Declaration and Access Control
practice.

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?

Choose the correct statement

public class Circle{
      private double radius;  
      public Circle(double radius){
            radius = radius;
      }
}

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.

You have the following code in a file called Test.java

class 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?

What will be the output?

public class Test{
	static{
		int a = 5;
	}

	public static void main(String args[]){
		new Test().call();
	}

	void call(){
		this.a++;
		System.out.print(this.a);
	}
}

Determine Output:

class MyClass{
      static final int a = 20;

      static final void call(){
            System.out.println("two");
      }
	
      static{
            System.out.println("one");
      }
}

public class Test{
      public static void main(String args[]){
            System.out.println(MyClass.a);
      }
}

What is the output for the below code?

public class A{
      static{
            System.out.println("static");
      }

      {
            System.out.println("block");
      }

      public A(){
            System.out.println("A");
      }

      public static void main(String[] args){
            A a = new A();
      }
}

What will be the output?

public class Test{
      public static void main(String[] args){
            String value = "abc";
            changeValue(value);
            System.out.println(value);
      }

      public static void changeValue(String a){
            a = "xyz";
      }
}

Name the keyword that makes a variable belong to a class, rather than being defined for each instance of the class.

What will be the output for the below code?

public class Test{
      static{
            int a = 5; 
      }

      public static void main(String[] args){
            System.out.println(a);
      }
}

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 ");
	}
}

What will be the output for the below code?

static public class Test{
      public static void main(String[] args){
            char c = 'a';

            switch(c){
                  case 65 : System.out.println("one");break;
		  case 'a': System.out.println("two");break;
		  case 3  : System.out.println("three");
            }	
      }
}

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);
      }
}

What will be the output after the following program is compiled and executed?

public class Test{
      public static void main(String args[]){
            int x = 10;
	    x = myMethod(x--);
	    System.out.print(x);
      }

      static int myMethod(final int x){
            return x--;
      }
}

What can directly access and change the value of the variable qusNo?

package com.mypackage;

public class Test{
    private int qusNo = 100;
}