Class and Object

Question 1

C

class Test {
    int x; 
};
int main()
{
  Test t;
  cout << t.x;
  return 0;
}

• 0
• Garbage Value
• Compiler Error

Question 2

Which of the following is true?

• All objects of a class share all data members of class
• Objects of a class do not share non-static members. Every object has its own copy.
• Objects of a class do not share codes of non-static methods, they have their own copy
• None of the above

Question 3

Assume that an integer and a pointer each takes 4 bytes. Also, assume that there is no alignment in objects. Predict the output following program.

CPP

#include<iostream>
using namespace std;

class Test
{
    static int x;
    int *ptr;
    int y;
};

int main()
{
    Test t;
    cout << sizeof(t) << \" \";
    cout << sizeof(Test *);
}

• 12 4
• 12 12
• 8 4
• 8 8

Question 4

Which of the following cannot be passed to a function in C++ ?

• Constant
• Structure
• Array
• Header file

Question 5

Which of the following is a correct statement?

• Composition is a strong type of association between two classes with full ownership.
• Composition is a strong type of association between two classes with partial ownership.
• Composition is a weak type of association between two classes with partial ownership.
• Composition is a weak type of association between two classes with strong ownership.

Question 6

Which of the following is not a correct statement?

• Every class containing abstract method must be declared abstract.
• Abstract class can directly be initiated with ‘new’ operator.
• Abstract class can be initiated.
• Abstract class does not contain any definition of implementation.

Question 7

When a method in a subclass has the same name and type signatures as a method in the superclass, then the method in the subclass _____ the method in the superclass.

• Overloads
• Friendships
• Inherits
• Overrides

Question 8

It is possible to define a class within a class termed as nested class. There are _____ types of nested classes.

• 2

• 3

• 4

• 5

Question 9

When one object reference variable is assigned to another object reference variable then

• a copy of the object is created.
• a copy of the reference is created.
• a copy of the reference is not created.
• it is illegal to assign one object reference variable to another object reference variable.

Question 10

A member function can always access the data in __________ , (in C++).

• the class of which it is member
• the object of which it is a member
• the public part of its class
• the private part of its class