Set X

Multiple Choice Question

QID: 
45

Given interface Inter

interface Inter {
	
	void myMethod();
}

Which all implementations are valid?

A.

abstract class MyAbstract implements Inter{

    public abstract void myMethod();
}

B.

abstract class MyAbstract1 implements Inter{

    abstract void myMethod();
}

C.

abstract class MyAbstract2 implements Inter{

    void myMethod();
}

D.

abstract class MyAbstract3 implements Inter{

    void myMethod() {}
}

E.

abstract class MyAbstract4 implements Inter{

    public void myMethod() {}
}

F.

abstract class MyAbstract5 implements Inter{

    public abstract void myMethod() {}
}

G.

abstract class MyAbstract implements Inter{

    @Override
    public abstract void myMethod();
}

 

Descriptive Question

QID: 
44

Find output:

public class MyClass {

  int id;

  public static void main(String[] args) throws Exception {

    MyClass mc = new MyClass();

    mc.id=10;

    System.out.println(((MyClass)mc.clone()).id);

  }

}

 

Descriptive Question

QID: 
43

Find output:

public class MyClass {

  int id;

  public static void main(String[] args) throws Exception {

    MyClass mc = new MyClass();

    mc.id=10;

    System.out.println(mc.clone().id);

  }

}

 

Multiple Choice Question

QID: 
42

Which of the following for statements are valid?

A.

for(;;){}

B.

for(int i;;){}

C.

for(int i;;i++){}

D.

for(int i=0;;i++){}

E.

int i = 0;
for(;;i++){}

F.

for(;true;){}

G.

for(int i=0;true;i++);

 

Descriptive Question

QID: 
41

Find output or error:

public class NullCheck {

public void myMethod(String str) {

System.out.println("String");

}

public void myMethod(Double d) {

System.out.println("Double");

}

public static void main(String[] args) {

NullCheck nc = new NullCheck();

nc.myMethod(null);

}

}

 

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