C# Class MCQs

Question 11: Which of the following statements are TRUE about constructors in C#.NET?

Answer: A, C

The constructor methods cannot be called explicitly and return value. It gets called automatically when you create an object of the class.

Question 12: Is the constructor called multiple times during the lifetime of an object?

Answer: B

The constructor method only called once when the object is created.

Question 13: You have defined the Employee class, which includes the GetSalary() method. You need to ensure that the GetSalary() method can be used only by the Employee class or a class derived from it. Which access modifier should you use for the GetSalary() method?

Answer: C

The protected members can only be accessed from the class itself or from the derived class.

Question 14: What will be the output of the following program?

public class Program
{
	public static void Main(string[] args)
 	{
		for(int i=0;i<4;i++) 
            Print(i);
    }

    public void Print(object o)
    {
        Console.WriteLine(o);
    }
}

Answer: C

Only static members of the class can be accessed in the static methods. Non-static members cannot be accessed from inside static members. The Main() method is the static method whereas the Print() method is not the static method, so you cannot call the Print() method from the Main() method.

Question 15: Which of the following statements is TRUE?

Answer: C