# What Are Types of Data Structure McQ?

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Angela Bailey

Data structures are essential concepts in computer science and programming. They provide a way to organize and store data efficiently, allowing for easier manipulation and retrieval.

One common way to assess your knowledge of data structures is through Multiple Choice Questions (MCQs). In this article, we will explore the different types of MCQs related to data structures.

## 1. Array MCQs:

Arrays are a fundamental data structure that stores a fixed-size sequence of elements of the same type. Here are some common MCQs related to arrays:

• Q1: Which data structure is best suited for random access and has constant-time complexity for accessing an element?
a) Array
c) Stack
d) Queue
• Q2: What is the time complexity for accessing an element in an array?
a) Constant-time complexity
b) Linear-time complexity
d) Logarithmic-time complexity
• Q3: How do you declare an array with n elements in C++?
a) int arr[] = new int[n];
b) int arr[n];
c) int arr = new int[n];
d) int arr() = new int[n];

A linked list is a linear data structure consisting of nodes where each node points to the next node in the sequence. Let’s look at some MCQs related to linked lists:

• Q1: Which data structure allows for efficient insertion and deletion at both the beginning and end of the list?
a) Array
c) Stack
d) Queue
• Q2: What is the time complexity for inserting an element at the beginning of a linked list?
a) Constant-time complexity
b) Linear-time complexity
d) Logarithmic-time complexity
• Q3: How do you declare a node in a singly linked list in Java?
a) Node node = new Node();
b) Node node = new Node<>();
c) Node node = new Node(null);
d) Node node = new Node(data, next);

## 3. Stack MCQs:

A stack is an abstract data type that follows the Last-In-First-Out (LIFO) principle. Here are some MCQs related to stacks:

• Q1: Which operation adds an element to the top of the stack?
a) Push
b) Pop
c) Both Push and Pop
d) None of the above
• Q2: What happens when you try to pop an element from an empty stack?
a) The program crashes with an error
b) It throws an exception indicating underflow
c) The stack remains unchanged
d) None of the above
• Q3: Which data structure is best suited for implementing a stack?
a) Array
c) Queue
d) All of the above

## 4. Queue MCQs:

A queue is another abstract data type that follows the First-In-First-Out (FIFO) principle. Let’s explore some MCQs related to queues:

• Q1: Which operation adds an element to the end of the queue?
a) Push
b) Pop
c) Enqueue
d) Both Push and Enqueue
• Q2: What happens when you try to dequeue an element from an empty queue?
a) It throws an exception indicating underflow
b) The program crashes with an error
c) The queue remains unchanged
d) None of the above
• Q3: Which data structure is best suited for implementing a queue?
a) Array