Declaration and Access Control -Java Programming MCQ Questions and Answers

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41.
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?

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42.
Choose the correct statement
public class Circle{
      private double radius;  
      public Circle(double radius){
            radius = radius;
      }
}

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43.
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.

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44.
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?

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45.
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);
	}
}

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46.
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);
      }
}

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47.
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();
      }
}

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48.
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";
      }
}

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50.
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);
      }
}

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