Here you will find 20 MCQs on Components of Java.

MCQs on Components of Java

  1. Which component of Java is responsible for converting source code into bytecode? a) Java Compiler b) Java Virtual Machine (JVM) c) Java Runtime Environment (JRE) d) Java Development Kit (JDK) Answer: a) Java Compiler
  2. Which Java component contains the libraries and tools needed for Java development? a) Java Compiler b) Java Virtual Machine (JVM) c) Java Runtime Environment (JRE) d) Java Development Kit (JDK) Answer: d) Java Development Kit (JDK)
  3. The JVM is primarily responsible for: a) Compiling Java source code b) Running Java applications c) Developing Java applications d) Analyzing Java bytecode Answer: b) Running Java applications
  4. What does the JRE consist of? a) Only the JVM b) JVM and Java Compiler c) JVM and Java libraries d) JVM, Java libraries, and development tools Answer: c) JVM and Java libraries
  5. Which part of Java allows for writing platform-independent code? a) JVM b) JRE c) JDK d) Java Libraries Answer: a) JVM
  6. The main function of the class loader is to: a) Compile Java source code b) Verify bytecode c) Execute Java applications d) Manage memory allocation Answer: b) Verify bytecode
  7. What is the purpose of the garbage collector in Java? a) To deallocate memory for objects b) To manage compiler optimizations c) To optimize bytecode d) To load Java classes Answer: a) To deallocate memory for objects
  8. Which component of Java is responsible for managing and optimizing memory usage? a) Class Loader b) Bytecode Verifier c) Garbage Collector d) Just-In-Time Compiler (JIT) Answer: c) Garbage Collector
  9. Which part of Java allows you to create reusable software components? a) Java Compiler b) Java Virtual Machine (JVM) c) Java Runtime Environment (JRE) d) Java Libraries Answer: d) Java Libraries
  10. What does JIT compilation stand for? a) Just-In-Time Compilation b) Java-In-Transit Compiler c) Java Intermediate Translator d) Just-In-Time Converter Answer: a) Just-In-Time Compilation
  11. The process of converting Java source code into bytecode is called: a) Interpretation b) Compilation c) Execution d) Validation Answer: b) Compilation
  12. Which Java component is used to run Java applications without the need for compilation? a) JVM b) JRE c) JDK d) JIT Answer: b) JRE
  13. Which part of Java is responsible for dynamic memory allocation? a) JVM b) JRE c) JDK d) JIT Answer: a) JVM
  14. The standard library of classes and methods in Java is known as: a) Java Compiler b) Java Virtual Machine (JVM) c) Java Runtime Environment (JRE) d) Java API (Application Programming Interface) Answer: d) Java API (Application Programming Interface)
  15. The process of converting bytecode into machine-specific instructions is performed by: a) JVM b) JRE c) JDK d) JIT Answer: a) JVM
  16. Which Java component is required to compile and run Java programs? a) JVM b) JRE c) JDK d) JIT Answer: c) JDK
  17. Which Java component is responsible for loading classes into memory as they are referenced? a) Class Loader b) Bytecode Verifier c) Garbage Collector d) JIT Answer: a) Class Loader
  18. The process of verifying bytecode to ensure it doesn’t violate security constraints is performed by: a) JVM b) Class Loader c) Bytecode Verifier d) JIT Answer: c) Bytecode Verifier
  19. The term “Write Once, Run Anywhere” refers to Java’s ability to: a) Automatically optimize code b) Generate native machine code c) Compile code into multiple languages d) Execute code across different platforms Answer: d) Execute code across different platforms
  20. Which part of Java is responsible for optimizing code during runtime for better performance? a) JVM b) JRE c) JDK d) JIT Answer: d) JIT

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