Welcome to the Stacks and Queues MCQs Page

Dive deep into the fascinating world of Stacks and Queues with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Stacks and Queues, a crucial aspect of Data Structures and Algorithms. In this section, you will encounter a diverse range of MCQs that cover various aspects of Stacks and Queues, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Data Structures and Algorithms.

Check out the MCQs below to embark on an enriching journey through Stacks and Queues. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Data Structures and Algorithms.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Stacks and Queues. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Stacks and Queues MCQs | Page 5 of 25

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Q41.

The data structure required to evaluate a postfix expression is

queue

stack

array

linked-list

Discuss

Answer: (b).stack

Q42.

The data structure required to check whether an expression contains balanced parenthesis is

Stack

Queue

Tree

Array

Discuss

Answer: (a).Stack

Q43.

What data structure would you mostly likely see in a non recursive implementation of a recursive algorithm?

Stack

Linked list

Queue

Trees

Discuss

Answer: (a).Stack

Q44.

The process of accessing data stored in a serial access memory is similar to manipulating data on a

heap

queue

stack

binary tree

Discuss

Answer: (c).stack

Q45.

The postfix form of A*B+C/D is

*AB/CD+

AB*CD/+

A*BC+/D

ABCD+/*

Discuss

Answer: (b).AB*CD/+

Q46.

Let the following circular queue can accommodate maximum six elements with the following data
front = 2 rear = 4
queue = _______, L, M, N, ___, ___

What will happen after ADD O operation takes place?

front = 2 rear = 5 queue = ______, L, M, N, O, ___

front = 3 rear = 5 queue = L, M, N, O, ___

front = 3 rear = 4 queue = ______; L, M, N, O, ___

front = 2 rear = 4 queue = L, M, N, O, ___

Discuss

Answer: (a).front = 2 rear = 5 queue = ______, L, M, N, O, ___

Q47.

What is the postfix form of the following prefix:
*+ab–cd

ab+cd–*

abc+*–

ab+*cd–

Discuss

Answer: (a).ab+cd–*

Q48.

A queue is a,

FIFO (First In First Out) list

LIFO (Last In First Out) list

Ordered array

Linear tree

Discuss

Answer: (a).FIFO (First In First Out) list

Q49.

Which data structure is needed to convert infix notation to postfix notation?

Branch

Queue

Tree

Stack

Discuss

Answer: (d).Stack

Q50.

The prefix form of A-B/ (C * D ^ E) is,

-/*^ACBDE

-ABCD*^DE

-A/B*C^DE

-A/BC*^DE

Discuss

Answer: (c).-A/B*C^DE

Page 5 of 25

Welcome to the Stacks and Queues MCQs Page

Stacks and Queues MCQs | Page 5 of 25

Explore more Topics under Data Structures and Algorithms

Data Structures Basics

Data Types and Abstraction

Algorithm Complexity

Arrays and Pointers

Linked Lists

Recursion

Trees

Graphs

String Operations

Sorting and Searching

Object Oriented Programming

Dynamic Programming

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