💼 15 Technical Interview Questions for Freshers with Answers

Preparing for a technical interview as a fresher can feel challenging, especially when you’re just starting your career. Interviewers don’t expect you to know everything — they mainly want to see how you think, solve problems, and apply your basic knowledge.

15 Technical Interview Questions for Freshers with Answers
15 Technical Interview Questions for Freshers with Answers

To help you feel confident, here are 15 commonly asked technical interview questions for freshers with clear and simple answers.

1. What is the difference between C and C++?

Answer:
C is a procedural programming language, while C++ supports object-oriented programming.
C++ introduces concepts like classes, inheritance, and polymorphism, which are not available in C.

2. What is an Object-Oriented Programming (OOP) language?

Answer:
OOP focuses on using objects that contain both data and functions. The main pillars of OOP are Encapsulation, Inheritance, Polymorphism, and Abstraction.

3. What is a Database?

Answer:
A database is an organized collection of data that can be easily accessed, managed, and updated. Common databases include MySQL, Oracle, MongoDB, and PostgreSQL.

4. What is the difference between SQL and NoSQL?

Answer:

  • SQL: Structured query language; used for relational databases (tables, rows, columns).

  • NoSQL: Used for unstructured data (JSON, documents, key-value pairs). Ideal for scalability and flexibility.

5. What is a Primary Key?

Answer:
A Primary Key uniquely identifies each record in a database table. It cannot be null or duplicated.

6. What is an Operating System (OS)?

Answer:
An Operating System is system software that manages computer hardware, software, and resources. Examples include Windows, Linux, and macOS.

7. What is the difference between Compiler and Interpreter?

Answer:

  • Compiler: Translates the entire code into machine language at once.

  • Interpreter: Translates code line by line during execution.

8. What is a Data Structure?

Answer:
A data structure is a way of organizing data efficiently for easy access and modification. Common examples are arrays, stacks, queues, linked lists, and trees.

9. What is the difference between Stack and Queue?

Answer:

  • Stack: Follows LIFO (Last In, First Out).

  • Queue: Follows FIFO (First In, First Out).

Stacks are used in recursion; queues are used in scheduling and buffering.

10. What is Cloud Computing?

Answer:
Cloud computing delivers storage, servers, databases, and software over the internet. Popular platforms include AWS, Google Cloud, and Microsoft Azure.

11. What is Version Control?

Answer:
Version control helps track and manage changes to code. Git is the most popular system, and GitHub is a cloud platform to host repositories.

12. What is the difference between Front-end and Back-end development?

Answer:

  • Front-end: Deals with the visual interface (HTML, CSS, JavaScript).

  • Back-end: Handles logic, databases, and server-side operations (Python, Node.js, PHP).

13. What is an API?

Answer:
An API (Application Programming Interface) allows two applications to communicate. For example, when an app uses Google Maps, it accesses the Maps API.

14. What is a Framework?

Answer:
A framework provides a ready-made structure for building applications. Examples: Django (Python), React (JavaScript), Spring Boot (Java).

15. Explain the Software Development Life Cycle (SDLC).

Answer:
SDLC is the process used to design, develop, and test software.
The main stages are Planning → Analysis → Design → Development → Testing → Deployment → Maintenance.

🧠 Bonus Tip: How to Prepare for Technical Interviews

  • Review core subjects (DBMS, OS, OOPs, Networking).

  • Practice coding on platforms like LeetCode, HackerRank, and GeeksforGeeks.

  • Be clear and concise in your answers — interviewers prefer understanding over memorization.

  • Prepare a few real project examples or college assignments to discuss.

🌟 Final Thoughts

Cracking a technical interview as a fresher is all about clarity, confidence, and curiosity.
Focus on fundamentals, stay calm under pressure, and show that you’re eager to learn.

Remember, companies don’t just hire skills — they hire potential. With preparation and persistence, your dream tech job is closer than you think. 🚀

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