General Questions

Question 11 :

Which of the following statements is correct about the C#.NET code snippet given below?

int i;
int j = new int();
i = 10;
j = 20; 
String str; 
str = i.ToString(); 
str = j.ToString();


A). This is a perfectly workable code snippet.
B). Since int is a primitive, we cannot use new with it.
C). Since an int is a primitive, we cannot call the method ToString() using it.
D). i will get created on stack, whereas j will get created on heap.
E). Both i and j will get created on heap.
Answer : Option A

Question 12 :

Which of the following statements are correct about the this reference?

1. this reference can be modified in the instance member function of a class.
2. Static functions of a class never receive the this reference.
3. Instance member functions of a class always receive a this reference.
4. this reference continues to exist even after control returns from an instance member function.
5. While calling an instance member function we are not required to pass the this reference explicitly.


A). 1, 4
B). 2, 3, 5
C). 3, 4
D). 2, 5
E). None of these
Answer : Option B

Question 13 :

Which of the following will be the correct output for the C#.NET program given below?

namespace IndiaparinamConsoleApplication
{ 
    class Sample
    { 
        int i; 
        Single j; 
        public void SetData(int i, Single j)
        { 
            this.i = i; 
            this.j = j;
        }
        public void Display()
        { 
            Console.WriteLine(i + " " + j);
        } 
    } 
    class MyProgram
    { 
        static void Main(string[ ] args)
        {
            Sample s1 = new Sample(); 
            s1.SetData(36, 5.4f); 
            s1.Display(); 
        } 
    } 
}


A). 0 0.0
B). 36 5.4
C). 36 5.400000
D). 36 5
E). None of the above
Answer : Option B

Question 14 :

Which of the following statements are correct about objects of a user-defined class called Sample?

1. All objects of Sample class will always have exactly same data.
2. Objects of Sample class may have same or different data.
3. Whether objects of Sample class will have same or different data depends upon a Project Setting made in Visual Studio.NET.
4. Conceptually, each object of Sample class will have instance data and instance member functions of the Sample class.
5. All objects of Sample class will share one copy of member functions.


A). 1, 3
B). 2, 4
C). 4, 5
D). 3, 5
E). None of these
Answer : Option C

Question 15 :

Which of the following statements are correct about the C#.NET code snippet given below?

namespace IndiaparinamConsoleApplication
{ 
    class Sample
    { 
        int i, j; 
        public void SetData(int ii, int jj)
        {
            this.i = ii;
            this.j = jj 
        } 
    } 
    class MyProgram
    { 
        static void Main(string[ ] args)
        { 
            Sample s1 = new Sample(); 
            s1.SetData(10, 2); 
            Sample s2 = new Sample(); 
            s2.SetData(5, 10); 
        } 
    } 
}


A). The code will not compile since we cannot explicitly use this.
B). Using this in this program is necessary to properly set the values in the object.
C). The call to SetData() is wrong since we have not explicitly passed the this reference to it.
D). The definition of SetData() is wrong since we have not explicitly collected the this reference.
E). Contents of this will be different during each call to SetData().
Answer : Option E