Question

QUIZ 9

QUESTION 1

1. An enumeration contains enumerators that represent

   	a.	the functions for the enumeration
   	b.	the constants for the enumeration
   	c.	the operators for the enumeration
   	d.	the variables for the enumeration

1 points   

QUESTION 2

1. Which of the following problems is not a problem with using unscoped enumerations?

   	a.	The code for using them is more complex.
   	b.	They allow you to accidentally convert an enumerator to an integer type.
   	c.	They can lead to name collisions.
   	d.	They allow you to compare an enumerator to an integer using relational operators.

1 points   

QUESTION 3

1. Given the following enumeration:
   enum class Terms {
       net_30_days,
       net_60_days,
       net_90_days
   };
   Which statement would you use to assign the value of the net_30_days enumerator to a variable named terms?

   	a.	Terms terms = Terms.net_30_days;
   	b.	Terms terms = Terms::net_30_days;
   	c.	Terms terms = Terms(net_30_days);

1 points   

QUESTION 4

1. Given the following Product structure:
   struct Product {
       string name;
       double price;
       int quantity;
       bool equals(const Product&);
   };
   how would you define the equals function so two products are equal if their names and prices are equal?

   	a.	bool equals(const Product& to_compare) {     return (name == to_compare.name && price == to_compare.price); }
   	b.	bool equals(const Product& to_compare) {     return (name == to_compare.name || price == to_compare.price); }
   	c.	bool Product::equals(const Product& to_compare) {     return (name == to_compare.name || price == to_compare.price); }
   	d.	bool Product::equals(const Product& to_compare) {     return (name == to_compare.name && price == to_compare.price); }

1 points   

QUESTION 5

1. If you don’t initialize a structure or set default values for its data members in the structure definition,

   	a.	the data members will contain whatever values happen to be at the memory location where they’re created
   	b.	you have to assign values to the data members before you can use the structure
   	c.	all of the members will contain 0 or null depending on the data type

1 points   

QUESTION 6

1. The advantage of returning a structure type from a function when compared to returning a fundamental type is that

   	a.	the function can return multiple values
   	b.	the function can return an object
   	c.	the function doesn’t need to include a return statement
   	d.	all of the above
   	e.	a and b only

1 points   

QUESTION 7

1. How would you modify the following enumeration to change the underlying enumerator type to char?
   enum class Suit {
       diamonds = 'd',
       hearts = 'h',
       clubs = 'c',
       spades = 's'
   };

   	a.	enum class Suit : char {     diamonds = 'd',     hearts = 'h',     clubs = 'c',     spades = 's' };
   	b.	enum class Suit {     char diamonds = 'd',     char hearts = 'h',     char clubs = 'c',     char spades = 's' };
   	c.	enum class : char Suit {     diamonds = 'd',     hearts = 'h',     clubs = 'c',     spades = 's' };
   	d.	enum class Suit char {     diamonds = 'd',     hearts = 'h',     clubs = 'c',     spades = 's' };

1 points   

QUESTION 8

1. Code Example 9-1
   struct Product {
       string name;
       double price;
       int quantity;
   };

   (Refer to Code Example 9-1.) What happens if you try to compare two Product objects using the following code?
   Product p1 = { "hammer", 14.99, 15 };
   Product p2 = { "hammer", 16.29, 12 };
   if (p1 == p2) {
       cout << "The products are equal.";
   }
   else {
       cout << "The products are not equal.";
   }

   	a.	It displays a message that the products are not equal because they have different prices and quantities.
   	b.	It displays a message that the products are equal because the have the same name.
   	c.	A compile-time error occurs because there is no equality operator for the Product structure.

1 points   

QUESTION 9

1. Given the following Product structure:
   struct Product {
       string name;
       double price;
       int quantity;
       bool operator==(const Product& to_compare) {
           return (name == to_compare.name && price == to_compare.price);
       }
   };
   what statement would you use to test if two Product objects named p1 and p2 are equal?

   	a.	bool duplicate = p1.==(p2);
   	b.	bool duplicate = (p1 == p2);
   	c.	bool duplicate = p1.operator==(p2);
   	d.	bool duplicate = (p1 operator== p2);

1 points   

QUESTION 10

1. If you don’t specify the values of the enumerators in an enumeration, they are stored as

   	a.	sequential char values starting at 'a'
   	b.	sequential int values starting at 1
   	c.	sequential int values starting at 0
   	d.	sequential char values starting at 'A'

Answer 1

1. b) the constants for the enumeration

Explanation:

Enumeration (or enum) is a user defined data type in C. It is mainly used to assign names to integral constants, the names make a program easy to read and maintain.

2. They allow you to compare an enumerator to an integer using relational operators.

3. Terms terms = Terms.net_30_days;

4.

bool Product::equals(const Product& to_compare) {
    return (name == to_compare.name && price == to_compare.price);
}

NOTE: As per Chegg policy, I am allowed to answer only 3 questions (including sub-parts) on a single post. I have gone ahead and answered 4. Kindly post the remaining questions separately and I will try to answer them. Sorry for the inconvenience caused.