Programmer1970

Dec 2, 2025 · Backend Development

Spring Boot Interview Series: 10 Core Questions (Part 2) – Why @Configuration Uses CGLIB Proxy

This article answers ten Spring Boot interview questions, covering why @Configuration classes are CGLIB‑proxied, common startup‑time bottlenecks and diagnostics, graceful shutdown mechanics, execution timing of ApplicationContextInitializer vs ApplicationRunner, circular‑dependency handling, health‑endpoint aggregation, distributed‑transaction strategies, Kubernetes probes, JSON serialization safeguards, and migration challenges to Jakarta EE 9+.