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Class and Object

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Question 1

What will be the output?

C++

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

0
Garbage Value
Compiler Error
None of the Above

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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 data members. Every object has its own copy.
Objects of a class do not share codes of non-static methods. Every object has its own copy.
None of the Above

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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

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Question 4

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.

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Question 5

Which of the following is not a correct statement?

Every class containing abstract method must be declared abstract.
Abstract class can have concrete methods
Abstract class can be initialized.
Abstract class can have static methods.

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Question 6

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

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Question 7

It is possible to define a class within a class termed as nested class. There are _____ ways to do that.

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Question 8

In C++, when one object's reference variable is assigned to another object's 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.

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Question 9

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

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Question 10

Which of the following is not correct for virtual function in C++ ?

Must be declared in public section of class.
Virtual function can be static.
Virtual function should be accessed using pointers.
Virtual function is defined in base class.

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C++ Quiz

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