JAVA TEST-1

Who is known as the "Father of Java"?

• a) Dennis Ritchie
  

• b) Bjarne Stroustrup
  

• c) James Gosling
  

• d) Guido van Rossum

Which of the following is NOT a principle of OOP?

• a) Encapsulation
  

• b) Polymorphism
  

• c) Compilation
  

• d) Inheritance

What is a class in Java?

• a) A blueprint for creating objects
  

• b) An object itself
  s

• c) A primitive data type
  

• d) A reserved keyword

What is an object in Java?

• a) A variable
  

• b) An instance of a class
  

• c) A data type
  

• d) A function

What is the file extension of Java bytecode files generated after compilation?

• a) .java
  

• b) .class
  

• c) .exe
  

• d) .byte

What does JVM stand for?

• a) Java Visual Manager
  

• b) Java Virtual Machine
  

• c) Java Variable Manager
  

• d) Java Version Module

JVM converts bytecode into machine code with the help of which process?

• a) Garbage collection
  

• b) Just-In-Time (JIT) compilation
  

• c) Bytecode loading
  

• d) Static linking

How do you create a Scanner object to read input from the keyboard?

• a) Scanner sc = new Scanner(System.console());
  

• b) Scanner sc = new Scanner(System.in);
  

• c) Scanner sc = new Scanner(System.out);
  

• d) Scanner sc = new Scanner(System.err);

Which method of the Scanner class is used to read an integer?

• a) nextInt()
  

• b) next()
  

• c) nextLine()
  

• d) nextFloat()

What is data abstraction in Java?

• a) Hiding implementation details and showing only essential features
  

• b) Hiding all details, including essential features
  

• c) Direct access to all data members of a class
  

• d) None of the above