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27+ curated questions with the same answer shape every time: quick recap, deep dive, pitfalls, and follow-ups. Coverage includes dependency injection, bean lifecycle, spring internals, custom components, 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.
Spring Core interviews test whether you understand the container, not just the annotations. This module is an elevation arc: it opens with dependency injection (the central idea — IoC, the types constructor/setter/field, the BeanFactory vs ApplicationContext container), then the bean lifecycle (the hooks interviewers probe). Spring internals and custom components follow at the mechanics tier, then AOP (proxies, pointcuts, advice) and Spring events. It closes with comparisons and scenario-based questions.
Full catalog
Topics are ordered for learning. Within each topic, rows are numbered 1–27 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 1–27 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 → Q27.
Interviewers rarely ask Spring Core & IoC in isolation. These are the modules that most often come up in the same loop.