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?

It will fail to compile.
Compiles and runs printing
Compiles and runs with no output.
Runtime error

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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();}}

49
Compile error at line 2 (must access x by writing Tester.x)
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)
Compile error at line 3 (static methods can't make reference to non-static variables)

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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?

Do not declare the method with any accessibility modifiers.
Declare the method with the keyword protected.
Declare the method with the keyword public and private.
Declare the method with the keyword private.
Declare the method with the keyword public.

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Declaration and Access Control
Choose the correct statementpublic class Circle{ private double radius; public Circle(double radius){ radius = radius; }}

The program has a compilation error because we cannot assign radius to radius.
The program has a compilation error because it does not have a main method.
The program does not compile because Circle does not have a default constructor.
The program will compile, but we cannot create an object of Circle with a specified radius. The object will always have radius 0.

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