Hey there, fellow learners! As you navigate the world of computer science, you’ve probably encountered the tricky questions of data structures in your semester exams. It’s like you are trying to solve a puzzle with coding! These exams often throw at you questions that test your understanding of data structure, algorithms, problem-solving, and efficiency.

In this blog, we are diving into the most common, important and frequently asked data structure questions in the semester exams. Whether you’re just starting out your preparations or have done some before, this post will be best suitable for you. We have broken down the concepts and sharing some smart problem-solving tips, and get you ready to tackle those tricky and important semester exam questions.

Whether you’re aiming to score good marks, CGPA or just willing to save yourself from backlogs, or prepping for a tech interview, or just want to understand data structures better, this is one go list.

Below are the unit wise list of all previously asked most important Data Structure Questions. You should must revise and prepare it to clear your B Tech Semester exam without any backlogs of Data Structure Subjects.

## Unit 1: Introduction to data structure

### Questions

- What do you mean by data structure? Describe about its need and types.
- Explain primitive and non-primitive data structure.
- What is data type? Write the all built in data type of C.
- What do you mean by algorithm? Write the criteria of an algorithm and its characteristics.
- What do you mean by efficiency of an Algorithm?
- What do you mean by complexity. Explain space and time complexity.

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## Unit 2: Array and linked list

### Questions

- What is an array? Discuss its type.
- Explain the Single and Multidimensional Arrays with example.
- What is row-major order? Explain with example.
- What is column-major order? Explain with example.
- Write an algorithm to multiply two matrices and determine complexity of the algorithm.
- Determine addressing formula to find the location of (i,j)th element of a m*n matrix stored in column-major order.
- Consider the linear arrays AAA[5:50],BBB[-5:10] and CCC[1:8]

** Access Full List Here** 👉 Data Structure Unit 2 Questions Answers

## Unit 3: Searching and Sorting

### Questions

- Write a note on searching in data structure.
- Write a algorithm for linear search technique.
- Write a algorithm for binary search technique.
- Explain binary search tree.
- Explain binary search tree and its operations. Make a binary search tree for the following sequence of numbers, show all steps: 45,32,90,34,68,72,15,24,30,66,11,50,10
- What are various operations performed in BST?

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## Unit 4: Graph and Trees

### Questions

- What is a graph? Describe various types of graph. Briefly explain few applications of graph.
- Discuss the various types of representation of graph.
- Write a note on graph traversal.
- Explain BFS graph traversal with example.
- Explain DFS graph traversal with example.
- Write the difference between BFS and DFS graph traversal.

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## Unit 5: Stack and Queue Most Asked Questions

### Questions

- What is stack? Explain with suitable example with all its application.
- Implement stack with singly linked list.
- What is push and pop operation of stack? Write the algorithm for push and pop operation.
- Write a program in C for array implementation of stack.
- Write a program in C for linked list implementation of stack.
- What is infix, prefix and postfix expression? Explain with example.
- Write down an algorithm to evaluate the infix expression.
- Write down an algorithm to evaluate the postfix expression.
- Write down an algorithm to evaluate the Prefix expression.
- Convert following infix expression into postfix expression A+(B*C+D)/E

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