Difference Between Stack And Queue Data Structures

What is a Queue Data Structure?

A queue is a special type of ADT also known as Abstract data type, which is known to store elements from one side knowns as ‘rear’ and remove elements from the other side known as ‘front’. ‘First in First Out’, commonly known as ‘FIFO’ is the order which is followed by the queue. In the queue, we can’t access any element as we can access in the array, we can only access the front element of the stack and push the element in the ‘rear’. A pointer is used to keep the track of the ‘front’ element of the stack and the ‘rear’ of the stack.

Let us understand the condition to check if the queue is empty or full

Condition to Check if Queue is Empty

int Empty()
{
    if(front==-1 || front==rear+1)
        return 1;
    else
        return 0;
}

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Condition to Check if Queue is Full

int Full()
{
    if(rear==MAX-1)
        return 1;
    else
        return 0;
}The pointers

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Read about Application of Queue in Data Structure here.

Must Read Stack Operations

Difference between Stack and Queue Data structure

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Frequently Asked Questions

What are stacks and queues called?

Stacks and queues are called linear data structures. A stack follows Last In, First Out (LIFO) order, where the last element added is the first to be removed. A queue follows First In, First Out (FIFO) order.

Why is queue called FIFO?

A queue is called FIFO (First In, First Out) because the first element added to the queue is the first one to be removed. This ensures that elements are processed in the order they arrive.

What kind of data can we store in the stack?

We can store homogeneous data of any data type.

What are the types of queues?

There are three types of queues which are as follows:- 

• Simple Queue
• Double Ended Queue
• Circular Queue

What is the advantage of queue over stack?

The primary advantage of a queue over a stack is that it enforces FIFO (First In, First Out) order, ensuring elements are processed in the exact order they were added.

Conclusion

In this article, we discussed the differences between the stack and queue data structures. 

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