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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.

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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

Explore more Topics under Data Structures and Algorithms

Q41.
The data structure required to evaluate a postfix expression is

a.

queue

b.

stack

c.

array

d.

linked-list

Discuss
Answer: (b).stack
Q42.
The data structure required to check whether an expression contains balanced parenthesis is

a.

Stack

b.

Queue

c.

Tree

d.

Array

Discuss
Answer: (a).Stack
Q43.
What data structure would you mostly likely see in a non recursive implementation of a recursive algorithm?

a.

Stack

b.

Linked list

c.

Queue

d.

Trees

Discuss
Answer: (a).Stack
Q44.
The process of accessing data stored in a serial access memory is similar to manipulating data on a

a.

heap

b.

queue

c.

stack

d.

binary tree

Discuss
Answer: (c).stack
Q45.
The postfix form of A*B+C/D is

a.

*AB/CD+

b.

AB*CD/+

c.

A*BC+/D

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?

a.

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

b.

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

c.

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

d.

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

a.

ab+cd–*

b.

abc+*–

c.

ab+*cd–

d.

ab+*cd–

Discuss
Answer: (a).ab+cd–*
Q48.
A queue is a,

a.

FIFO (First In First Out) list

b.

LIFO (Last In First Out) list

c.

Ordered array

d.

Linear tree

Discuss
Answer: (a).FIFO (First In First Out) list
Q49.
Which data structure is needed to convert infix notation to postfix notation?

a.

Branch

b.

Queue

c.

Tree

d.

Stack

Discuss
Answer: (d).Stack
Q50.
The prefix form of A-B/ (C * D ^ E) is,

a.

-/*^ACBDE

b.

-ABCD*^DE

c.

-A/B*C^DE

d.

-A/BC*^DE

Discuss
Answer: (c).-A/B*C^DE
Page 5 of 25

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