Apoya a Pankaj Singh

Free Java interview prep used by developers everywhere.

I built this because I had the same problem. Every time an interview came up, I was all over the place. Five YouTube channels, three blogs, random Medium articles, half finished notes. Nothing covered everything. Nothing had a structure. I never actually got good at any one source because I kept jumping between all of them.

Every engineer goes through this. You use one site for Core Java, a different one for Spring, something else for System Design. Then the interviewer asks a follow up and you go blank because you never went deep enough in any single place.

javabypankaj is the one resource I wish I had when I started. It covers fresher to architect level. Core Java to System Design. Short answers when you need quick recall. Long answers with real code, edge cases, and comparison tables when they push you deeper. One place for your whole career.

No ads. No paywall. No login. Just the content.

I build and maintain this by myself. A coffee helps me keep it free for everyone.