172 + Mcqs in Object Oriented Programming Using C++ Page 3 McqOptions

101.	Name the header file to be included for the use of built in function isalnum().
A.	string.h
B.	process.h
C.	ctype.h
D.	dos.h
Answer» D. dos.h

Discussion

102.	To convert from a user defined class to a basic type, you would most likely use
A.	A built-in conversion function
B.	A one-argument constructor
C.	A conversion function that’s a member of the class
D.	An overloaded ‘=‘ operator
Answer» D. An overloaded ‘=‘ operator

Discussion

103.	What will be the values of x, m and n after the execution of the following statements?int x, m, n;m = 10;n = 15;x = ++m + n++;
A.	x=25, m=10, n=15
B.	x=26, m=11, n=16
C.	x=27, m=11, n=16
D.	x=27, m=10, n=15
Answer» C. x=27, m=11, n=16

Discussion

104.	A class defined within another class is:
A.	Nested class
B.	Inheritance
C.	Containership
D.	Encapsulation
Answer» B. Inheritance

Discussion

105.	Which of the following expressions is illegal?
A.	(10\| 6)
B.	(false && true)
C.	bool (x) = (bool)10;
D.	float y = 12.67;
Answer» D. float y = 12.67;

Discussion

106.	The actual source code for implementing a template function is created when
A.	The declaration of function appears
B.	The function is invoked
C.	The definition of the function appears
D.	None of the above
Answer» C. The definition of the function appears

Discussion

107.	What is the error in the following code? class t { virtual void print(); }
A.	No error
B.	Function print() should be declared as static
C.	Function print() should be defined
D.	Class t should contain data members
Answer» B. Function print() should be declared as static

Discussion

108.	A white space is :
A.	blank space
B.	new line
C.	tab
D.	all of the above
Answer» E.

Discussion

109.	In programming, reusable code is the use of similar code in
A.	single function
B.	two functions
C.	multiple functions
D.	can't use similar code
Answer» D. can't use similar code

Discussion

110.	A base class contains elements common to a group of
A.	parent classes
B.	derived classes
C.	sub classes
D.	variables
Answer» C. sub classes

Discussion

111.	One object oriented class can become parent of several
A.	objects
B.	sub classes
C.	sub objects
D.	variables
Answer» C. sub objects

Discussion

112.	For human being, eye color is a
A.	attribute
B.	behavior
C.	constant
D.	loop
Answer» B. behavior

Discussion

113.	C++ was originally called
A.	C with objects
B.	C with classes
C.	C with functions
D.	C with loops
Answer» C. C with functions

Discussion

114.	Access to private data
A.	Restricted to methods of the same class
B.	Restricted to methods of other classes
C.	Available to methods of the same class and other classes
D.	Not an issue because the program will not compile
Answer» C. Available to methods of the same class and other classes

Discussion

115.	The members of a class by default are
A.	Public
B.	Protected
C.	Private
D.	Mandatory to specify
Answer» D. Mandatory to specify

Discussion

116.	Use of virtual functions implies
A.	overloading
B.	overriding
C.	static binding
D.	dynamic binding
Answer» E.

Discussion

117.	Consider the following statements char *ptr; ptr = “hello”; cout
A.	first letter
B.	entire string
C.	it is a syntax error
D.	last letter
Answer» B. entire string

Discussion

118.	Consider the following statements: int x = 22,y=15; x = (x>y) ? (x+y) : (x-y); What will be the value of x after executing these statements?
A.	22
B.	37
C.	7
D.	Error. Cannot be executed
Answer» C. 7

Discussion

119.	A library function exit() causes an exit from
A.	the loop in which it occurs
B.	the block in which it occurs
C.	the function in which it occurs
D.	the program in which it occurs
Answer» E.

Discussion

120.	Objects are members of
A.	classes
B.	functions
C.	variables
D.	data
Answer» B. functions

Discussion

121.	In Smalltalk language, object functions are named as
A.	member functions
B.	methods
C.	local functions
D.	linear functions
Answer» C. local functions

Discussion

122.	Most individual program statements in C++ are similar to statements in
A.	procedural language
B.	machine language
C.	assembly language
D.	JAVA
Answer» B. machine language

Discussion

123.	In a one class, we can define
A.	one object
B.	two objects
C.	multiple objects
D.	no object
Answer» D. no object

Discussion

124.	A template class
A.	is designed to be stored in different containers
B.	works with different data types
C.	generates objects which must be identical
D.	generates classes with different numbers of member functions
Answer» C. generates objects which must be identical

Discussion

125.	If a base class destructor is not virtual, then
A.	It can not have a function body
B.	It can not be called
C.	It can not be called when accessed from pointer
D.	Destructor in derived class can not be called when accessed through a pointer to the base class
Answer» E.

Discussion

126.	If an array is declared asint a[4] = {3, 0, 1, 2}, then values assigned to a[0] & a[4] will be ________.
A.	3, 2
B.	0, 2
C.	3, 0
D.	0, 4
Answer» D. 0, 4

Discussion

127.	It is possible to declare as a friend
A.	a member function
B.	a global function
C.	a class
D.	all of the above
Answer» E.

Discussion

128.	If there is a pointer p to object of a base class and it contains the address of an object of a derived class and both classes contain a virtual member function abc(), then the statement p->abc(); will cause the version of abc() in the __________class to be executed.
A.	Base Class
B.	Derived class
C.	Produces compile time error
D.	produces runtime error
Answer» C. Produces compile time error

Discussion

129.	Behaviors in the real world are equivalent to program's
A.	data
B.	function
C.	module
D.	loop
Answer» C. module

Discussion

130.	In C++, dynamic memory allocation is accomplished with the operator ____
A.	new
B.	this
C.	malloc()
D.	delete
Answer» B. this

Discussion

131.	Point on a plane is data type which is
A.	by default
B.	randomly defined
C.	user defined
D.	not a data type
Answer» D. not a data type

Discussion

132.	Entire member function in C++ program resembles procedural function of
A.	SmallTalk
B.	C++
C.	JAVA
D.	PHP
Answer» C. JAVA

Discussion

133.	_________ members of a base class are never accessible to a derived class.
A.	Public
B.	Private
C.	Protected
D.	All of the above
Answer» C. Protected

Discussion

134.	Runtime polymorphism is achieved by
A.	Friend function
B.	Virtual function
C.	Operator overloading
D.	Function overloading
Answer» C. Operator overloading

Discussion

135.	Which of the statements are true ?I. Function overloading is done at compile time.II. Protected members are accessible to the member of derived class.III. A derived class inherits constructors and destructors.IV. A friend function can be called like a normal function.V. Nested class is a derived class.
A.	I, II, III
B.	II, III, V
C.	III, IV, V
D.	I, II, IV
Answer» E.

Discussion

136.	The address of a variable temp of type float is
A.	*temp
B.	&temp
C.	float& temp
D.	float temp&
Answer» C. float& temp

Discussion

137.	The keyword friend does not appear in
A.	the class allowing access to another class
B.	the class desiring access to another class
C.	the private section of a class
D.	the public section of a class
Answer» D. the public section of a class

Discussion

138.	A function call mechanism that passes arguments to a function by passing a copy of the values of the arguments is __________
A.	call by name
B.	call by value
C.	call by reference
D.	call by value result
Answer» C. call by reference

Discussion

139.	A friend function to a class, C cannot access
A.	private data members and member functions
B.	public data members and member functions
C.	protected data members and member functions
D.	the data members of the derived class of C
Answer» E.

Discussion

140.	If a class C is derived from class B, which is derived from class A, all through public inheritance, then a class C member function can access
A.	protected and public data only in C and B
B.	protected and public data only in C
C.	private data in A and B
D.	protected data in A and B
Answer» E.

Discussion

141.	There is no close match exist between programming constructs and items being modeled in
A.	procedural language
B.	Object oriented language
C.	C++
D.	JAVA
Answer» B. Object oriented language

Discussion

142.	Overloading is the kind of
A.	polymorphism
B.	dimorphism
C.	trimorphisim
D.	automorphism
Answer» B. dimorphism

Discussion

143.	Something a real world object does in response to some stimulus is termed as
A.	attribute
B.	behavior
C.	constant
D.	loop
Answer» C. constant

Discussion

144.	Bundling data and function together is termed as
A.	encapsulation
B.	declaration
C.	initialization
D.	deletion
Answer» B. declaration

Discussion

145.	Data type integer is declared by syntax
A.	int
B.	integer
C.	INt
D.	INT
Answer» B. integer

Discussion

146.	In C++, object's function is known as
A.	member function
B.	bit function
C.	obj function
D.	linear function
Answer» B. bit function

Discussion

147.	C++ was originally developed by
A.	Clocksin and Melish
B.	Donald E.Knuth
C.	Sir Richard Hadlee
D.	Bjarne Stroustrup
Answer» E.

Discussion

148.	Given a class named Book, which of the following is not a valid constructor?
A.	Book ( ) { }
B.	Book ( Book b) { }
C.	Book ( Book &b) { }
D.	Book (char* author, char* title) { }
Answer» C. Book ( Book &b) { }

Discussion

149.	A static function
A.	should be called when an object is destroyed
B.	is closely connected with and individual object of a class
C.	can be called using the class name and function name
D.	is used when a dummy object must be created
Answer» D. is used when a dummy object must be created

Discussion

150.	If we store the address of a derived class object into a variable whose type is a pointer to the base class, then the object, when accessed using this pointer.
A.	continues to act like a derived class object
B.	continues to act like a derived class object if virtual functions are called
C.	Acts like a base class object
D.	Acts like a base class, if virtual functions are called
Answer» C. Acts like a base class object

Discussion

Explore topic-wise MCQs in Artificial Intelligence.

Name the header file to be included for the use of built in function isalnum().

To convert from a user defined class to a basic type, you would most likely use

What will be the values of x, m and n after the execution of the following statements?int x, m, n;m = 10;n = 15;x = ++m + n++;

A class defined within another class is:

Which of the following expressions is illegal?

The actual source code for implementing a template function is created when

What is the error in the following code? class t { virtual void print(); }

A white space is :

In programming, reusable code is the use of similar code in

A base class contains elements common to a group of

One object oriented class can become parent of several

For human being, eye color is a

C++ was originally called

Access to private data

The members of a class by default are

Use of virtual functions implies

Consider the following statements char *ptr; ptr = “hello”; cout

Consider the following statements: int x = 22,y=15; x = (x>y) ? (x+y) : (x-y); What will be the value of x after executing these statements?

A library function exit() causes an exit from

Objects are members of

In Smalltalk language, object functions are named as

Most individual program statements in C++ are similar to statements in

In a one class, we can define

A template class

If a base class destructor is not virtual, then

If an array is declared asint a[4] = {3, 0, 1, 2}, then values assigned to a[0] & a[4] will be ________.

It is possible to declare as a friend

If there is a pointer p to object of a base class and it contains the address of an object of a derived class and both classes contain a virtual member function abc(), then the statement p->abc(); will cause the version of abc() in the __________class to be executed.

Behaviors in the real world are equivalent to program's

In C++, dynamic memory allocation is accomplished with the operator ____

Point on a plane is data type which is

Entire member function in C++ program resembles procedural function of

_________ members of a base class are never accessible to a derived class.

Runtime polymorphism is achieved by

The address of a variable temp of type float is

The keyword friend does not appear in

A function call mechanism that passes arguments to a function by passing a copy of the values of the arguments is __________

A friend function to a class, C cannot access

If a class C is derived from class B, which is derived from class A, all through public inheritance, then a class C member function can access

There is no close match exist between programming constructs and items being modeled in

Overloading is the kind of

Something a real world object does in response to some stimulus is termed as

Bundling data and function together is termed as

Data type integer is declared by syntax

In C++, object's function is known as

C++ was originally developed by

Given a class named Book, which of the following is not a valid constructor?

A static function

If we store the address of a derived class object into a variable whose type is a pointer to the base class, then the object, when accessed using this pointer.