JAVA MCQs with answers Page - 25

Dear candidates you will find MCQ questions of JAVA here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Share your questions by clicking Add Question

📊 JAVA
Q. What are the pillars of OOPS concept?
  • (A) Abstraction, Inheritance, Encapsulation, Polymorphism
  • (B) Atomicity, Inheritance, Encapsulation, Polymorphism
  • (C) Abstraction, Inheritance, Polymorphism
  • (D) None of the Above
💬 Discuss
✅ Correct Answer: (A) Abstraction, Inheritance, Encapsulation, Polymorphism
📊 JAVA
Q. What is the default buffer size used by any buffered class?
  • (A) 128 bytes
  • (B) 256 bytes
  • (C) 512 bytes
  • (D) 1024 bytes
💬 Discuss
✅ Correct Answer: (C) 512 bytes
📊 JAVA
Q. Which class cannot be a subclass in java
  • (A) Abstract class
  • (B) Parent class
  • (C) Final class
  • (D) None of above
💬 Discuss
✅ Correct Answer: (C) Final class
📊 JAVA
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
💬 Discuss
✅ Correct Answer: (B) Can store multiple values
📊 JAVA
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
💬 Discuss
✅ Correct Answer: (A) Method overloading
📊 JAVA
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.
💬 Discuss
✅ Correct Answer: (A) Copy of argument is made into the formal parameter of the subroutine.
📊 JAVA
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
💬 Discuss
✅ Correct Answer: (D) Recursion
📊 JAVA
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
💬 Discuss
✅ Correct Answer: (C) Finalize() method is called when a object goes out of scope and is no longer need
📊 JAVA
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
💬 Discuss
✅ Correct Answer: (B) NULL
📊 JAVA
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.
💬 Discuss
✅ Correct Answer: (A) Every class must contain a main() method.

Programming Categories

📱 Download Our App

Learn MCQs on the go with our easy-to-use Android app

Get it on Google Play