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Data Structures and Algorithms Objective Questions and Answers

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Test your data structures and algorithms skills with high-quality MCQs focused on problem-solving, complexity analysis, and real interview-level scenarios. Designed for developers and competitive programming practice.

Practice Data Structures and Algorithms MCQs with Detailed Explanations

Answer at least 12 questions to submit.

16.
Hard
What is the worst-case time complexity of inserting into a hash table with chaining?
17.
Hard
Which traversal technique is used in topological sorting?
18.
Medium
What is the main advantage of using adjacency lists over adjacency matrices?
19.
Medium
Which algorithm finds a minimum spanning tree?
20.
Medium
What is the output of pushing 1, 2, 3 into a stack and popping once?
21.
Hard
Which data structure supports insert, delete, and search in O(log n) time?
22.
Medium
What is the worst-case time complexity of BFS on a graph?
23.
Hard
Which algorithm technique is used in the Knapsack (0/1) problem?
24.
Medium
What is the worst-case time complexity of Binary Search?
25.
Medium
Which sorting algorithm is stable?
26.
Hard
What is the time complexity of building a heap from an array?
27.
Hard
Which problem is an example of backtracking?
28.
Hard
Which data structure is used to detect cycles in a graph using DFS?
29.
Medium
What is the space complexity of DFS using recursion?
30.
Hard
Which algorithm finds all-pairs shortest paths?
Answered: 0 / 15

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