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SCJP 5.0 Objective - 5(10 Questions)

1) What do you infer from the following program?

package scjp5_0.chap05;

public class Ques01 {

	public static void main(String[] args) {

		Manager manager = new Manager();
		TeamMember member = new TeamMember();
		member.rating = 10;
	}
}

class Manager{

	private int rating;
	public void doWork(){
	}
}

class TeamMember{
	public int rating;
	public void doWork(){
	}
}

1. The classes enjoy rich loose-coupling.
2. The classes are poorly designed as there is a good possibility of making relation-ship through inheritance.
3. Both the classes Manager and TeamMember should be made final.
4. The variable rating in the class TeamMember should be made private.
5. The variable rating in the class Manager should be made public.

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Answer

1) b and d.
Answer b is correct since both Manager and TeamMember are both employees and there is a possibility of a class called 'Employee' standing as the base for both Manager and TeamMember. Generally, a variable shouldn't be made public as it is violating the principle of encapsulation. So option d is also correct.

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