Free CPP Algorithm Design & Data Structures Questions and Answers

Question 1

What is the primary purpose of an algorithm?

Accepted Answer

To solve problems using a defined sequence of steps

Answer

To increase the complexity of a task

Answer

To store data efficiently

Answer

To control hardware components

Question 2

Which data structure is most suitable for implementing a LIFO (Last In, First Out) principle?

Accepted Answer

Stack

Answer

Queue

Answer

Array

Answer

Linked List

Question 3

What is a binary search algorithm?

Accepted Answer

It divides the list into two and searches through one half

Answer

It is a method to sort elements in an array

Answer

It is a method to find an element in an unsorted array

Answer

It is a technique for sorting a binary tree

Question 4

What is the time complexity of an algorithm that performs a linear search in an unsorted array?

Accepted Answer

O(n)

Answer

O(1)

Answer

O(log n)

Answer

O(n^2)

Question 5

Which of the following is a non-linear data structure?

Accepted Answer

Binary Tree

Answer

Array

Answer

Linked List

Answer

Stack

Question 6

What is the space complexity of a recursive algorithm?

Accepted Answer

O(n)

Answer

O(1)

Answer

O(n^2)

Answer

O(log n)

Question 7

Which of the following is an example of a divide-and-conquer algorithm?

Accepted Answer

Merge Sort

Answer

Bubble Sort

Answer

Insertion Sort

Answer

Linear Search

Question 8

What is the primary use case of a hash table?

Accepted Answer

Direct access to data using a key

Answer

Storing data in sorted order

Answer

Linking data elements together

Answer

Recursively sorting data

Question 9

What does O(log n) time complexity represent?

Accepted Answer

Logarithmic growth

Answer

Linear growth

Answer

Exponential growth

Answer

Quadratic growth