25 common IT interview questions commonly asked.

Certainly, here is a compilation of 25 common IT interview questions. Keep in mind that the actual questions you encounter may vary depending on the specific role, company, and industry. It’s important to prepare for a range of technical and behavioral questions.

General/Behavioral Questions:

1. **Can you walk me through your resume and highlight your key skills and experiences?
2. Why are you interested in working for our company?
3. What motivates you to pursue a career in IT?
4. Describe a challenging project you’ve worked on. How did you overcome obstacles?
5. How do you stay updated with the latest technology trends in the IT industry?
6. Can you provide an example of a time when you successfully worked in a team?
7. Describe a situation where you had to resolve a conflict with a team member.
8. How do you handle tight deadlines and multiple priorities?
9. What do you enjoy most about working in IT?
10. Where do you see yourself in 5 years?

Technical Questions:

11. Explain the difference between a stack and a queue.
12. What is the difference between HTTP and HTTPS?
13. Can you explain the concept of virtualization?
14. Describe the OSI model and its seven layers.
15. What is the purpose of DNS, and how does it work?
16. Explain the difference between TCP and UDP.
17. What is the role of a firewall in network security?
18. How do you troubleshoot a slow-performing website?
19. What is the significance of the 404 HTTP status code?
20. Can you explain the concept of OOP (Object-Oriented Programming)?

Programming/ Coding Questions:

21. Write a program to find the Fibonacci sequence in your preferred language.
22. Implement a function to reverse a string without using library functions.
23. Explain the concept of pointers in programming.
24. Write a SQL query to retrieve data from two related tables.
25. What is the difference between a process and a thread?

Remember, in addition to technical knowledge, interviewers often look for problem-solving skills, communication abilities, and cultural fit. Tailor your responses to showcase both your technical expertise and your interpersonal skills. It’s also beneficial to research the specific technologies and methodologies relevant to the company you’re interviewing with. Good luck!