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82+ curated questions with the same answer shape every time: quick recap, deep dive, pitfalls, and follow-ups. Coverage includes access modifiers, comparisons, exception handling, java syntax datatypes, and more.
Suggested path
Topics follow a teaching order. Each answer ends with a clear Next question control so you can move forward without hunting the list.
Core Java interview questions are the single most important section for every fresher interview. This module covers what every Java developer is expected to know on Day 1 — the four pillars of OOP (encapsulation, inheritance, polymorphism, abstraction), exception handling (checked vs unchecked, try-with-resources, custom exceptions), String immutability and the String pool, access modifiers, and the comparisons interviewers repeat in every session (== vs equals, abstract class vs interface, overloading vs overriding). Every answer is shaped around how you'd explain it in a 5-minute slot: headline, one-line why, a tiny code anchor, and the follow-up the interviewer is already composing.
Full catalog
Topics are ordered for learning. Within each topic, rows are numbered 1–82 globally so you always know where you are. Collapse topics if you want a lighter view — use Expand all when you need the full list again.
Numbers 1–82 follow the order we recommend — click any row to open the full answer, or use the sticky Next link at the bottom of each page to go Q1 → Q82.