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

The primary purpose of an algorithm is to solve problems by providing a defined, finite sequence of unambiguous steps or instructions. It acts as a blueprint for computation, taking an input, performing a series of operations, and producing a desired output. Algorithms are fundamental to all computer programming.

Question 2

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

Accepted Answer

Stack

Answer

A Stack is a linear data structure that strictly follows the Last In, First Out (LIFO) principle. This means the last element added to the stack is always the first one to be removed. Operations like `push` (adding an element) and `pop` (removing an element) occur only at one end, known as the 'top' of the stack.

Question 3

What is a binary search algorithm?

Accepted Answer

It divides the list into two and searches through one half

Answer

A binary search algorithm is an efficient method for finding an element within a sorted list or array. It works by repeatedly dividing the search interval in half. If the middle element is not the target, the algorithm determines whether to continue searching in the left or right half, effectively eliminating half of the remaining elements in each step.

Question 4

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

Accepted Answer

O(n)

Answer

The time complexity of a linear search in an unsorted array is O(n), which stands for 'Order of n'. In the worst-case scenario, the algorithm might have to check every single element in the array until the target is found or the end is reached. Therefore, the time taken grows linearly with the number of elements 'n'.

Question 5

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

Accepted Answer

Binary Tree

Answer

A Binary Tree is a non-linear data structure where each node has at most two children, typically referred to as the left child and the right child. Unlike linear structures like arrays, linked lists, and stacks, which arrange data sequentially, a binary tree organizes data hierarchically in a branching fashion.

CPP - Certified Professional Programmer Practice Test

CPP - Certified Professional Programmer Practice Test

Free CPP Algorithm Design & Data Structures Questions and Answers