The following section contains 30 multiple-choice questions (MCQs) related to the Java Virtual Machine (JVM).

30 MCQs on JVM

  1. What does JVM stand for? a) Java Virtual Model b) Java Virtual Memory c) Java Virtual Machine d) Java Verification Mechanism
  2. Which component of the JVM is responsible for converting bytecode into machine-specific instructions? a) Class Loader b) Bytecode Verifier c) Just-In-Time Compiler (JIT) d) Garbage Collector
  3. What programming languages are primarily executed on the JVM? a) Java only b) Python and Ruby c) C++ and C# d) Java, Kotlin, and Scala
  4. The JVM provides which type of memory for objects that are short-lived and can be quickly reclaimed? a) Stack memory b) Heap memory c) Native memory d) Permanent memory
  5. Which JVM component is responsible for managing and optimizing memory usage? a) Class Loader b) Bytecode Verifier c) Garbage Collector d) Just-In-Time Compiler (JIT)
  6. Which memory area of the JVM stores class-level information, such as methods and fields? a) Stack b) Heap c) Method Area d) Native Area
  7. Which phase of JVM’s execution is responsible for verifying that the bytecode doesn’t violate security and memory constraints? a) Loading b) Verification c) Execution d) Initialization
  8. The process of converting a class file into machine-readable bytecode is known as: a) Compilation b) Interpretation c) Decompilation d) Bytecode Generation
  9. What is the purpose of the Just-In-Time (JIT) compiler in the JVM? a) To compile Java source code b) To translate bytecode into machine code c) To manage memory allocation d) To load classes dynamically
  10. Which garbage collection algorithm focuses on dividing the heap into multiple generations and collecting garbage from the most short-lived objects first? a) Mark-and-Sweep b) Generational c) Reference Counting d) Tracing Collector
  11. In the context of JVM, what does OOM stand for? a) Object-Oriented Memory b) Out Of Method c) Out Of Memory d) Overridden Object Management
  12. Which method allows an object to clean up resources before being garbage collected? a) finalize() b) clean() c) dispose() d) cleanup()
  13. Which tool is commonly used to analyze JVM memory usage and troubleshoot memory-related issues? a) JAR Analyzer b) Bytecode Inspector c) Heap Profiler d) Stack Debugger
  14. Which memory area is used to store local variables and partial results of method calls? a) Heap b) Method Area c) Native Area d) Stack
  15. The PermGen space in older versions of JVM was replaced by which memory space in newer versions? a) Stack b) Heap c) Method Area d) Metaspace
  16. Which JVM parameter is used to define the initial size of the heap? a) -Xmx b) -Xms c) -Xss d) -Xstart
  17. The process of loading necessary classes and resources into memory before execution is performed by: a) Bytecode Verifier b) Class Loader c) JIT Compiler d) Garbage Collector
  18. Which type of class loading mechanism is used in the JVM to load classes on demand? a) Lazy Loading b) Eager Loading c) Dynamic Loading d) Static Loading
  19. Which memory area of the JVM stores references to objects and arrays? a) Stack b) Heap c) Method Area d) Native Area
  20. Which bytecode instruction is used for branching and looping within methods? a) invokevirtual b) ifeq c) new d) getfield
  21. Which bytecode instruction is used to create a new instance of a class? a) new b) invokestatic c) instanceof d) invokevirtual
  22. Which garbage collection algorithm focuses on tracing object references to identify and collect unreachable objects? a) Reference Counting b) Generational c) Tracing Collector d) Mark-and-Sweep
  23. What happens during the initialization phase of JVM execution? a) The bytecode is translated into machine code. b) Memory is allocated for objects and variables. c) Security checks are performed on the loaded classes. d) The main method is invoked.
  24. Which memory area of the JVM holds the runtime constant pool, field and method data, and method bytecode? a) Heap b) Method Area c) Native Area d) Stack
  25. Which flag is used to set the maximum heap size for the JVM? a) -Xms b) -Xmx c) -Xss d) -Xmn
  26. Which tool is used to monitor and manage JVM applications in real time? a) Java Visualizer b) JVM Monitor c) Bytecode Inspector d) Memory Analyzer
  27. Which bytecode instruction is used to return a value from a method? a) new b) putfield c) return d) instanceof
  28. What is the purpose of the method area in the JVM? a) Storing object instances b) Storing local variables c) Storing class-level information d) Storing method arguments
  29. Which JVM component is responsible for loading classes and resources from the file system or network? a) Bytecode Verifier b) Class Loader c) JIT Compiler d) Garbage Collector
  30. Which memory area of the JVM is used for managing method invocation and returning values? a) Heap b) Method Area c) Native Area d) Stack

Answers

  1. c) Java Virtual Machine
  2. c) Just-In-Time Compiler (JIT)
  3. d) Java, Kotlin, and Scala
  4. a) Stack memory
  5. c) Garbage Collector
  6. c) Method Area
  7. b) Verification
  8. d) Bytecode Generation
  9. b) To translate bytecode into machine code
  10. b) Generational
  11. c) Out Of Memory
  12. a) finalize()
  13. c) Heap Profiler
  14. d) Stack
  15. d) Metaspace
  16. b) -Xms
  17. b) Class Loader
  18. a) Lazy Loading
  19. a) Stack
  20. b) ifeq
  21. a) new
  22. c) Tracing Collector
  23. c) Security checks are performed on the loaded classes.
  24. b) Method Area
  25. b) -Xmx
  26. b) JVM Monitor
  27. c) return
  28. c) Storing class-level information
  29. b) Class Loader
  30. d) Stack

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