108 Questions Total

Foundations of Data Structures and Algorithms MCQs

Topic-wise practice questions for Data Structures & Algorithms. Test your knowledge, check solutions on demand, and pace your preparation.

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Q31medium

Which graph representation is most memory-efficient for a Sparse Graph (a graph with very few edges compared to vertices)?

Q32medium

Trace the result of these Stack operations: Push(10), Push(20),


Pop(), Push(30), Peek().

Q33hard

What is the Big-O complexity of an algorithm that performs 3N² + 50N + 1000 operations?

Q34hard

Which of the following algorithms is Non-Comparison based and can achieve O(N) time complexity?

Q35medium

A developer chooses Selection Sort because it has a low number of swaps. What is the major drawback of this algorithm?

Q36easy

What is the primary advantage of a Doubly Linked List over a Singly Linked List?

Q37medium

Which sorting algorithm utilizes a **Max-Heap** data structure to maintain the unsorted part of the array?

Q38easy

What is Cache Locality and why do Arrays have it?

Q39medium

You need to store a very long string that you will frequently modify (insert/delete in the middle). Which is most efficient?

Q40hard

Analyze the complexity of this nested loop:


for (int i = 0; i < n; i++) {
    for (int j = 0; j < 100; j++) {
        print(i, j);
    }
}