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⚡ Topic Learning Kit

DS Stacks & Queues

English 17 leveled MCQs Free
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1

Data Structures: Stacks and Queues

~8 min · full explanation, examples & memory tricks in the app

❓ Leveled MCQ practice

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17 questions laddered from warm-up to topper-level, each with an explanation. A taste:

Which data structure follows the Last-In-First-Out (LIFO) principle?

Beginner
A Queue B Linked List C Tree D Stack
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Stack

A stack processes the most recently added element first, which is the LIFO principle.

In a queue, which operation removes an element?

Beginner
A pop B dequeue C enqueue D push
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dequeue

Dequeue removes the front element from a queue, while enqueue adds to the rear.

What is the time complexity of the push operation on a stack implemented as a linked list?

Intermediate
A $O(1)$ B $O(n^2)$ C $O(\log n)$ D $O(n)$
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$O(1)$

Pushing onto a linked-list stack adds a node at the head, which takes constant time.

Which of the following applications typically uses a stack?

Intermediate
A CPU scheduling B Function call management C Print spooling D Breadth-first search
Show answer & explanation

Function call management

Stacks are used to manage function calls, including return addresses and local variables.

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