When you create a derived class and instantiate an object _____

the child class object must be constructed first

the parent class object must be constructed first

the child class object must be constructed first

the parent class object must not be constructed

the child class object must not be constructed

The purpose of a conditional operator is to

select the more equal of the two values

select the highest of the two values

select one of the two values depending on a condition

select the more equal of the two values

Which of the following is the fourth problem-solving step?

evaluate and modify (if necessary) the program

If a derived class uses the public access specifier, then _____

protected base class members become public in the derived class

public base class members remain public in the derived class

protected base class members become public in the derived class

The return type for all destructors is

the same as the first data in the class

Reference variables and const class member

must not exit if a class is to be a base class

must be assigned values in any derived class

must never be initialized in a base class

must be initialized, rather than assigned values

must not exit if a class is to be a base class

is a name of a thing such as variable and function

is made up of letters, numerals, and the underscore

can contain both uppercase and lowercase letters

The code class Descendant : virtual public Ancestor indicates that

the members of Descendant will be included more than once in Ancestor

the members of Ancestor will be included more than once in Descendant

the members of Ancestor will be included only once in Descendant

the members of Descendant will be included more than once in Ancestor

the members of Descendant will be included only once in Ancestor

The major advantage of data hiding is that _____

your programs can include more data

your data will be used correctly

Programmers prefer to declare almost all variables _____

at the beginning of each function

The difference between a return and a throw is that _____

with a throw, no value can be sent

with a return, no value can be sent

with a throw, execution takes place at the location from which the function was called

with a return, execution takes place at the location from which the function was called

542 + Mcqs in Object Oriented Programming Using Cpp in Computer Science Page 2 McqOptions

51.	With a template class, _____ type is generic
A.	no
B.	exactly one
C.	at least one
D.	at most one
Answer» D. at most one

Discussion

52.	When you create a derived class and instantiate an object _____
A.	the parent class object must be constructed first
B.	the child class object must be constructed first
C.	the parent class object must not be constructed
D.	the child class object must not be constructed
Answer» B. the child class object must be constructed first

Discussion

53.	Which of the following statements will assign the address of the age variable to the agePtr pointer?
A.	agePtr = &age;
B.	agePtr = *age;
C.	&agePtr = age;
D.	*agePtr = age;
Answer» B. agePtr = *age;

Discussion

54.	Private data can be accessed by
A.	class member functions
B.	functions in derived classes
C.	both (a) and (b)
D.	neither (a) nor (b)
Answer» B. functions in derived classes

Discussion

55.	The purpose of a conditional operator is to
A.	select one of the two values
B.	select the highest of the two values
C.	select one of the two values depending on a condition
D.	select the more equal of the two values
Answer» D. select the more equal of the two values

Discussion

56.	When accessing a structure member, the identifier to the left of the dot operator is the name of
A.	a structure member
B.	a structure tag
C.	a structure variable
D.	the keyword struct
Answer» D. the keyword struct

Discussion

57.	"C++" is a _____ constant
A.	character literal
B.	named literal
C.	numeric literal
D.	string literal
Answer» E.

Discussion

58.	A constructor may be _____
A.	provided automatically by C++
B.	written by you
C.	either (a) or (b).
D.	neither (a) nor (b).
Answer» D. neither (a) nor (b).

Discussion

59.	Which of the following are valid characters constants?
A.	'\n'
B.	'\\'
C.	'\0'
D.	All of the above
Answer» E.

Discussion

60.	Which of the following is the fourth problem-solving step?
A.	analyze the problem
B.	evaluate and modify (if necessary) the program
C.	code the algorithm
D.	plan the algorithm
Answer» D. plan the algorithm

Discussion

61.	Access specifiers are followed by
A.	a comma
B.	a semicolon
C.	a colon
D.	two colons
Answer» D. two colons

Discussion

62.	The extraction operator >> is a(n)
A.	overloaded function
B.	C++ class
C.	C++ object
D.	static reference variable
Answer» B. C++ class

Discussion

63.	When variables refer to attributes of an entity (such as name, address, and phone number of a person), those attributes form a _____
A.	file
B.	record
C.	field
D.	program
Answer» C. field

Discussion

64.	Which of the following flowchart symbols represents the if selection structure?
A.	diamond
B.	hexagon
C.	oval
D.	parallelogram
Answer» B. hexagon

Discussion

65.	A 'C function does not contain
A.	a function header
B.	argument declarations
C.	other 'C' functions
D.	function body
Answer» D. function body

Discussion

66.	If a derived class uses the public access specifier, then _____
A.	public base class members remain public in the derived class
B.	protected base class members become public in the derived class
C.	both (a) and (b)
D.	neither (a) nor (b)
Answer» B. protected base class members become public in the derived class

Discussion

67.	Assume a program contains a void function named displayName, which requires no formal parameters. Which of the following is a correct function prototype for this function?
A.	displayName;
B.	displayName(void);
C.	void displayName;
D.	void displayName();
Answer» E.

Discussion

68.	Which of the following while clause will stop the loop when the value in the age variable is less than the number 0?
A.	while age < 0
B.	while (age < 0)
C.	while age >= 0;
D.	while (age >= 0);
Answer» E.

Discussion

69.	Variables that hold memory addresses are called _____
A.	subscripts
B.	holders
C.	pointers
D.	indicators
Answer» D. indicators

Discussion

70.	Element doubleArray[7] is which element of the array?
A.	the sixth
B.	the seventh
C.	the eighth
D.	impossible to tell
Answer» D. impossible to tell

Discussion

71.	The return type for all destructors is
A.	the class
B.	void
C.	the same as the first data in the class
D.	None
Answer» E.

Discussion

72.	Which of the following is an access specifier?
A.	particular
B.	shielded
C.	protected
D.	safe
Answer» D. safe

Discussion

73.	Modules in C++ programs are
A.	functions
B.	procedures
C.	subroutines
D.	miniprograms
Answer» B. procedures

Discussion

74.	Variable names known only to the procedure in which they are declared are ________
A.	local
B.	global
C.	recent
D.	internal
Answer» B. global

Discussion

75.	Assume a class Derv that is privately derived from class Base. An object of class Derv located in main() can access
A.	public members of Base
B.	protected members of Base
C.	private members of Base
D.	public members of Derv
Answer» B. protected members of Base

Discussion

76.	In which statements, does a 'continue' statements cause the control to go directly to the test condition and then continue the looping process?
A.	'for' and 'while'
B.	'while' and 'if-else'
C.	'do-while' and 'if-else'
D.	'while' and 'do-while'
Answer» E.

Discussion

77.	The contents of two pointers that point to adjacent of type float differ by
A.	one bytes
B.	two bytes
C.	three bytes
D.	four bytes
Answer» E.

Discussion

78.	The feature in object-oriented programming that allows the same operation to be carried out differently, depending on the object, is_____
A.	inheritance
B.	polymorphism
C.	overfunctioning
D.	overriding
Answer» C. overfunctioning

Discussion

79.	A normal C++ operator that acts in special ways on newly defined data types is said to be
A.	glorified
B.	encapsulated
C.	classified
D.	overloaded
Answer» E.

Discussion

80.	The end of string is recognized by
A.	the null character
B.	the newline character
C.	the $ sign
D.	the / sign
Answer» B. the newline character

Discussion

81.	Reference variables and const class member
A.	must be assigned values in any derived class
B.	must never be initialized in a base class
C.	must be initialized, rather than assigned values
D.	must not exit if a class is to be a base class
Answer» D. must not exit if a class is to be a base class

Discussion

82.	The letter V is a _____
A.	character literal constant
B.	numeric literal constant
C.	string literal constant
D.	variable
Answer» B. numeric literal constant

Discussion

83.	An identifier in C
A.	is a name of a thing such as variable and function
B.	is made up of letters, numerals, and the underscore
C.	can contain both uppercase and lowercase letters
D.	All of the above
Answer» E.

Discussion

84.	A(n) _____ is always incremented by a constant amount, whereas a(n) _____ is incremented by an amount that varies
A.	accumulator, counter
B.	counter, accumulator
Answer» C.

Discussion

85.	The code class Descendant : virtual public Ancestor indicates that
A.	the members of Ancestor will be included more than once in Descendant
B.	the members of Ancestor will be included only once in Descendant
C.	the members of Descendant will be included more than once in Ancestor
D.	the members of Descendant will be included only once in Ancestor
Answer» C. the members of Descendant will be included more than once in Ancestor

Discussion

86.	Which of the following C++ expressions is equivalent to the mathematical expression 53 ?
A.	5 ^ 3
B.	cube(5)
C.	pow (3, 5)
D.	pow(5, 3)
Answer» E.

Discussion

87.	Storing a class definition in a separate file is an example of
A.	polymorphism
B.	name mangling
C.	implementation hiding
D.	inheritance
Answer» D. inheritance

Discussion

88.	The number of structures than can be declared in a single statement is
A.	one
B.	two
C.	three
D.	unlimited
Answer» E.

Discussion

89.	The major advantage of data hiding is that _____
A.	your programs can include more data
B.	you no longer need functions
C.	no one can ever use your data
D.	your data will be used correctly
Answer» E.

Discussion

90.	One of the relational operators in the C language is
A.	!=
B.	&&
C.	!
D.	#
Answer» B. &&

Discussion

91.	When the compiler cannot differentiate between two overloaded constructors, they are called______
A.	overloaded
B.	destructed
C.	ambiguous
D.	dubious
Answer» D. dubious

Discussion

92.	Programmers prefer to declare almost all variables _____
A.	at the beginning of each function
B.	globally
C.	on one line
D.	with cryptic names
Answer» B. globally

Discussion

93.	Which of the following statements declares a variable that can contain a decimal number?
A.	dec payRate;
B.	dec hourlyPay
C.	float payRate
D.	float hourlyPay;
Answer» E.

Discussion

94.	In the statement template,
A.	T is a class
B.	T is a scalar variable
C.	either (a) or (b)
D.	neither (a) nor (b)
Answer» D. neither (a) nor (b)

Discussion

95.	The most efficient data type for a variable that stores the letter C is the _____ data type
A.	Character
B.	Double
C.	Float
D.	Long Integer
Answer» B. Double

Discussion

96.	To write data that contains variables of type float, to an object of type ofstream, you should use
A.	the insertion operator
B.	seekg()
C.	writeQ
D.	put()
Answer» D. put()

Discussion

97.	Which of the following is not a programming control structure?
A.	repetition
B.	selection
C.	sequency
D.	sorting
Answer» E.

Discussion

98.	To use a template class member function, use the ________ with the instantiation
A.	scope resolution operator
B.	dot operator
C.	class definition
D.	keword template
Answer» C. class definition

Discussion

99.	To use one of the C++ built-in mathematical functions, you must include the _____ header file in your program
A.	calculation.h
B.	compute.h
C.	expression.h
D.	math.h
Answer» E.

Discussion

100.	The difference between a return and a throw is that _____
A.	with a throw, no value can be sent
B.	with a return, no value can be sent
C.	with a throw, execution takes place at the location from which the function was called
D.	with a return, execution takes place at the location from which the function was called
Answer» E.

Discussion

Explore topic-wise MCQs in Computer Science.

With a template class, _____ type is generic

When you create a derived class and instantiate an object _____

Which of the following statements will assign the address of the age variable to the agePtr pointer?

Private data can be accessed by

The purpose of a conditional operator is to

When accessing a structure member, the identifier to the left of the dot operator is the name of

"C++" is a _____ constant

A constructor may be _____

Which of the following are valid characters constants?

Which of the following is the fourth problem-solving step?

Access specifiers are followed by

The extraction operator >> is a(n)

When variables refer to attributes of an entity (such as name, address, and phone number of a person), those attributes form a _____

Which of the following flowchart symbols represents the if selection structure?

A 'C function does not contain

If a derived class uses the public access specifier, then _____

Assume a program contains a void function named displayName, which requires no formal parameters. Which of the following is a correct function prototype for this function?

Which of the following while clause will stop the loop when the value in the age variable is less than the number 0?

Variables that hold memory addresses are called _____

Element doubleArray[7] is which element of the array?

The return type for all destructors is

Which of the following is an access specifier?

Modules in C++ programs are

Variable names known only to the procedure in which they are declared are ________

Assume a class Derv that is privately derived from class Base. An object of class Derv located in main() can access

In which statements, does a 'continue' statements cause the control to go directly to the test condition and then continue the looping process?

The contents of two pointers that point to adjacent of type float differ by

The feature in object-oriented programming that allows the same operation to be carried out differently, depending on the object, is_____

A normal C++ operator that acts in special ways on newly defined data types is said to be

The end of string is recognized by

Reference variables and const class member

The letter V is a _____

An identifier in C

A(n) _____ is always incremented by a constant amount, whereas a(n) _____ is incremented by an amount that varies

The code class Descendant : virtual public Ancestor indicates that

Which of the following C++ expressions is equivalent to the mathematical expression 53 ?

Storing a class definition in a separate file is an example of

The number of structures than can be declared in a single statement is

The major advantage of data hiding is that _____

One of the relational operators in the C language is

When the compiler cannot differentiate between two overloaded constructors, they are called______

Programmers prefer to declare almost all variables _____

Which of the following statements declares a variable that can contain a decimal number?

In the statement template,

The most efficient data type for a variable that stores the letter C is the _____ data type

To write data that contains variables of type float, to an object of type ofstream, you should use

Which of the following is not a programming control structure?

To use a template class member function, use the ________ with the instantiation

To use one of the C++ built-in mathematical functions, you must include the _____ header file in your program

The difference between a return and a throw is that _____

A(n) _ is always incremented by a constant amount, whereas a(n) _ is incremented by an amount that varies