Java Interview - Advanced Level
For senior developers with 4+ years of Java experience. Master JVM internals, garbage collection, concurrency, microservices, performance tuning, and enterprise architecture.
35-45 minutes
4+ years of Java experience
Who is this for?
Senior Java engineers
Technical leads and architects
Backend engineers at scale
Those preparing for senior/staff roles
What you'll practice
Understanding JVM internals
Tuning garbage collection
Advanced concurrency patterns
Architecting microservices
Optimizing Java performance
Designing enterprise systems
Topics covered
JVM Internals
Memory management
Garbage collection algorithms
Class loading
JVM tuning
Advanced Concurrency
ReentrantLock, Semaphore
ConcurrentHashMap internals
Fork/Join framework
CompletableFuture
Microservices
Spring Cloud
Service discovery
Circuit breakers
API Gateway patterns
Performance
Profiling and monitoring
Memory leak detection
Query optimization
Caching strategies
Example questions
Q:
Explain how garbage collection works in the JVM
Q:
How does ConcurrentHashMap achieve thread-safety?
Q:
What are the trade-offs between different GC algorithms?
Q:
How would you design a high-throughput microservices system?
Q:
How do you identify and fix memory leaks in Java?
Q:
What is the Java memory model?
Preparation tips
Study JVM internals deeply
Learn GC algorithms and tuning
Master advanced concurrency
Practice microservices design
Learn profiling tools
Understand performance optimization
Continue your journey
Free • No signup required • AI-powered