Newgen Placement Paper -: Java Questions With Answers

Newgen Previous Years Solved Sample Placement Papers

1. What is the method available for setting the priority?

   A: setPriority()

   Ans: setPriority()

2. What is the default thread at the time of starting the program?

   A: main thread

   Ans: main thread

3. The word synchronized can be used with only a method. True/False

   A: False

   Ans: False

4. What are all the four states associated in the thread?

   A: 1. new 2. runnable 3. blocked 4. dead

   Ans: 1. new 2. runnable 3. blocked 4. dead

5. The suspend() method is used to terminate a thread. True/False

   A: False

   Ans: False

6. The run() method should necessarily exist in classes created as subclass of thread. True/False

   A: True

   Ans: True

7. Garbage collector thread belongs to which priority?

   A: low-priority

   Ans: low-priority

8. What is the difference between superclass & subclass?

   A: A superclass is a class that is inherited whereas subclass is a class that does the inheriting.

   Ans: A superclass is a class that is inherited whereas subclass is a class that does the inheriting.

9. Which keyword is used to inherit a class?

   A: extends

   Ans: extends

10. Object class is a superclass of all other classes? True/False

    A: True

    Ans: True

11. Java supports multiple inheritance? True/False

    A: False

    Ans: False

12. What is inheritance?

    A: Deriving an object from an existing class. In other words, inheritance is the process of inheriting all the features from a class.

    Ans: Deriving an object from an existing class. In other words, inheritance is the process of inheriting all the features from a class.

13. What are the advantages of inheritance?

    A: Reusability of code and accessibility of variables and methods of the superclass by subclasses.

    Ans: Reusability of code and accessibility of variables and methods of the superclass by subclasses.

14. Which methods are used to destroy the objects created by the constructor methods?

    A: finalize()

    Ans: finalize()

15. What are abstract classes?

    A: Abstract classes are those for which instances can’t be created.

    Ans: Abstract classes are those for which instances can’t be created.

16. What must a class do to implement an interface?

    A: It must provide all of the methods in the interface and identify