Question from go4java mock

[Leandro Melo]

Which one of the following methods will give you an error when placed at
line no.10? Select one correct answer.

1   class A
2   {
3      public void callme()
4      { 
5         System.out.println("A");
6      }      
7   }
8   class B extends A 
9   {
10     //Here
11  }

Options for answer:
1. public final void callme(){}
2. void callMe(){}
3. void callme(int a){}
4. void callme(){}


None of this options generated an error in my jdk (1.4). Can anyone clearify this to me?

[ramaseshan T]

1. public final void callme(){}
2. void callMe(){}
3. void callme(int a){}
4. void callme(){}


None of this options generated an error in my jdk (1.4). Can anyone clearify this to me?

1. Way to override callme method - No compiler error
2. Note "M" in callMe - It is a overloaded method - No error
3. Again it is perfect overloading - No error
4. Generates compiler error in JDK 1.4 - since it is declared with lesser access previleges

Please correct me if I am wrong...

[ankur rathi]

Originally posted by ramaseshan T:


2. Note "M" in callMe - It is a overloaded method - No error
Please correct me if I am wrong...

It is not overloading method , it is whole together new method .
everything else is right .

[Charles Chen]

Originally posted by Leandro Melo:
Which one of the following methods will give you an error when placed at
line no.10? Select one correct answer.

1   class A
2   {
3      public void callme()
4      { 
5         System.out.println("A");
6      }      
7   }
8   class B extends A 
9   {
10     //Here
11  }

Options for answer:
1. public final void callme(){}
2. void callMe(){}
3. void callme(int a){}
4. void callme(){}


None of this options generated an error in my jdk (1.4). Can anyone clearify this to me?

I will say no.4. I think it is not a overload method nor override method.

[Carol Enderlin]

#4 gives compiler error for me:

C:\_Work\java>javac A.java
A.java:10: callme() in B cannot override callme() in A; attempting to assign weaker access privileges; was public
void callme(){}
^
1 error

C:\_Work\java>java -version
java version "1.4.1_05"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_05-b01)
Java HotSpot(TM) Client VM (build 1.4.1_05-b01, mixed mode)

[Kedar Dravid]

The answer to the question is option no.4, because we are trying to override the callme() method with a weaker access privilege. Period.

[Leandro Melo]

Sorry, of course it generates a error. I tested it wrong.
Thanks.