Question 1

Consider below code:

1. //Test.java

2. package com.udayan.oca;

3.

4. public class Test {

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

6. StringBuilder sb = new StringBuilder(100);

7. System.out.println(sb.length() + ":" + sb.toString().length());

8. }

9. }

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

Options :

A : 16:0

B : 0:0

C : 16:16

D : 100:0

E : 100:100

Answer: B

Question 2

What is the signature of special main method?

Options :

A : public static void main(String args) {}

B : public static void main() {}

C : private static void main(String [] args) {}

D : public static void main(String [] a) {}

Answer: D

Question 3

Given the code fragment:

What is the result?

Options :

A : Compilation fails

B : The program compiles, but it prints nothing.

C : HiHowAreYou removed

D : An UnsupportedOperationException is thrown at runtime

Answer: C

Question 4

Which two statements are true? (Choose two.)

Options :

A : Error class is unextendable

B : Error class is extendable.

C : Error is a RuntimeException.

D : Error is an Exception.

E : Error is a Throwable.

Answer: A,B

Question 5

Examine the content of App.java:

Which is true?

Options :

A : The App.class file is stored within the p1 folder. The Test.class file is stored within the p2 sub-folder of p1.

B : The App class is accessible within the Test class without an import statement.

C : import p1.App; is used to access the App class within the Test class.

D : It is optional to have the package statement as the first line of class definitions

Answer: C

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