If you want to work as a Software Developer in companies like Infosys, Wipro, Cognizant, Accenture, Capgemini, HCLTech and Tata Consultancy Services.
These 7 companies hire more Java developers in a year than the entire Indian product ecosystem combined.
Different logos. Same interview.
Two technical rounds. One managerial. That is the whole loop for most experienced Java roles.
๐๐ข๐ฅ๐ ๐๐๐ฉ๐:
1. HashMap internal working. What happens when a bucket turns into a tree.
2. HashMap vs ConcurrentHashMap vs Hashtable.
3. equals and hashCode contract. Break it and watch your Set duplicate.
4. Why is String immutable.
5. Comparable vs Comparator.
6. Checked vs unchecked exceptions.
7. Can you override a static method.
8. try with resources.
9. Which Java 8, 11 and 17 features you have actually shipped.
๐ฆ๐ง๐ฅ๐๐๐ ๐ฆ:
10. Find duplicate strings in a list using Streams.
11. map vs flatMap.
12. Sort a map by value.
13. Optional. Where it actually saves you.
๐ ๐จ๐๐ง๐๐ง๐๐ฅ๐๐๐๐๐ก๐:
14. Runnable vs Callable.
15. ExecutorService and how you size a thread pool.
16. synchronized vs ReentrantLock.
17. volatile vs AtomicInteger.
18. Deadlock. How you detect it in a running JVM.
๐ฆ๐ฃ๐ฅ๐๐ก๐ ๐๐ข๐ข๐ง:
19. Spring vs Spring Boot.
20. How autoconfiguration works.
21. Component vs Service vs Repository.
22. How dependency injection resolves at startup.
23. Transactional. What rolls back on a checked exception.
24. ControllerAdvice and global exception handling.
25. Spring Security and the JWT flow.
๐ ๐๐๐ฅ๐ข๐ฆ๐๐ฅ๐ฉ๐๐๐:
26. How two services find each other.
27. What an API gateway actually does.
28. Circuit breaker. Why retries alone make the outage worse.
29. Tracing one request across five services.
๐ฆ๐ค๐ ๐๐ก๐ ๐๐๐๐๐ฅ๐ก๐๐ง๐:
30. When an index hurts instead of helps.
31. Find duplicate rows.
32. Second highest salary without LIMIT.
33. N plus 1 problem. How you kill it.
34. Lazy vs eager loading.
๐๐ข๐๐๐ก๐ ๐ฅ๐ข๐จ๐ก๐:
35. Move all zeroes to the end.
36. Check if two strings are anagrams.
37. Longest common prefix.
38. Missing number in a consecutive array.
๐ ๐๐ก๐๐๐๐ฅ๐๐๐:
39. Draw your project architecture end to end.
40. A production bug you owned.
41. Notice period and relocation.
Bulk hiring does not mean easy hiring. It means predictable hiring.
2August 24, 2026 1.1K 7
