v1.0 · 29 senior topics indexed

Walk into your next interview with senior-level confidence.

A keyboard-first knowledge base for backend, cloud and platform engineers. Java, Spring, Kubernetes, Azure, security, AI, system design, and STAR — all in one fast, searchable hub.

Browse knowledge base Press ⌘K to search

Topics reviewed

0 / 29

0% complete

High-frequency picks

Topics that come up in almost every senior interview

Java & Spring Boot/senior

Dependency Injection in Spring

Spring's IoC container wires collaborators at startup. Prefer constructor injection for required dependencies — it enables immutability, testability, and fail-fast wiring.

springiocbeans

Java & Spring Boot/senior

Transactions & @Transactional Pitfalls

@Transactional is a proxy-based AOP advice. Self-invocation, checked exceptions, and propagation defaults silently break what looks like correct code.

springjpatransactions

Java & Spring Boot/staff

JVM Tuning for Production

Pick the right GC, size the heap conservatively, and measure before tuning. Modern G1 / ZGC defaults are excellent — most 'tuning' is undoing bad flags.

jvmgcperformance

Java & Spring Boot/senior