Tata Infotech Previous Years Solved Sample Placement Papers

1. Which keyword is used to create an instance of a class?

   A: new

   B: return

   C: this

   D: create

   Ans: A

2. Which keyword is used to inherit the properties and methods from another class?

   A: import

   B: package

   C: extends

   D: implements

   Ans: C

3. Which keyword is used to refer to the current instance of a class?

   A: class

   B: this

   C: instance

   D: object

   Ans: B

4. Which keyword in Java is used for importing packages into a program?

   A: import

   B: package

   C: include

   D: requires

   Ans: A

5. What is the purpose of the "super" keyword in Java?

   A: To refer to the current object

   B: To invoke the superclass constructor or methods

   C: To create multiple instances of a class

   D: To hide data and methods within a class

   Ans: B

6. What is the purpose of the "this" keyword in Java?

   A: To refer to the superclass

   B: To create multiple instances of a class

   C: To hide data and methods within a class

   D: To refer to the current object

   Ans: D

7. What is the purpose of the "final" keyword in Java?

   A: To prevent the inheritance of a class

   B: To prevent overriding of a method

   C: To prevent modification of a variable's value

   D: All of the above

   Ans: D

8. Which of the following can be used to create a custom checked exception?

   A: Extending the Exception class

   B: Extending the Error class

   C: Extending the RuntimeException class

   D: None of the above

   Ans: A

9. Which of these is an unchecked exception?

   A: ClassNotFoundException

   B: SQLException

   C: IOException

   D: ArithmeticException

   Ans: D

10. Which keyword is used to manually throw an exception in Java?

    A: new

    B: throw

    C: throws

    D: Throwable

    Ans: B

11. Which of these classes is the superclass of all Exception and Error classes?

    A: Exception

    B: Error

    C: Throwable

    D: Object

    Ans: C

12. What does the finally block do?

    A: Catches any exception

    B: Executes whether an exception is thrown or not

    C: Executes only when an exception is thrown

    D: Executes only when an exception is not thrown

    Ans: B

13. Which keyword in Java is used for constant variables?

    A: const

    B: static

    C: constant

    D: final

    Ans: D

14. In Java, what is the primary purpose of the Thread class?

    A: File handling

    B: String operations

    C: Network operations

    D: Creating and executing threads

    Ans: D

15. Which method is used to start the execution of a thread?

    A: run()

    B: start()

    C: execute()

    D: go()

    Ans: B