Quick study sessions to strengthen memory and retain key concepts.
When is G1GC preferred over ZGC?
When predictable pause times are needed with moderate heap sizes. G1GC is often chosen for applications where predictable…
View Card →Why does memory leaks on performance matter in practice?
Leads to increased memory usage and potential crashes. A memory leak, like unclosed database connections, gradually consumes more…
View Card →What's the purpose of a Thread Dump?
Provides snapshot of thread states. Frame the concept in practical terms so you can explain it during interview…
View Card →How do G1GC and ZGC differ in pause times?
ZGC aims for lower pause times than G1GC. Frame the concept in practical terms so you can explain…
View Card →How would you explain a Stop-The-World (STW) pause in an interview?
Halts application threads for GC. Frame the concept in practical terms so you can explain it during interview…
View Card →Why are static references a memory leak risk?
Static references prevent eligible objects from being GC'd. In your app, if a static Map stores user sessions…
View Card →Explain the Generational Garbage Collection model?
Divides Heap into Young and Old spaces for efficiency. Objects in Java are allocated in the Young Generation.…
View Card →How does a Heap Dump help in debugging?
Provides a complete memory snapshot for analysis. Heap Dumps can pinpoint areas of excessive memory usage. For instance,…
View Card →Why does Metaspace in JVM matter in this design?
Stores class metadata in Java 8 and later. Unlike the old PermGen, Metaspace grows dynamically, reducing OutOfMemoryErrors related…
View Card →Why does java.lang.OutOfMemoryError occur?
Occurs when JVM can't allocate memory for new objects. When your e-commerce site faces a surge on Black…
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