DSA Interview Quiz Quiz

Test your knowledge of core Data Structures and Algorithms (DSA) concepts with these easy DSA interview questions and answers. This quiz covers arrays, queues, linked lists, sorting, trees, and more for your DSA interview preparation.

1. File Structure vs. Storage Structure

   Which statement best describes the difference between file structure and storage structure in data structures?

   1. File structure relates to auxiliary memory while storage structure refers to main memory.
   2. File structure is always faster than storage structure.
   3. File structure and storage structure are exactly the same.
   4. File structure is part of the CPU and storage structure is part of the GPU.

2. Linked List Type

   In which way can a linked list be classified based on its usage?

   1. Always as a tree structure
   2. Either linear or non-linear depending on its application
   3. Only as a linear data structure
   4. As a circular data structure only

3. Array Element Reference

   How can you reference all elements of a one-dimensional array in a program?

   1. Using an indexed loop that iterates from 0 up to array size minus one
   2. Through direct function calls for each element
   3. By creating a new array to copy elements
   4. By manually naming each element one by one

4. Dynamic Data Structures

   Which of the following is an example of a dynamic data structure that adjusts its size during runtime?

   1. Dynamic array
   2. Fixed-size array
   3. Static variable
   4. Constant

5. Meaning of Dequeue

   What is a dequeue in the context of data structures?

   1. A kind of linked list only storing null values
   2. A double-ended queue allowing insertions and deletions at both ends
   3. A queue that always remains empty
   4. A stack that allows insertions only at the top

6. Queue Operations

   Which operation adds an element to the end of a queue?

   1. isEmpty()
   2. dequeue()
   3. delete()
   4. enqueue()

7. Merge Sort Definition

   What type of algorithm is merge sort and how does it function?

   1. An algorithm that only sorts arrays with three elements
   2. A linear search method used for duplicates
   3. A divide-and-conquer algorithm that merges sorted lists
   4. A brute force algorithm that compares every element

8. Selection Sort Process

   How does selection sort organize an unsorted list?

   1. By only sorting half the list at a time
   2. By using random swaps to arrange elements
   3. By repeatedly picking the smallest element and moving it to the front
   4. By shuffling all elements at once

9. Applications of Graphs

   Which of the following is an application of graph data structures?

   1. Printing numbers in sequence
   2. Storing a single integer value
   3. Adding two numbers together
   4. Social network analysis representing people as vertices and friendships as edges

10. AVL Tree Explanation

    What property defines an AVL tree in data structures?

    1. It does not allow insertion or deletion operations.
    2. It only allows one element per node.
    3. It always has an odd number of nodes.
    4. It maintains a height difference of at most one between left and right subtrees at any node.