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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Q41easy
Why are Strings often Immutable in modern languages like Java?
Q42medium
You are given an unsorted dataset of 1,000,000 records. You need to search for a specific record only once. Which strategy is most time-efficient?
Q43hard
Searching for a value in a Binary Search Tree (BST) follows a logic most similar to which searching algorithm?
Q44hard
What happens in a Null Pointer Dereference?
Q45easy
A "Directed Acyclic Graph" (DAG) is a graph that:
Q46hard
What is the time complexity of deleting the first element of a standard Array of size N?
Q47hard
What is the primary purpose of Asymptotic Analysis in computer science?
Q48medium
How many comparisons does Insertion Sort perform in the **Best Case** (already sorted array of size N)?
Q49medium
Radix Sort sorts numbers by processing individual digits. Which sorting algorithm is typically used as the "stable" subroutine for Radix Sort?
Q50hard
What is the time complexity of the Jump Search algorithm when using the optimal block size of √N?