Question 1

Friend functions may directly modify or access the private data members.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following would be an appropriate function declaration to add two rational numbers?

Accepted Answer

A)   void friend operator+ const Rational &left, const Rational &right) ;
B)   void operatator+ const Rational &left, const Rational &right) ;
C)   friend Rational operator+ const Rational &left, const Rational &right) ;
D)   Rational operator+ const Rational &left, const Rational &right) ;

Question 3

A friend function needs to be passed an object of the class. If the friend only needs to access the object, but not change its data members, then the object should be passed as _______________

Accepted Answer

a constant...

Question 4

How many parameters are there in a binary operator implemented as a friend?

Accepted Answer

A)   0
B)   1
C)   2
D)   as many as you need

Question 5

An operator that expects two parameters is called a ________ operator.

Accepted Answer

The answer of An operator that expects two parameters is...

Question 6

If obj1 and obj2 are both objects of a class that uses dynamic memory allocation, but the class does not have an assignment operator, what happens if you execute the following code?
Obj1=obj2;

Accepted Answer

A)   A syntax error occurs, you can not assign one object to another object without the = operator
B)   A run-time error occurs, because the C++ system does not know how to do the assignment.
C)   The pointers)  to the dynamically declared memory in obj2 are copied to the corresponding pointers in obj1.
D)   There is a complete and independent copy of all the dynamic memory from obj2 to obj1

Question 7

Write the function declaration for a copy constructor for a class named myClass

Accepted Answer

myClass co...

Question 8

The destructor for a class is called

Accepted Answer

A)   explicitly from the main program
B)   when the class is instantiated
C)   when the object of the class goes out of scope
D)   Only at the end of main

Question 9

An operator that expects only one parameter is called a ________ operator

Accepted Answer

The answer of An operator that expects only one parameter...

Question 10

Which of the following are valid declarations for an assignment operator for a class named myClass?

Accepted Answer

A)   void friend operator = myClass& left, const myClass& source) ;
B)   void operator = myClass& left, const myClass& source) ;
C)   void friend operator = const myClass& source) ;
D)   void operator = const myClass& source) ;

Question 11

Friend functions are members of the class.

Accepted Answer

A) True 
 B)False

Question 12

The copy constructor for a class is called

Accepted Answer

A)   when an object of the class is passed by value to a function.
B)   when an object of the class is initialized by another object of the class
C)   when a function returns an object of the class
D)   all of the above

Question 13

If a given task being performed by a function involves more than one object, then that function should normally be a __________ function.

Accepted Answer

The answer of If a given task being performed by...

Question 14

An overloaded extraction or insertion operator should return ___________

Accepted Answer

a referenc...

Question 15

Operators must be friends of the class.

Accepted Answer

A) True 
 B)False

Question 16

Given the following class, which is the correct function header for the display function?
Class Rational
{
Public:
Rational) ;
Rationalint numer, int denom) ;
Rationalint whole) ;
Int getNumerator) ;
Int getDenominator) ;
Friend void displayostream& out, const Rational& value) ;
Private:
Int numerator;
Int denominator;
};

Accepted Answer

A)   friend void displayostream& out, const Rational& value) 
B)   void displayostream& out, const Rational& value) 
C)   void Rational::displayostream& out, const Rational& value) 
D)   friend void Rational::displayostream& out, const Rational& value)

Question 17

Which of the following operators can not be overloaded?

Accepted Answer

A)   =
B)   ==
C)   .
D)   []

Question 18

The assignment operator must be a _________ of the class.

Accepted Answer

The answer of The assignment operator must be a _________...

Question 19

Who can access private data in a class?

Accepted Answer

A)   members of the class
B)   friends of the class
C)   everyone
D)   B and C
E)   no one

Question 20

The following is a properly declared overloaded insertion operator for myClass.
ostream& operator <<ostream &out, const myClass &obj);

Accepted Answer

A) True 
 B)False

Exam 11: Friends, Overloaded Operators, and Arrays in Classes

Who can access private data in a class?

Correct Answer
verified

The assignment operator must be a _________ of the class.

Correct Answer
verified

How many parameters are there in a binary operator implemented as a friend?

Correct Answer
verified

An overloaded extraction or insertion operator should return ___________

Correct Answer
verified
a referenc...
View Answer

Friend functions may directly modify or access the private data members.

Correct Answer
verified

The copy constructor for a class is called

Correct Answer
verified

An operator that expects two parameters is called a ________ operator.

Correct Answer
verified

Write the function declaration for a copy constructor for a class named myClass

Correct Answer
verified
myClass co...
View Answer

Operators must be friends of the class.

Correct Answer
verified

The destructor for a class is called

Correct Answer
verified

If obj1 and obj2 are both objects of a class that uses dynamic memory allocation, but the class does not have an assignment operator, what happens if you execute the following code? Obj1=obj2;

Correct Answer
verified

Which of the following operators can not be overloaded?

Correct Answer
verified

If a given task being performed by a function involves more than one object, then that function should normally be a __________ function.

Correct Answer
verified

A friend function needs to be passed an object of the class. If the friend only needs to access the object, but not change its data members, then the object should be passed as _______________

Correct Answer
verified
a constant...
View Answer

Correct Answer
verified

An operator that expects only one parameter is called a ________ operator

Correct Answer
verified

Friend functions are members of the class.

Correct Answer
verified

Which of the following are valid declarations for an assignment operator for a class named myClass?

Correct Answer
verified

The following is a properly declared overloaded insertion operator for myClass. ostream& operator <<ostream &out, const myClass &obj);

Correct Answer
verified

Which of the following would be an appropriate function declaration to add two rational numbers?

Correct Answer
verified

Exam 11: Friends, Overloaded Operators, and Arrays in Classes

Who can access private data in a class?

Correct AnswerverifiedShow Answer

The assignment operator must be a _________ of the class.

Correct AnswerverifiedShow Answer

How many parameters are there in a binary operator implemented as a friend?

Correct AnswerverifiedShow Answer

An overloaded extraction or insertion operator should return ___________

Correct Answerverifieda referenc...View AnswerShow Answer

Friend functions may directly modify or access the private data members.

Correct AnswerverifiedShow Answer

The copy constructor for a class is called

Correct AnswerverifiedShow Answer

An operator that expects two parameters is called a ________ operator.

Correct AnswerverifiedShow Answer

Write the function declaration for a copy constructor for a class named myClass

Correct AnswerverifiedmyClass co...View AnswerShow Answer

Operators must be friends of the class.

Correct AnswerverifiedShow Answer

The destructor for a class is called

Correct AnswerverifiedShow Answer

If obj1 and obj2 are both objects of a class that uses dynamic memory allocation, but the class does not have an assignment operator, what happens if you execute the following code? Obj1=obj2;

Correct AnswerverifiedShow Answer

Which of the following operators can not be overloaded?

Correct AnswerverifiedShow Answer

If a given task being performed by a function involves more than one object, then that function should normally be a __________ function.

Correct AnswerverifiedShow Answer

A friend function needs to be passed an object of the class. If the friend only needs to access the object, but not change its data members, then the object should be passed as _______________

Correct Answerverifieda constant...View AnswerShow Answer

Correct AnswerverifiedShow Answer

An operator that expects only one parameter is called a ________ operator

Correct AnswerverifiedShow Answer

Friend functions are members of the class.

Correct AnswerverifiedShow Answer

Which of the following are valid declarations for an assignment operator for a class named myClass?

Correct AnswerverifiedShow Answer

The following is a properly declared overloaded insertion operator for myClass. ostream& operator <<ostream &out, const myClass &obj);

Correct AnswerverifiedShow Answer

Which of the following would be an appropriate function declaration to add two rational numbers?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified
a referenc...
View Answer

Correct Answer
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Correct Answer
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myClass co...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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a constant...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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