OCPJP 6 Mock Exam -19

1 . What will be the output?

[code lang=”java”]
public class Test1{
private static int i = 10;
static class Inner extends Test1{
int i;
public void method(){
System.out.println(i);
}
}
public static void main(String args[]){
new Test10.Inner().method();
}
}
[/code]

Choose the one below:

1. 10
2. 0
3. Nothing is printed
4. Compiler error

2 . which of the following modifiers are applied to the nested classes class?

1. private
2. protected
3. public
4. static
5. All the above

3 . which of the following modifiers are applied to the top level classes?

1. static
2. private
3. strictfp
4. abstract
5. All the above

4 . which modifer is uesd to stop overridding a method?

1. final
2. static
3. abstract
4. None of the above

5 . What will be the output?

[code lang=”java”]
public abstract final class Test5{
public static void main(String args[]){
System.out.println("Modifiers");
}
}
[/code]

Choose the one below:

1. Modifiers
2. Compiler error
3. Exception thrown at runtime
4. None of the above

6 . which of the following are valid syntax for a toplevel class?

1. public static class Test6{}
2. public abstrct class Test6{}
3. private final class Test6{}
4. public final class Test6{}

7 . which of the following are valid syntax for nested classes?

1. private final abstract class Test7{}
2. private final class Test7{}
3. private static class Test7{}
4. protected abstract class Test7{}

8 . What will be the output?

[code lang=”java”]
public class Test8{
class Inner{
public void method(){
System.out.println("Inner class");
}
}
public static void main(String args[]){
// ?
}
}
[/code]

Choose the one below:

1. new Test8.Inner().method();
2. new Test8().Inner().method();
3. new Test8.Inner.method();
4. Compiler error

9 . What will be the output?

[code lang=”java”]
public class Test9{
static class Inner{
public void method(){
System.out.println("Inner class");
}
}
public static void main(String args[]){
// ?
}
}
[/code]

Choose the one below:

1. new Test9.Inner().method();
2. new Test9().Inner().method();
3. new Test9.Inner.method();
4. Compiler error

10 . which of the following modifiers are applied to local classes(classses inside method)?

1. private
2. public
3. protected
4. None of the above

Answers

1 : 3 is correct.

2 : 5 is correct. All the above.

3 : 3 & 4 is correct.
3 . strictfp
4 . abstract

4 : 1 is correct. final.

5 : 2 is correct. Compiler error.

6 : 2 & 4 is correct.
2 . public abstrct class Test6{}
4 . public final class Test6{}

7 : 2,3 & 4 is correct.
2 . private final class Test7{}
3 . private static class Test7{}
4 . protected abstract class Test7{}

8 : 4 is correct. Compiler error.

9 : 1 is correct. new Test9.Inner().method();.

10 : 4 is correct. None of the above.