4320 + Mcqs in Computer Science Page 18 McqOptions

851.	An array element is accessed using
A.	a first-in-first-out approach
B.	the dot operator
C.	a member name
D.	an index number
Answer» E.

Discussion

852.	The program can access the private members of a class
A.	directly
B.	only through other private members of the class
C.	only through other public members of the class
D.	None of the above - the program cannot access the private members of a class in any way
Answer» D. None of the above - the program cannot access the private members of a class in any way

Discussion

853.	Within a program, you can instantiate ________that have a class template type
A.	classes
B.	functions
C.	parameters
D.	objects
Answer» E.

Discussion

854.	The rules to any programming language are its _______
A.	syntax
B.	interpretation
C.	logic
D.	customs
Answer» B. interpretation

Discussion

855.	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

856.	Which of the following backslash codes used for bell?
A.	b
B.	a
C.	r
D.	s
E.	None of the above
Answer» C. r

Discussion

857.	The last statement in a value-returning function is always _____
A.	};
B.	result expression;
C.	return;
D.	return expression;
Answer» E.

Discussion

858.	It is sometimes useful to specify a class from which no objects will ever be created
A.	True
B.	False
Answer» B. False

Discussion

859.	The statement i*=3 is equivalent to
A.	i = 3*
B.	i = 3
C.	i* = 3
D.	i = i * 3
E.	None of the above
Answer» E. None of the above

Discussion

860.	The complement operator is represented by the symbol
A.	~
B.	^
C.	i
D.	<
E.	None of the above
Answer» B. ^

Discussion

861.	It is illegal to make objects of one class members of another class
A.	True
B.	False
C.	depends upon the kind of object
Answer» C. depends upon the kind of object

Discussion

862.	Catch blocks must _____
A.	appear in every object-oriented program
B.	appear within try blocks
C.	appear immediately after throw statements
D.	appear immediately after try blocks
Answer» E.

Discussion

863.	The number 125.35 is a _____
A.	character literal constant
B.	numeric literal constant
C.	string literal constant
D.	variable
Answer» C. string literal constant

Discussion

864.	When a class serves as a base class to others, _____
A.	all of its members are inherited
B.	all of its members are inherited, except for any private members
C.	all of its members are inherited, except for any protected members
D.	None of its members is inherited unless specifically "listed
Answer» C. all of its members are inherited, except for any protected members

Discussion

865.	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

866.	A class named student must have a constructor whose name is
A.	student
B.	~student
C.	constructor
D.	any legal C++ name.
Answer» B. ~student

Discussion

867.	A class hierarchy
A.	describes "is a kind of" relationships
B.	describes "has a" relationships
C.	shows the same relationships as an organization chart
D.	shows the same relationships as a family tree
Answer» B. describes "has a" relationships

Discussion

868.	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)
E.	sqrt (5, 3)
Answer» E. sqrt (5, 3)

Discussion

869.	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
E.	None of the above
Answer» D. select the more equal of the two values

Discussion

870.	Which of the following, if any, are valid names for variables?
A.	amt.Sold
B.	amt-Sold
C.	amt_Sold
D.	98Sold
E.	None of the above are valid names for variables
Answer» D. 98Sold

Discussion

871.	Assume you want to compare the character stored in the initial variable to the letter a. Which of the following conditions should you use in the if statement? (Be sure the condition will handle a or A.)
A.	(initial = 'a' or 'A')
B.	(initial == 'a' or 'A')
C.	(toupper(initial) = 'A')
D.	(toupper(initial) == 'A')
Answer» E.

Discussion

872.	You can override a class's inherited access to make an individual member's access more ______
A.	liberal
B.	conservative
C.	either (a) or (b)
D.	neither (a) nor (b)
Answer» C. either (a) or (b)

Discussion

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

Discussion

874.	A function that is prototyped as double calculate(int num); may______
A.	receive an integer constant such as 5
B.	receive an integer variable
C.	either (a) or (b)
D.	neither (a) nor (b)
Answer» D. neither (a) nor (b)

Discussion

875.	Passing a variable pointer as a constant _____
A.	protects the contents pointed to by the pointer from change
B.	eliminates the need to name the pointer in the function
C.	eliminates the need to give the pointer a type in the function
D.	causes a copy of the pointer to be produced in the function
Answer» B. eliminates the need to name the pointer in the function

Discussion

876.	The _____ function returns the uppercase equivalent of a character
A.	caseupper
B.	charupper
C.	toupper
D.	uCase
E.	upper
Answer» D. uCase

Discussion

877.	When you instantiate a derived class object, a constructor for the derived class _____
A.	is not called
B.	is called prior to the base class constructor
C.	is called simultaneously with the base class constructor
D.	None of the above
Answer» E.

Discussion

878.	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

879.	Software that can be used in applications other than the one for which it was originally written is called
A.	recyclable
B.	inherited
C.	reusable
D.	cheating
Answer» D. cheating

Discussion

880.	The statement double total = 0.0; performs _____
A.	assignment
B.	initialization
C.	rationalization
D.	polymorphism
Answer» C. rationalization

Discussion

881.	The two parts of a function are the
A.	header and footer
B.	declarations and statements
C.	legs and feet
D.	header and body
Answer» E.

Discussion

882.	The general principle underlying object-oriented error handling is that a called function should __________
A.	neither check for, nor handle errors
B.	check for errors but not be required to handle any detected
C.	handle errors, but not check for them
D.	both check for and handle errors
Answer» C. handle errors, but not check for them

Discussion

883.	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

884.	The code that you enter into a C++ program is called _____
A.	console code
B.	object code
C.	project code
D.	source code
Answer» E.

Discussion

885.	If a base class member is private, then
A.	if a derived class uses the public access specifier, the data member becomes public
B.	if a derived class uses the protected access specifier, the data member becomes protected
C.	both (a) and (b)
D.	neither (a) nor (b)
Answer» E.

Discussion

886.	Which of the following instructions tells C++ to merge the source code from the iostream.h file into the current file?
A.	#include <iostream.h>
B.	#include iostream.h
C.	#include <iostream.h>
D.	#merge iostream.h
E.	None of the above
Answer» F.

Discussion

887.	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

888.	The String data type is an extension of the _____ data type
A.	Character
B.	Double
C.	Letter
D.	Long
E.	Text
Answer» B. Double

Discussion

889.	When you define an object that is a member of a class, such as Student Abby; _____
A.	a block of memory is set aside and all data members are assigned valid values
B.	a block of memory is set aside
C.	no memory is set aside until values are defined
D.	no memory is set aside, but valid values are assigned to data members
Answer» C. no memory is set aside until values are defined

Discussion

890.	A program can directly access the _____ members of a class
A.	hidden
B.	private
C.	public
D.	both (b) and (c)
Answer» D. both (b) and (c)

Discussion

891.	A variable w with a value 67 may be defined with _______
A.	int w = 67;
B.	int w(67);
C.	int 67(w);
D.	both (a) and (b), but not (c).
Answer» E.

Discussion

892.	An expression contains relational, assignment and arithmetic operators. In the absence of parentheses, the order of evaluation will be
A.	assignment, relational, arithmetic
B.	arithmetic, relational, assignment
C.	relational, arithmetic, assignment
D.	assignment, arithmetic, relational
E.	None of the above
Answer» C. relational, arithmetic, assignment

Discussion

893.	The keyword virtual indicates that
A.	a derived class has public access to a base class
B.	more than one base class exists
C.	a base class should be used only once in inheritance
D.	a derived class should have more than one base class constructed
Answer» D. a derived class should have more than one base class constructed

Discussion

894.	The instruction "If it's raining outside, then take an umbrella to work" is an example of the _____ structure
A.	control
B.	repetition
C.	selection
D.	sequence
E.	switching
Answer» D. sequence

Discussion

895.	Which of the following stream manipulators advances the cursor to the next line on the computer screen?
A.	adin
B.	advin
C.	edlin
D.	endl
E.	lineadv
Answer» E. lineadv

Discussion

896.	6.5 is a _____ constant
A.	character literal
B.	named literal
C.	numeric literal
D.	string literal
Answer» D. string literal

Discussion

897.	The time and memory involved in calling a function represent the function's _____
A.	prototype
B.	overhead
C.	cost
D.	burden
Answer» C. cost

Discussion

898.	Which function is most likely to have procedural cohesion?
A.	main()
B.	findSquareRoot()
C.	getSaleSubtractDiscountAddTax()
D.	openFiles()
Answer» B. findSquareRoot()

Discussion

899.	A C++ term meaning "generic" is
A.	argument
B.	parameterized
C.	universal
D.	global
Answer» C. universal

Discussion

900.	Before object-oriented exception handling was practiced, _____
A.	no run-time errors occurred
B.	programmers could not deal with run-time errors
C.	the most popular error-handling method was to terminate the program
D.	the most popular error-handling method was to throw an exception
Answer» D. the most popular error-handling method was to throw an exception

Discussion

Explore topic-wise MCQs in Engineering.

An array element is accessed using

The program can access the private members of a class

Within a program, you can instantiate ________that have a class template type

The rules to any programming language are its _______

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

Which of the following backslash codes used for bell?

The last statement in a value-returning function is always _____

It is sometimes useful to specify a class from which no objects will ever be created

The statement i*=3 is equivalent to

The complement operator is represented by the symbol

It is illegal to make objects of one class members of another class

Catch blocks must _____

The number 125.35 is a _____

When a class serves as a base class to others, _____

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

A class named student must have a constructor whose name is

A class hierarchy

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

The purpose of a conditional operator is to

Which of the following, if any, are valid names for variables?

Assume you want to compare the character stored in the initial variable to the letter a. Which of the following conditions should you use in the if statement? (Be sure the condition will handle a or A.)

You can override a class's inherited access to make an individual member's access more ______

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

A function that is prototyped as double calculate(int num); may______

Passing a variable pointer as a constant _____

The _____ function returns the uppercase equivalent of a character

When you instantiate a derived class object, a constructor for the derived class _____

A constructor may be _____

Software that can be used in applications other than the one for which it was originally written is called

The statement double total = 0.0; performs _____

The two parts of a function are the

The general principle underlying object-oriented error handling is that a called function should __________

Reference variables and const class member

The code that you enter into a C++ program is called _____

If a base class member is private, then

Which of the following instructions tells C++ to merge the source code from the iostream.h file into the current file?

Library header files usually contain

The String data type is an extension of the _____ data type

When you define an object that is a member of a class, such as Student Abby; _____

A program can directly access the _____ members of a class

A variable w with a value 67 may be defined with _______

An expression contains relational, assignment and arithmetic operators. In the absence of parentheses, the order of evaluation will be

The keyword virtual indicates that

The instruction "If it's raining outside, then take an umbrella to work" is an example of the _____ structure

Which of the following stream manipulators advances the cursor to the next line on the computer screen?

6.5 is a _____ constant

The time and memory involved in calling a function represent the function's _____

Which function is most likely to have procedural cohesion?

A C++ term meaning "generic" is

Before object-oriented exception handling was practiced, _____