Classes & Objects — Practice MCQs for CCAT

Correct Answer: B — private

In C++, class members are private by default.

Correct Answer: A — public

In C++, struct members are public by default (unlike class).

Correct Answer: B — Blueprint for objects

A class is a blueprint/template that defines properties and behaviors for objects.

Correct Answer: B — Instance of class

An object is an instance of a class.

Correct Answer: B — When object is created

Constructor is automatically called when an object is created.

Correct Answer: A — ~ClassName

Destructor name is class name prefixed with tilde (~).

Correct Answer: D — Constructor and Destructor

Both constructor and destructor have same name as class (destructor with ~).

Correct Answer: B — Reference to same class object

Copy constructor takes a reference to object of same class.

Correct Answer: B — All objects of class

Static members are shared by all objects of the class.

Correct Answer: B — Private and protected members

Friend function can access private and protected members of the class.

Correct Answer: B — private

In C++, class members are private by default, unlike struct members which are public.

Correct Answer: B — Object is initialized from another object

Copy constructor is invoked when an object is initialized using another object of the same class.

Correct Answer: B — :: scope resolution

Scope resolution (::), member access (.), sizeof, and ternary (?:) operators cannot be overloaded.

Correct Answer: B — ~ tilde

Destructor is named with tilde (~) followed by class name, e.g., ~ClassName().

Correct Answer: A — Address of current object

this pointer holds the address of the current object invoking the member function.

Correct Answer: C — Unlimited

There is no limit on the number of objects that can be created from a class (limited only by memory).

Correct Answer: A — Only static members

Static member functions can only access static data members as they have no this pointer.

Correct Answer: B — Losing derived class data when assigned to base

Object slicing occurs when a derived class object is assigned to base class, losing derived-specific data.

Correct Answer: B — Modification in const member function

Mutable members can be modified even inside const member functions.

Correct Answer: B — Inside class definition

Functions defined inside the class body are implicitly inline functions.