Java / Quarkus Interview questions
What are the key features of Quarkus?
Quarkus bundles together a set of features aimed squarely at cloud-native Java development, distinguishing it from older application-server-centric frameworks.
| Feature | What it Provides |
| Fast startup | Milliseconds in native mode, well under a second in JVM mode |
| Low memory footprint | Smaller RSS per instance, useful for dense container packing |
| Live coding (Dev Mode) | Code changes reflected instantly without a manual restart |
| Unified imperative & reactive | Same programming model for blocking and non-blocking code |
| Extension ecosystem | Curated integrations for messaging, data access, security, and more |
| Native compilation | GraalVM-based native executables for extreme startup/footprint gains |
Together these features are why Quarkus is often described as being built for "supersonic subatomic" Java — the emphasis throughout is minimizing what has to happen after the container starts.
What does Quarkus's Dev Mode provide?
What programming models does Quarkus unify under one API?
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