Stacks In Data Structures — Part 1 MCQs with Explanations

O(1) is the correct answer to “What is the time complexity of push operation in a stack implemented using an array”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Pop is the correct answer to “Which of the following operations is performed last in a stack”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Last In First Out is the correct answer to “What is the stack's behavior when it's described as LIFO”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

All of the above is the correct answer to “How can you implement a stack using a linked list”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Stack is the correct answer to “Which data structure would you use to evaluate a postfix expression”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

An error is thrown is the correct answer to “What is the result of calling the pop operation on an empty stack”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Check if the size is zero is the correct answer to “How do you check if a stack is empty”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Peek is the correct answer to “Which operation on a stack is used to retrieve the top element without removing it”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

For implementing recursion is the correct answer to “In which scenario is a stack particularly useful”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

By using a fixed-size array is the correct answer to “How would you implement a stack with constant space complexity”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

O(n) is the correct answer to “What is the space complexity of a stack implemented using a linked list with n elements”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

10 is the correct answer to “What is the maximum number of elements that can be held in a stack with a fixed size of 10”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

An error is thrown is the correct answer to “What happens when a stack overflows”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

By using additional recursive calls is the correct answer to “How can you reverse a stack using recursion”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Enqueue is the correct answer to “Which of the following is NOT a valid operation for a stack”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Balanced parentheses is the correct answer to “Which of the following problems can be solved efficiently using a stack”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

The stack overflows is the correct answer to “In a stack implemented using an array, what happens if the stack exceeds its predefined size”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

O(1) is the correct answer to “What is the time complexity for accessing the top element in a stack implemented using an array”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Enqueue is the correct answer to “Which operation is NOT typically associated with stacks”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

No fixed size limit is the correct answer to “What is the main advantage of using a linked list to implement a stack compared to an array”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

By using one queue for stack operations and another for temporary storage is the correct answer to “How can you implement a stack using two queues”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Depth-First Search is the correct answer to “Which of the following algorithms uses a stack to store its function calls”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

The stack becomes [10, 15] is the correct answer to “What is the result of performing a pop operation on a stack that contains elements [5, 10, 15]”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Implementing a breadth-first search is the correct answer to “In which scenario would a stack not be suitable for use”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Using a linked list is the correct answer to “How do you implement a stack with O(1) time complexity for both push and pop operations”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

The stack is empty is the correct answer to “What is the effect of a stack's top pointer being NULL”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Push operators onto the stack and pop them according to precedence is the correct answer to “What is the correct order of stack operations when performing the infix to postfix conversion”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Compare their sizes and elements is the correct answer to “How can you check if two stacks are equal”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

O(1) is the correct answer to “What is the time complexity of peeking at the top element of a stack implemented using a linked list”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Adds an element to the top of the stack is the correct answer to “In a stack, what does the push operation do”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Pop is the correct answer to “Which stack operation is typically used to undo the most recent action in applications”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Underflow is the correct answer to “In a stack, what is the term used to describe the condition when elements are removed until it is empty”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Use an additional stack to keep track of minimums is the correct answer to “How would you implement a stack that supports minimum element retrieval in constant time”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Search is the correct answer to “Which of the following operations cannot be performed in O(1) time in a stack”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

An overflow error occurs is the correct answer to “What happens when you push an element onto a stack that is already full (in a fixed-size stack)”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Evaluating infix expressions is the correct answer to “Which of the following problems can be efficiently solved using a stack”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

By using one stack for push and the other for pop operations is the correct answer to “How do you implement a stack using two stacks”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

To store the function's return address is the correct answer to “What is the typical application of a stack in function calls”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

O(n) is the correct answer to “What is the time complexity of accessing an element at the bottom of a stack implemented using a linked list”. This question is standard in competitive examination syllabi for Stacks In Data Structures.

Push each opening bracket and pop on closing brackets is the correct answer to “How can you check if a given sequence of brackets is balanced using a stack”. This question is standard in competitive examination syllabi for Stacks In Data Structures.