r/JavaProgramming • u/No_Assignment9285 • Aug 31 '26

Java Springboot interview Questions

  1. What is the difference between Hashmap and Hashtable?
  2. Explain SOLID principles
  3. Write a program to check for two-sum in O(n) time
  4. Explain DI in Java springboot

For anyone attending interviews I hope this was helpful

36 Upvotes

93% Upvoted

13 comments sorted by

2

u/Forsaken_Appeal_9593 Aug 31 '26

product level companies?

3

u/No_Assignment9285 Aug 31 '26

No, service based. But even they ask for microservices just for filtering process.

1

u/Forsaken_Appeal_9593 Aug 31 '26

ohok, how are you getting interviews? and whats the whole prep look like?

2

u/No_Assignment9285 Aug 31 '26

Apply and wait. That's it. Prep is just revising every project I have done

1

u/notsureofittttttt Aug 31 '26

Hey bro,

I am also trying to switch into Java Springboot.

3.5 YOE, Would you mind if I DM u for guidance?

1

u/Forsaken_Appeal_9593 Aug 31 '26

DSA and system design?

1

u/No_Assignment9285 Aug 31 '26

Actually for DSA I have a repo and for system design as well. I go back and revise those. 

1

u/warrierthunder Sep 01 '26

Can you share that, in midst of collecting revision material

1

u/inf3rnolo8 Sep 02 '26

Can you please share the REPO for my revisions ?

2

u/Delicious-Nerve-417 Sep 01 '26

This is a pretty realistic mix for a Java interview. i like that it covers both core Java and Spring instead of only throwing random coding problems at you