Free Mock Test : Data Structures and Algorithms : Queue(Test 1)

Home

Technology

Blog

Free Mock Test - Data Structures and Algorithms : Queue(Test 1)

In an effort to support computer science students, coding enthusiasts, and job seekers preparing for technical interviews, a comprehensive Free Online Data Structure Mock Test has been launched. The test is designed to help learners evaluate their understanding of fundamental and advanced data structure concepts through a structured and interactive assessment.
Data Structures form the backbone of computer science and software development. Topics such as Arrays, Linked Lists, Stacks, Queues, Trees, Graphs, Hashing, and Algorithms are frequently asked in academic examinations, coding competitions, and technical interviews conducted by leading technology companies.
The newly introduced mock test platform offers a wide range of multiple-choice questions (MCQs) covering beginner, intermediate, and advanced-level topics. Participants can assess their strengths and identify areas requiring further improvement through instant results and detailed explanations.

Total Questions : 30

Timer : sec

Question : What is a Queue?

LIFO data structure

FIFO data structure

Random access structure

Tree structure

Question : Which operation inserts an element into a queue?

Push

Pop

Enqueue

Dequeue

Question : Which operation removes an element from a queue?

Push

Pop

Enqueue

Dequeue

Question : In a queue, insertion takes place at:

Front

Rear

Middle

Anywhere

Question : In a queue, deletion takes place at:

Front

Rear

Middle

Anywhere

Question : Which of the following is a real-life example of a queue?

Stack of books

Browser history

People waiting at a ticket counter

Undo operation

Question : What is the time complexity of Enqueue operation in a simple queue?

O(n)

O(log n)

O(1)

O(n²)

Question : What is the time complexity of Dequeue operation in a linked-list queue?

O(1)

O(log n)

O(n)

O(n²)

Question : Which pointer indicates the first element of a queue?

Top

Head

Front

Rear

Question : Which pointer indicates the last element of a queue?

Rear

Front

Top

Root

Question : What is Queue Overflow?

Queue becomes empty

Queue becomes full

Queue is sorted

Queue is reversed

Question : What is Queue Underflow?

Queue becomes full

Queue becomes sorted

Queue becomes empty and deletion is attempted

Queue is reversed

Question : Which data structure is most suitable for implementing a queue dynamically?

Array

Linked List

Matrix

Graph

Question : In an array implementation of queue, which condition indicates an empty queue?

front = rear

front = -1

rear = n-1

rear = 0

Question : Which problem occurs in a linear queue implemented using arrays?

Overflow

Underflow

Memory wastage

Recursion

Question : Circular Queue is used to:

Sort elements

Avoid memory wastage

Reverse elements

Search elements

Question : In a Circular Queue of size N, the next position of rear is:

rear+1

rear-1

(rear+1)%N

(rear-1)%N

Question : Which queue serves elements according to priority?

Linear Queue

Circular Queue

Priority Queue

Deque

Question : Deque stands for:

Dynamic Queue

Double Ended Queue

Double Entry Queue

Dynamic Entry Queue

Question : Which operation is NOT allowed in an Input Restricted Deque?

Insert at rear

Delete at front

Delete at rear

Insert at front

Question : Consider Queue: [10, 20, 30, 40]

After one Dequeue and one Enqueue(50), queue becomes:

[10,20,30,40,50]

[20,30,40,50]

[50,20,30,40]

[20,30,40]

Question : A Circular Queue of size 5 has front=0 and rear=4. The queue is:

Empty

Full

Half Full

Cannot Determine

Question : Which traversal algorithm uses a queue?

DFS

Inorder

BFS

Postorder

Question : Which scheduling algorithm uses a Circular Queue?

FCFS

Round Robin

SJF

Priority Scheduling

Question : In a Priority Queue:

FIFO always applies

LIFO always applies

Elements are removed based on priority

Elements are sorted alphabetically

Question : If a queue contains A, B, C, D (front=A), after two dequeues and enqueue(E), enqueue(F), what is the queue?

C D E F

A B E F

E F C D

C D F E

Question : Which application commonly uses a queue?

Function Call Stack

CPU Scheduling

Recursion

Expression Evaluation

Question : What is the maximum number of elements stored in a Circular Queue of size N using the condition (rear+1)%N == front for full queue?

N-1

N+1

N/2

Question : Which data structure is used internally in Breadth First Search?

Stack

Queue

Heap

Tree

Question : A queue implemented using linked list has front and rear pointers. What is the time complexity of Enqueue and Dequeue?

O(n), O(n)

O(1), O(n)

O(n), O(1)

O(1), O(1)

About us

Term & conditions

Privacy & Policy

Free Mock Test - Data Structures and Algorithms : Queue(Test 1)

Cookies & Disclaimer