1-3 Years
Real interview questions with expert answers, plain-English explanations, and practical examples. (12 questions)
Wipro
DevOps Engineer
CI/CD
Walk through a blue-green deployment, and why does it reduce downtime risk?
IBM
Security Engineer
Security
JWT vs session-based authentication: what’s the real tradeoff, and when would you pick each?
HCL
QA Engineer
Testing
What causes flaky tests, and how do you systematically fix them instead of just re-running CI?
Capgemini
Frontend Developer
CSS
How would you debug a CSS layout that looks fine in Chrome but breaks in Safari?
Honeywell
Network Engineer
Networking
What’s the difference between TCP and UDP, and when would you choose each?
TCS
Linux Administrator
Linux
A production server’s disk is filling up. Walk through how you’d diagnose and fix it.
Cognizant
React Developer
React
What’s the difference between useMemo and useCallback, and when does each actually matter for performance?
Infosys
QA Engineer
Testing
What’s the difference between smoke, sanity, and regression testing, and when do you run each in a CI pipeline?
Wipro
Python Developer
Python
What is Python’s GIL, and when would you reach for multiprocessing instead of threading?
TCS
Java Developer
Java