Question 1

Which statement best describes encapsulation?

Options :

A : Encapsulation ensures that classes can be designed so that only certain fields and methods of an object are accessible from other objects

B : Encapsulation ensures that classes can be designed so that their methods are inheritable.

C : Encapsulation ensures that classes can be designed with some fields and methods declared as abstract.

D : Encapsulation ensures that classes can be designed so that if a method has an argument MyType x, any subclass of MyType can be passed to that method

Answer: A

Question 2

Given the code fragment:

What is the result?

Options :

A : [JavaForum, ExpertForum]

B : [JavaGroup, ExpertGroup]

C : [JavaForumGroup, ExpertForumGroup]

D : [JavaGroup, TechGroup ExpertGroup]

Answer: B

Question 3

Given:

and the code fragment:

What is the result?

Options :

A : AC

B : BD

C : BC

D : AD

Answer: C

Question 4

Given:

What is the result?

Options :

A : An exception is thrown at runtime.

B :

Initialized

Started

Initialized

C :

Initialized

Started

D : Compilation fails.

Answer: D

Question 5

Consider below code:

1. package com.udayan.oca;

2.

3. public class Test {

4. public static void main(String[] args) {

5. StringBuilder sb = new StringBuilder();

6. try {

7. for(;;) {

8. sb.append("OCA");

9. }

10. } catch(Exception e) {

11. System.out.println("Exception!!!");

12. }

13. System.out.println("Main ends!!!");

14. }

15. }

What will be the result of compiling and executing Test class?

Options :

A : "Exception!!!" is printed on to the console and program terminates abruptly

B : "Exception!!!" is printed on to the console and program terminates successfully

C : "Exception!!!" and "Main ends!!!" are printed on to the console and program terminates successfully

D : Program terminates abruptly

E : "Main ends!!!" is printed on to the console and program terminates successfully

Answer: D

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