates to solve coding problems in C++ and find and fix bugs in a C++ program.

Recommended Job Roles
Back-End Developer
C++ Developer
Sample Candidate Report

Sample Free Questions

Merge Names

10min
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Easy  
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CODE

C++ Arrays Public

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.

Binary Search Tree

15min
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Easy 
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CODE

C++ Algorithmic thinking Recursion Tree Public

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.

User Input

15min
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Easy  
  -  
CODE

C++ Inheritance OOP Public

User interface contains two types of user input controls: TextInput, which accepts all characters and NumericInput, which accepts only digits.

Implement the following methods:

  • add on class TextInput - adds the given character to the current value
  • getValue on class TextInput - returns the current value
  • add on class NumericInput - overrides the base class method so that each non-numeric character is ignored

For example, the following code should output "10":

TextInput* input = new NumericInput();
input->add('1');
input->add('a');
input->add('0');
std::cout << input->getValue();
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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
Non Zero, Document Store, Babushka Doll, Out of Range, Tiles, Needle, Max Sum, Paper Strip, Shipping, Read Write Execute, Limits, Stories, Runner, Segment, Archive, Chain Link, Chicken, Crop Ratio, Date Transform, Veterinarian, Hobbies, Increment, Increment, Internal Nodes, Node, Paragraph, Platformer, Stack to Vector, Ship, Unique Product, Unique Numbers, Username, Weighted Average, Window Manager, Battery, Book Sale, Friend, Function Cache, Moving Total
Skills
C++ Bug fixing Language Memory management Exceptions Vector Stream Strings Algorithmic thinking Arithmetic Conditional statements Dynamic programming Destructors Linked list Higher order function Interfaces OOP Integer division Regex Queue Iteration Map Pointers Arrays Tree Recursion Data structures Complexity Stack Unordered map Sorting Graphs Hash and equals Unordered set
Score Distribution
# of candidates
0-33%
34-66%
67-100%
Score
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