Stack and Queue

The video tutorial covers the fundamental concepts of stack and queue data structures. It explains the principles of Last In First Out (LIFO) for stacks and First In First Out (FIFO) for queues. The tutorial also discusses the operations associated with each data structure, such as push, pop, and peek for stacks, and enqueue, dequeue, and peek for queues. Additionally, it explores the complexity and implementation of these structures using arrays and linked lists, highlighting the advantages and challenges of each approach.

What is the primary principle that a stack follows?

• Last Come Last Serve

• First Come First Serve

• Last In First Out

• First In First Out

In a stack, which operation is used to add an element?

• Push

• Pop

• Enqueue

• Peek

What does the 'peek' operation do in a stack?

• Removes the last element

• Adds a new element

• Returns the last element without removing it

• Returns the first element

Which of the following is a feature of a min stack?

• Tracks the sum of values

• Tracks the average value

• Tracks the minimum value

• Tracks the maximum value

What principle does a queue follow?

• Last In First Out

• First In First Out

• Last Come Last Serve

• First Come Last Serve

In a queue, which operation is used to remove the first element?

• Pop

• Dequeue

• Push

• Enqueue

What is the complexity of the dequeue operation in a queue implemented with an array?

• O(n)

• O(1)

• O(n^2)

• O(log n)

Which data structure is typically used to implement a queue for optimal performance?

• Hash Table

• Linked List

• Array

• Binary Tree

What does the 'enqueue' operation do in a queue?

• Removes the first element

• Adds an element to the end

• Returns the first element without removing it

• Adds an element to the beginning

In a queue, what does the 'peek' operation return?

• The first element

• The middle element

• The largest element

• The last element