Understand the Java platform, compilation flow, and the JVM internals that run Java bytecode.
Overview of the Java platform, compilation, and execution model.
Understand the JVM subsystems and how they execute Java bytecode.
Learn the memory areas used by the JVM during execution.
Understand how classes are loaded, linked, and initialized.
Understand how the JVM organizes heap, stack, metaspace, and thread-local memory regions during execution.
Learn how the JVM interprets and compiles bytecode to native machine instructions.
Explore the compiler strategies that improve Java performance at runtime.
Understand visibility, ordering, synchronization, and the guarantees across threads.
Trace how objects are created, initialized, reachability-checked, and eventually reclaimed.
Inspect how objects are laid out in memory and how the JVM represents them internally.
Study how the JVM finds unreachable objects and reclaims heap memory safely.
Compare collector algorithms and trade-offs across throughput, latency, and simplicity.
Understand remembered sets, barriers, concurrent phases, and region-based collection mechanics.
Learn how the JVM balances heap, stack, TLAB, direct memory, and native memory.
Understand how Java threads are scheduled, managed, and coordinated.
Inspect locking, monitor behavior, and atomic primitives used for safe threading.
Understand the structure of class files and how stack-based bytecode executes.
Explore runtime inspection and dynamic access to Java classes and members.
Learn how metadata is processed and used by the compiler and frameworks.
Understand how Java interacts with native code and platform libraries.
Tune JVM memory, GC, stack, and startup behavior for real-world workloads.
Use runtime tools to observe heap, threads, GC, and application health.
Diagnose the major JVM failures and performance problems seen in production.
Prepare for advanced JVM and runtime questions asked in senior Java interviews.