C++ Multiple Choice Questions Page 12 of 14

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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

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Level: Practitioner

Category of MCQ: inheritance in C++

Question: 222

More than one class may be derived from a base class

(A) True
(B) False

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Level: Beginner

Category of MCQ: inheritance in C++

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

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Level: Beginner

Category of MCQ: classesAndobjects in C++

Question: 224

Polymorphism means the ability to take many forms

(A) True
(B) False

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Level: Beginner

Category of MCQ: inheritance in C++

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

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Level: Practitioner

Category of MCQ: virtual_func in C++

Question: 226

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

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

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Level: Beginner

Category of MCQ: inheritance in C++

Question: 227

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

(A) True
(B) False

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Level: Practitioner

Category of MCQ: virtual_func in C++

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

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Level: Practitioner

Category of MCQ: virtual_func in C++

Question: 229

The v-table is per class and not per object

(A) True
(B) False

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Level: Practitioner

Category of MCQ: vtable in C++

Question: 230

dynamic_cast can be used only with pointers and references to objects

(A) True
(B) False

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Level: Practitioner

Category of MCQ: typecasting in C++

Question: 231

dynamic_cast is always successful when we cast a class to one of its base classes

(A) True
(B) False

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Level: Practitioner

Category of MCQ: typecasting in C++

Question: 232

When dynamic_cast cannot cast a pointer because it is not
a complete object of the required class it returns
a null pointer to indicate the failure

(A) True
(B) False

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Level: Practitioner

Category of MCQ: typecasting in C++

Question: 233

static_cast can perform conversions between pointers
to related classes not only from the derived class to its base,
but also from a base class to its derived

(A) True
(B) False

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Level: Practitioner

Category of MCQ: typecasting in C++

Question: 234

reinterpret_cast converts any pointer type to any other pointer type, even of unrelated classes

(A) True
(B) False

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Level: Practitioner

Category of MCQ: typecasting in C++

Question: 235

const_cast manipulates the constness of an object, either to be set or to be removed

(A) True
(B) False

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Level: Practitioner

Category of MCQ: typecasting in C++

Question: 236

An exception is always raised using a throw expression

(A) True
(B) False

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Level: Beginner

Category of MCQ: exceptions in C++

Question: 237

Any object (built-in or user-defined) can be thrown

(A) True
(B) False

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Level: Practitioner

Category of MCQ: exceptions in C++

Question: 238

The formal parameter can be an ellipsis, in which case it handles all exceptions not yet handled

(A) True
(B) False

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Level: Practitioner

Category of MCQ: exceptions in C++

Question: 239

Exceptions can be ignored

(A) True
(B) False

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Level: Expert

Category of MCQ: exceptions in C++

Question: 240

If not caught by handlers right after try block, exception moves to next-higher level and may be caught there

(A) True
(B) False

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Level: Practitioner

Category of MCQ: exceptions in C++

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