What will be the output?interface A{public void method();}class One{public void method(){System.out.println("Class One method");}}class Two extends One implements A{public void method(){System.out.println("Class Two method");}}public class Test extends Two{public static void main(String[] args){A a = new Two();a.method();}}

JAVA Interfaces and Abstract Classes
What will be the output?interface A{public void method();}class One{public void method(){System.out.println("Class One method");}}class Two extends One implements A{public void method(){System.out.println("Class Two method");}}public class Test extends Two{public static void main(String[] args){A a = new Two();a.method();}}

Compilation Error

will print Class One method

compiles fine but print nothing

will print Class Two method

None of these

Compilation Error

will print Class One method

compiles fine but print nothing

will print Class Two method

None of these

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JAVA Interfaces and Abstract Classes
Which of the following class definitions defines a legal abstract class?

abstract class A { abstract void unfinished(); }

class A { abstract void unfinished() { } }

public class abstract A { abstract void unfinished(); }

class A { abstract void unfinished(); }

abstract class A { abstract void unfinished(); }

class A { abstract void unfinished() { } }

public class abstract A { abstract void unfinished(); }

class A { abstract void unfinished(); }

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JAVA Interfaces and Abstract Classes
What happens if the following program is compiled and executed?interface MyInterface{ void display();}interface MySubInterface extends MyInterface{ void display();}public class Test implements MySubInterface{ public void display(){ System.out.print("Welcome to Examveda."); } public static void main(String args[]){ Test t = new Test(); t.display(); }}

The code will lead to a compilation error as declaration of the display method has been provided in two interface.

The code will compile and execute successfully showing the output Welcome to Examians.

None of these

The code will lead to a compilation error due to public modifier while declaring the display method.

The code will lead to a compilation error as the display method is not declared as abstract.

The code will lead to a compilation error as declaration of the display method has been provided in two interface.

The code will compile and execute successfully showing the output Welcome to Examians.

None of these

The code will lead to a compilation error due to public modifier while declaring the display method.

The code will lead to a compilation error as the display method is not declared as abstract.

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JAVA Interfaces and Abstract Classes
Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have a default constructor. Which of the following is correct?1. A a = new A();2. A a = new B();3. B b = new A();4. B b = new B();

1 and 2

2 and 3

2 and 4

3 and 4

1 and 3

1 and 2

2 and 3

2 and 4

3 and 4

1 and 3

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JAVA Interfaces and Abstract Classes
What will be the output when the following program is compiled and executed?abstract class TestAbstract{ String my_name; String myName(){ my_name = "Examveda"; return my_name; } abstract void display();}public class Test extends TestAbstract{ void display(){ String n = myName(); System.out.print("My name is "+ n); } public static void main(String args[]){ Test t = new Test(); t.display(); }}

Program will compile and execute successfully and prints

Compilation error as class can not be declared as abstract.

None of these

Program compiles but leads to runtime exception.

Compilation error occurs as the abstract class TestAbstract contains a non-abstract method.

Program will compile and execute successfully and prints

Compilation error as class can not be declared as abstract.

None of these

Program compiles but leads to runtime exception.

Compilation error occurs as the abstract class TestAbstract contains a non-abstract method.

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JAVA Interfaces and Abstract Classes
interface Test{ int p = 10; //line 1 public int q = 20; //line 2 public static int r = 30; //line 3 public static final int s = 40; //line 4}Which of the above line will give compilation error?

3

2

4

1

None of these

3

2

4

1

None of these

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JAVA Interfaces and Abstract Classes

JAVA Interfaces and Abstract Classes Which of the following class definitions defines a legal abstract class?

JAVA Interfaces and Abstract Classes Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have a default constructor. Which of the following is correct?1. A a = new A();2. A a = new B();3. B b = new A();4. B b = new B();

JAVA Interfaces and Abstract Classes interface Test{ int p = 10; //line 1 public int q = 20; //line 2 public static int r = 30; //line 3 public static final int s = 40; //line 4}Which of the above line will give compilation error?

JAVA Interfaces and Abstract Classes
Which of the following class definitions defines a legal abstract class?

JAVA Interfaces and Abstract Classes
Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have a default constructor. Which of the following is correct?1. A a = new A();2. A a = new B();3. B b = new A();4. B b = new B();

JAVA Interfaces and Abstract Classes
interface Test{ int p = 10; //line 1 public int q = 20; //line 2 public static int r = 30; //line 3 public static final int s = 40; //line 4}Which of the above line will give compilation error?