What is the result of compiling and running the following code?class Base{ private Base(){ System.out.print("Base"); }}public class test extends Base{ public test(){ System.out.print("Derived"); } public static void main(String[] args){ new test(); }}

Declaration and Access Control
What is the result of compiling and running the following code?class Base{ private Base(){ System.out.print("Base"); }}public class test extends Base{ public test(){ System.out.print("Derived"); } public static void main(String[] args){ new test(); }}

Exception is thrown at runtime

Compilation Error

BaseDerived

Derived

Exception is thrown at runtime

Compilation Error

BaseDerived

Derived

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Declaration and Access Control
What is the result of compiling and running the following code?public class Tester{static int x = 4;public Tester(){System.out.print(this.x); // line 1Tester();}public static void Tester(){ // line 2System.out.print(this.x); // line 3}public static void main(String... args){ // line 4new Tester();}}

Compile error at line 2 (constructors can't be static)

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 4 (invalid argument type for method main )

44

Compile error at line 3 (static methods can't invoke this)

Compile error at line 2 (constructors can't be static)

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 4 (invalid argument type for method main )

44

Compile error at line 3 (static methods can't invoke this)

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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 ");}}

Compilation fail

r1 r4 pre b1 b2 post r3 r2

pre r1 r4 b1 b2 r2 r3 post

r1 r4 pre b1 b2 r3 r2 post

r1 r4 pre b1 b2 post

Compilation fail

r1 r4 pre b1 b2 post r3 r2

pre r1 r4 b1 b2 r2 r3 post

r1 r4 pre b1 b2 r3 r2 post

r1 r4 pre b1 b2 post

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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?

Compiles and runs with no output.

It will fail to compile.

Compiles and runs printing

Runtime error

Compiles and runs with no output.

It will fail to compile.

Compiles and runs printing

Runtime error

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Declaration and Access Control
A method within a class is only accessible by classes that are defined within the same package as the class of the method. Which one of the following is used to enforce such restriction?

Declare the method with the keyword public.

Declare the method with the keyword protected.

Declare the method with the keyword private.

Do not declare the method with any accessibility modifiers.

Declare the method with the keyword public and private.

Declare the method with the keyword public.

Declare the method with the keyword protected.

Declare the method with the keyword private.

Do not declare the method with any accessibility modifiers.

Declare the method with the keyword public and private.

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Declaration and Access Control
What is the result of compiling and running the following code?public class Tester{static int x = 4;int y = 9; public Tester(){System.out.print(this.x); // line 1printVariables();}public static void printVariables(){System.out.print(x); // line 2System.out.print(y); // line 3}public static void main(String... args) { // line 4new Tester();}}

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 2 (must access x by writing Tester.x)

49

Compile error at line 3 (static methods can't make reference to non-static variables)

Compile error at line 4 (invalid argument type for method main)

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 2 (must access x by writing Tester.x)

49

Compile error at line 3 (static methods can't make reference to non-static variables)

Compile error at line 4 (invalid argument type for method main)

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Declaration and Access Control

Declaration and Access Control What is the result of compiling and running the following code?class Base{ private Base(){ System.out.print("Base"); }}public class test extends Base{ public test(){ System.out.print("Derived"); } public static void main(String[] args){ new test(); }}

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 A method within a class is only accessible by classes that are defined within the same package as the class of the method. Which one of the following is used to enforce such restriction?

Declaration and Access Control
What is the result of compiling and running the following code?class Base{ private Base(){ System.out.print("Base"); }}public class test extends Base{ public test(){ System.out.print("Derived"); } public static void main(String[] args){ new test(); }}

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
A method within a class is only accessible by classes that are defined within the same package as the class of the method. Which one of the following is used to enforce such restriction?