Java MCQs with answers Page - 25

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Q. Why we use array as a parameter of main method

  • (A) It is syntax
  • (B) Can store multiple values
  • (C) Both of above
  • (D) None of above

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Q. What is process of defining two or more methods within same class that have same name but different parameters declaration?

  • (A) Method overloading
  • (B) Method overriding
  • (C) Method hiding
  • (D) None of the mentioned

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Q. Which of these is correct about passing an argument by call-by-value process?

  • (A) Copy of argument is made into the formal parameter of the subroutine.
  • (B) Reference to original argument is passed to formal parameter of the subroutine.
  • (C) Copy of argument is made into the formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument.
  • (D) Reference to original argument is passed to formal parameter of the subroutine and changes made on parameters of subroutine have effect on original argument.

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Q. What is the process of defining a method in terms of itself that is a method that calls itself?

  • (A) Polymorphism
  • (B) Abstraction
  • (C) Encapsulation
  • (D) Recursion

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Q. Which of the following statements are incorrect?

  • (A) Default constructor is called at the time of declaration of the object if a constructor has not been defined.
  • (B) Constructor can be parameterized.
  • (C) Finalize() method is called when a object goes out of scope and is no longer need
  • (D) None of the above

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Q. What is the stored in the object obj in following lines of code? box obj;

  • (A) Memory address of allocated memory of object.
  • (B) NULL
  • (C) Any arbitrary pointer
  • (D) Garbage

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Q. Which of this statement is incorrect?

  • (A) Every class must contain a main() method.
  • (B) Applets do not require a main() method at all.
  • (C) There can be only one main() method in a program.
  • (D) main() method must be made public.

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Q. Which of the following statements is correct?

  • (A) Public method is accessible to all other classes in the hierarchy
  • (B) Public method is accessible only to subclasses of its parent class
  • (C) Public method can only be called by object of its class.
  • (D) Public method can be accessed by calling object of the public class.

A

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Q. Program which executes applet is known as

  • (A) applet engine
  • (B) virtual machine
  • (C) JVM
  • (D) None of above

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Q. You read the following statement in a Java program that compiles and executes. submarine.dive(depth); What can you say for sure?

  • (A) Depth must be an int
  • (B) Dive must be a method.
  • (C) Dive must be the name of an instance fie
  • (D) None of the above

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