Top IT Interview Questions and Answers Every Candidate Should Know
Wesley Ennis 
Whether you’re applying for a developer, system administrator, or cloud engineer position, being ready for the most common IT interview questions can give you a huge advantage. The following top IT interview questions and answers will help you prepare, boost your confidence, and make a lasting impression.
1. What is Cloud Computing?
Answer: Cloud computing is the delivery of computing services—like storage, databases, networking, and software—over the internet (“the cloud”). Popular providers include AWS, Azure, and Google Cloud.
2. Explain the Difference Between HTTP and HTTPS.
Answer: HTTP (Hypertext Transfer Protocol) transfers data between a browser and a website. HTTPS is the secure version, using SSL/TLS encryption to protect data during transmission.
3. What is Version Control and Why is it Important?
Answer: Version control systems like Git track changes in code, making collaboration easier and enabling developers to revert to previous versions when needed.
4. Define DevOps.
Answer: DevOps is a set of practices that combines software development (Dev) and IT operations (Ops) to shorten development cycles and deliver high-quality software continuously.
5. What is a Database Index?
Answer: An index improves the speed of data retrieval in a database. It works like a table of contents, allowing the system to locate data faster.
6. Explain Docker in Simple Terms.
Answer: Docker is a containerization platform that packages applications and their dependencies into containers, ensuring consistent performance across environments.
7. How Does DNS Work?
Answer: DNS (Domain Name System) translates human-friendly domain names into IP addresses so computers can identify each other over the internet.
8. What is Two-Factor Authentication (2FA)?
Answer: 2FA adds an extra layer of security by requiring two forms of verification, such as a password and a one-time code sent to your phone.
? Want to master these questions and more? Use IT interview flashcards to learn faster and remember better. With IT Flashcards, you can practice hundreds of Q&A sets across 30+ tech topics anytime, anywhere—even on the go with the mobile app.
