void waitForSignal() {

Object obj = new Object();

synchronized (Thread.currentThread()) {

obj.wait();

obj.notify();

}

}

Which statement is true?

If constructor opens the file 

finalize() method closes that file.

If constructor opens the connection 

finalize() method closes that connection.

To perform finalization operation we must overriding finalize method.

we can override tostring() method to return String representation of our object data

Final method is a method defined in the super class with final modifier.

We cannot overriding final method of super class in the sub class.

EX:

 Class Sample {

   final void funOne() {

   }

   void funTwo() {

   }

}

Class Sub extends Sample {

  void funOne() { // overriding is not allowed

  }

  viod funTwo() { //overriding is allowed

  }

}

By using overloading we can add new functionality to the sub class.

- By using method overriding a sub class can change the definition of super class method.

- By using overriding a sub class can modify the functionality of the super class.

use super keyword.

super keyword points immediate super class.

Class Sample {

int a =23;

 }

Class Sub extends Sample { 

 String a = "bablu";

 void show() {

 System.out.println(a); //bablu

 System. out. println(this.a); //bablu

 System. out.println(super.a); //23

}

}

Class Demo {

Public static void main(string[] args) {

sub s = new Sub();

s.show();

}

}

yes if the method is ovreriding method

no if the method is not overriding method

By using super call we can call super class constructors  from sub class constructors and we can initialize super class private data.