542 + Mcqs in Object Oriented Programming Using Cpp Page 11 McqOptions

501.	The word case used in the switch statement represents a
A.	function in the C++ language
B.	data type in the C++ language
C.	keyword in the C++ language
D.	global variable in the C++ language
Answer» D. global variable in the C++ language

Discussion

502.	Which of the following can be used to declare the main function?
A.	void main
B.	void Main()
C.	void main()
D.	main
Answer» D. main

Discussion

503.	What does C++ append to the end of a string literal constant?
A.	a space
B.	a number sign (#)
C.	an asterisk (*)
D.	a null character
Answer» E.

Discussion

504.	The function that takes arguments to set the bits of count is _____
A.	setf()
B.	bitsef()
C.	ios()
D.	flag()
Answer» B. bitsef()

Discussion

505.	Library header files usually contain
A.	complete functions
B.	parts of functions
C.	function prototypes for functions stored in other files
D.	function bodies, but not function headers
Answer» D. function bodies, but not function headers

Discussion

506.	When a child class function is called, the compiler looks first for a matching function name in the _____
A.	class of the object using the function name
B.	immediate ancestor class
C.	base class
D.	descendant class
Answer» B. immediate ancestor class

Discussion

507.	A C++ program contains a function with the header int function(double d, char c). Which of the following function headers could be used within the same program?
A.	char function(double d, char c)
B.	int function(int d, char c)
C.	both (a) and (b)
D.	neither (a) nor (b)
Answer» C. both (a) and (b)

Discussion

508.	Simple routines that programmers use as place holders while a system is being tested are called _____
A.	stubs
B.	stumps
C.	holders
D.	templates
Answer» B. stumps

Discussion

509.	The outline or the definition of a function is called its
A.	beta test
B.	forerunner
C.	outline
D.	prototype
Answer» E.

Discussion

510.	Which of the following statements opens a file named temp.dat for output?
A.	outFile.open("temp .dat");
B.	fileOut.output("temp .dat");
C.	openFile.out("temp .dat");
D.	fileOpen.out("temp .dat");
Answer» B. fileOut.output("temp .dat");

Discussion

511.	A function that is called automatically each time an object is destroyed is a
A.	constructor
B.	destructor
C.	destroyer
D.	terminator
Answer» C. destroyer

Discussion

512.	You mark the beginning of a function's block of code with the _____
A.	/
B.	*
C.	{
D.	}
Answer» D. }

Discussion

513.	Which of the following is a valid condition for an if statement? (The condition should be both syntactically and logically valid.)
A.	(age) > 65
B.	(age > 0 and < 10)
C.	(sales > 500 && < 800)
D.	(sales > 100 && sales <= 1000)
Answer» E.

Discussion

514.	A constructor always has
A.	communicational cohesion
B.	temporal cohesion
C.	logical cohesion
D.	no cohesion
Answer» C. logical cohesion

Discussion

515.	The type to be used in an instantiation of a class template follows ________
A.	the generic class name
B.	the keyword template
C.	the keyword class
D.	the template definition
Answer» B. the keyword template

Discussion

516.	A widget is to the blueprint for a widget as an object is to
A.	a member function
B.	a class
C.	an operator
D.	a data item
Answer» C. an operator

Discussion

517.	To use either an input or output file, the program must include the _____ header file
A.	filestream.h
B.	fstream.h
C.	instream.h
D.	inoutstream.h
Answer» C. instream.h

Discussion

518.	You construct a class in two sections, known as the _____
A.	header and body
B.	type and parameters
C.	declaration and implementation
D.	pointer and variable
Answer» D. pointer and variable

Discussion

519.	The last statement in a function is often a(n) _____
A.	return
B.	goodbye
C.	finish
D.	endfunction
Answer» B. goodbye

Discussion

520.	A default catch block catches
A.	all thrown objects
B.	no thrown objects
C.	any thrown object that has not been caught by an earlier catch block
D.	all thrown objects that have been caught by an earlier catch block
Answer» D. all thrown objects that have been caught by an earlier catch block

Discussion

521.	The main difference in operation between an 'if statement and a 'while' statement is
A.	the 'while' loop body is executed
B.	the body of the 'while' statement may be executed many times, the body of the 'if statements only once
C.	the conditional expression following the keyboard is evaluated differently
D.	All of the above
Answer» C. the conditional expression following the keyboard is evaluated differently

Discussion

522.	To be called object-oriented, a programming language must allow
A.	functions that return only a single value
B.	#include files
C.	inheritance
D.	All of the above
Answer» D. All of the above

Discussion

523.	If no constructors can specified for a derived class, objects of the derived class will use the constructors in the base class
A.	1
B.
C.	a character
D.	void
Answer» B.

Discussion

524.	Which of the following is(are) invalid string constant(s)?
A.	'7.15 pm'
B.	"i like e"
C.	"7.3el2"
D.	"1234el2"
Answer» B. "i like e"

Discussion

525.	Format flags may be combined using
A.	the bitwise OR operator (\|)
B.	the logical OR operator (\|\|)
C.	the bitwise AND operator (&)
D.	the logical AND operator (&&)
Answer» B. the logical OR operator (\|\|)

Discussion

526.	Which of the following assigns the number 5 to the area variable?
A.	area 1 = 5
B.	area = 5
C.	area == 5
D.	area --> 5
Answer» C. area == 5

Discussion

527.	The comma operator (,) is primarily used in conjunction with
A.	'for' statement
B.	'if-else' statement
C.	'do-while' statement
D.	All of the above
Answer» B. 'if-else' statement

Discussion

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

Discussion

529.	When you omit parameters from a function call, values can be provided by
A.	formal parameters
B.	reference parameters
C.	overloaded parameters
D.	default parameters
Answer» E.

Discussion

530.	The best form of coupling is _____
A.	complete
B.	tight
C.	loose
D.	free
Answer» D. free

Discussion

531.	Programmer-defined functions can be
A.	value-returning functions only
B.	void functions only
C.	either value-returning or void functions
D.	1
Answer» D. 1

Discussion

532.	A function whose purpose is to send messages to other functions is known as a _____
A.	dispatcher
B.	courier
C.	messenger
D.	sender
Answer» B. courier

Discussion

533.	You typically initialize a String variable to _____
A.	an asterisk
B.	a space enclosed in single quotes
C.	the number 0
D.	a zero-length string
Answer» E.

Discussion

534.	To expose a data member to the program, you must declare the data member in the _____ section of the class
A.	common
B.	exposed
C.	public
D.	unrestricted
Answer» D. unrestricted

Discussion

535.	If you create an instantiation of a class template with an int, and then create a second instantiation with a double, then
A.	you must precede each function call with the word int or double
B.	once a function is used as one type, it becomes unavailable for use with the other type
C.	there is no difference in the procedure to call a member function
D.	you cannot perform this operation in C++
Answer» B. once a function is used as one type, it becomes unavailable for use with the other type

Discussion

536.	The use of the break statement in a switch statement is
A.	optional
B.	compulsory
C.	not allowed. It gives an error message
D.	to check an error
Answer» B. compulsory

Discussion

537.	Which of the following are valid characters for a numeric literal constant?
A.	a decimal point
B.	the letter e
C.	a minus sign
D.	a plus sign
Answer» E.

Discussion

538.	Variables that are declared in a block are known as _____ variables to that block
A.	confined
B.	local
C.	global
D.	immediate
Answer» C. global

Discussion

539.	The #ifndef directive tests to see whether ________
A.	a class has been defined
B.	a variable has been given a value
C.	a class has no variable definitions
D.	any objects of the class have been instantiated
Answer» B. a variable has been given a value

Discussion

540.	Adding a derived class to a base class requires fundamental changes to the base class
A.	1
B.
Answer» C.

Discussion

541.	Sending a copy of data to a program module is called _______
A.	passing a value
B.	making a reference
C.	recursion
D.	setting a condition
Answer» B. making a reference

Discussion

542.	You can use C++ as a procedural, as well as an object-oriented, language
A.	1
B.
C.	all thrown objects
D.	no thrown objects
Answer» B.

Discussion

Explore topic-wise MCQs in Computer Science.

The word case used in the switch statement represents a

Which of the following can be used to declare the main function?

What does C++ append to the end of a string literal constant?

The function that takes arguments to set the bits of count is _____

Library header files usually contain

When a child class function is called, the compiler looks first for a matching function name in the _____

A C++ program contains a function with the header int function(double d, char c). Which of the following function headers could be used within the same program?

Simple routines that programmers use as place holders while a system is being tested are called _____

The outline or the definition of a function is called its

Which of the following statements opens a file named temp.dat for output?

A function that is called automatically each time an object is destroyed is a

You mark the beginning of a function's block of code with the _____

Which of the following is a valid condition for an if statement? (The condition should be both syntactically and logically valid.)

A constructor always has

The type to be used in an instantiation of a class template follows ________

A widget is to the blueprint for a widget as an object is to

To use either an input or output file, the program must include the _____ header file

You construct a class in two sections, known as the _____

The last statement in a function is often a(n) _____

A default catch block catches

The main difference in operation between an 'if statement and a 'while' statement is

To be called object-oriented, a programming language must allow

If no constructors can specified for a derived class, objects of the derived class will use the constructors in the base class

Which of the following is(are) invalid string constant(s)?

Format flags may be combined using

Which of the following assigns the number 5 to the area variable?

The comma operator (,) is primarily used in conjunction with

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

When you omit parameters from a function call, values can be provided by

The best form of coupling is _____

Programmer-defined functions can be

A function whose purpose is to send messages to other functions is known as a _____

You typically initialize a String variable to _____

To expose a data member to the program, you must declare the data member in the _____ section of the class

If you create an instantiation of a class template with an int, and then create a second instantiation with a double, then

The use of the break statement in a switch statement is

Which of the following are valid characters for a numeric literal constant?

Variables that are declared in a block are known as _____ variables to that block

The #ifndef directive tests to see whether ________

Adding a derived class to a base class requires fundamental changes to the base class

Sending a copy of data to a program module is called _______

You can use C++ as a procedural, as well as an object-oriented, language