php mcq questions with answers


                                


Which of the following statements are correct?



    

  1. Data members ofa class are by default public.

    2. 

  2. Data members of a class are by default private.

    3. 

  3. Member functions of a class are by default public.

    4. 

  4. A private function of a class can access a public function within the same class.

    5. 

  5. Member function of a class are by default private.

    6. 





                                
A.1, 3, 5
B.1, 4
C.2, 4, 5
D.1, 2, 3
E.None of these
                              
Click To Show Ans:C

                        
                                


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



sample c;
c = new sample();


    

  1. It will create an object called sample.

    2. 

  2. It will create a nameless object of the type sample.

    3. 

  3. It will create an object of the type sample on the stack.

    4. 

  4. It will create a reference c on the stack and an object of the type sample on the heap.

    5. 

  5. It will create an object of the type sample either on the heap or on the stack depending on the size of the object.

    6. 





                                
A.1, 3
B.2, 4
C.3, 5
D.4, 5
E.None of these
                              
Click To Show Ans:B

                        
                                


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.
                              
Click To Show Ans:A

                        
                                


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. 

  2. Static functions of a class never receive the this reference.

    3. 

  3. Instance member functions of a class always receive a this reference.

    4. 

  4. 
this reference continues to exist even after control returns from an instance member function.

    5. 

  5. While  calling an  instance  member function we  are  not required to pass the this reference explicitly.

    6. 





                                
A.1, 4
B.2, 3, 5
C.3, 4
D.2, 5
E.None of these
                              
Click To Show Ans:B

                        
                                


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. 

  2. Objects of Sample class may have same or different data.

    3. 

  3. Whether objects of Sample class will have same or different data depends upon a Project Setting made in Visual Studio.NET.

    4. 

  4. Conceptually, each object of Sample class will have instance data and instance member functions of the Sample class.

    5. 

  5. All objects of Sample class will share one copy of member functions.

    6. 





                                
A.1, 3
B.2, 4
C.4, 5
D.3, 5
E.None of these
                              
Click To Show Ans:C