Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct?

Declaration and Access Control
Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct?

This method is accessible from within the class itself and from within all classes defined in the same package as the class itself.

This method is only accessible from inside the class itself and from inside all subclasses.

In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined.

From within protected methods you do not have access to public methods.

This method is accessible from within the class itself and from within all classes defined in the same package as the class itself.

This method is only accessible from inside the class itself and from inside all subclasses.

In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined.

From within protected methods you do not have access to public methods.

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Declaration and Access Control
A package is a collection of

Classes

Editing tools and Interfaces

Interfaces

Classes and Interfaces

Editing tools

Classes

Editing tools and Interfaces

Interfaces

Classes and Interfaces

Editing tools

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Declaration and Access Control
You have the following code in a file called Test.javaclass Base{ public static void main(String[] args){ System.out.println("Hello"); }}public class Test extends Base{}What will happen if you try to compile and run this?

Runtime error

Compiles and runs printing

Compiles and runs with no output.

It will fail to compile.

Runtime error

Compiles and runs printing

Compiles and runs with no output.

It will fail to compile.

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Declaration and Access Control
Determine output:class A{{System.out.print("b1 ");}public A(){System.out.print("b2 ");}}class B extends A{static{System.out.print("r1 ");}public B(){System.out.print("r2 ");}{System.out.print("r3 ");}static{System.out.print("r4 ");}}public class Test extends B{public static void main(String[] args){System.out.print("pre ");new Test();System.out.println("post ");}}

r1 r4 pre b1 b2 post r3 r2

r1 r4 pre b1 b2 post

pre r1 r4 b1 b2 r2 r3 post

r1 r4 pre b1 b2 r3 r2 post

Compilation fail

r1 r4 pre b1 b2 post r3 r2

r1 r4 pre b1 b2 post

pre r1 r4 b1 b2 r2 r3 post

r1 r4 pre b1 b2 r3 r2 post

Compilation fail

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Declaration and Access Control
What will be the output after compiling and running following program code?public class Test{ static int a; public static void main(String[] args){ System.out.println("one"); call(1); } static void call(int a){ this.a=10; System.out.println("two "+a); }}

None of these

one two 0

one two 1

one two 10

Compile time error.

None of these

one two 0

one two 1

one two 10

Compile time error.

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Declaration and Access Control
Choose the correct statement. Restriction on static methods are: I. They can only call other static methods.II. They must only access static data.III. They cannot refer this or super in any way.

Only (III)

Only (I)

(I) and (II)

(I), (II) and (III)

(II) and (III)

Only (III)

Only (I)

(I) and (II)

(I), (II) and (III)

(II) and (III)

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Declaration and Access Control

Declaration and Access Control Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct?

Declaration and Access Control A package is a collection of

Declaration and Access Control You have the following code in a file called Test.javaclass Base{ public static void main(String[] args){ System.out.println("Hello"); }}public class Test extends Base{}What will happen if you try to compile and run this?

Declaration and Access Control What will be the output after compiling and running following program code?public class Test{ static int a; public static void main(String[] args){ System.out.println("one"); call(1); } static void call(int a){ this.a=10; System.out.println("two "+a); }}

Declaration and Access Control Choose the correct statement. Restriction on static methods are: I. They can only call other static methods.II. They must only access static data.III. They cannot refer this or super in any way.

Declaration and Access Control
Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct?

Declaration and Access Control
A package is a collection of

Declaration and Access Control
You have the following code in a file called Test.javaclass Base{ public static void main(String[] args){ System.out.println("Hello"); }}public class Test extends Base{}What will happen if you try to compile and run this?

Declaration and Access Control
What will be the output after compiling and running following program code?public class Test{ static int a; public static void main(String[] args){ System.out.println("one"); call(1); } static void call(int a){ this.a=10; System.out.println("two "+a); }}

Declaration and Access Control
Choose the correct statement. Restriction on static methods are: I. They can only call other static methods.II. They must only access static data.III. They cannot refer this or super in any way.