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C++ Objective Questions - Page-12

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Question: 221

Which of following allows us to create new classes based on existing classes

(A) Polymorphism
(B) Inheritance
(C) Function overloading
(D) None of these

Compiler
Level: Practitioner Category: inheritance
[Posted by: Andrew | New Jersey]

Question: 222

More than one class may be derived from a base class

(A) True
(B) False

Compiler
Level: Beginner Category: inheritance
[Posted by: Andrew | New Jersey]

Question: 223

When you derive a class from an existing class, you __ add new data and functions

(A) never
(B) must
(C) may
(D) None

Compiler
Level: Beginner Category: classesAndobjects
[Posted by: Andrew | New Jersey]

Question: 224

Polymorphism means the ability to take many forms

(A) True
(B) False

Compiler
Level: Beginner Category: inheritance
[Posted by: Andrew | New Jersey]

Question: 225

A virtual function is declared by placing the
key word ___ in front of the return type in 
the base class’s function declaration

(A) virtual
(B) private
(C) public
(D) protected

Compiler
Level: Practitioner Category: virtual_func
[Posted by: Andrew | New Jersey]

Question: 226

In the following statement, what is the derived class?
class Car : protected Vehicle

(A) Car
(B) Vehicle
(C) protected
(D) None

Compiler
Level: Beginner Category: inheritance
[Posted by: Andrew | New Jersey]

Question: 227

A virtual function is a function that expects to be overridden in a derived class

(A) True
(B) False

Compiler
Level: Practitioner Category: virtual_func
[Posted by: Andrew | New Jersey]

Question: 228

The statement below declares a pure virtual function, and must be overridden in derived classes:
virtual void function() = 0;

(A) True
(B) False

Compiler
Level: Practitioner Category: virtual_func
[Posted by: Andrew | New Jersey]

Question: 229

The v-table is per class and not per object

(A) True
(B) False

Compiler
Level: Practitioner Category: vtable
[Posted by: Admin | Chicago, USA]

Question: 230

dynamic_cast can be used only with pointers and references to objects

(A) True
(B) False