In an array declaration, “ size declarator ” indicates the number of elements that the array will have. Hence, the correct answer is option “ B ”.

Question

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Answer 1

Expert Solution & Answer

Chapter 7, Problem 1MC

Program Description Answer

In an array declaration, “size declarator” indicates the number of elements that the array will have.

Hence, the correct answer is option “B”.

Expert Solution & Answer

Explanation of Solution

Size declarator:

In an array the “size declarator” must be a non-negative integer expression. It may be a variable or a literal value. It is a common practice to use a final variable as a size declarator.

Example:

final int NUM_ELEMENTS = 6;

int[] numbers = new int[NUM_ELEMENTS];

Explanation for wrong answers:

a.Subscript:

A “subscript” is used as an index to pinpoint a specific element within an array.

Hence, the option “A” is wrong.

c.element sum:

The “element sum” is used to add the numbers of element in an array.

Hence, the option “C” is wrong.

d.Reference variable:

The user declare a “reference variable” and use the new keyword to create an instance of the array in memory. The reference variable can be declared as follows:

numbers = new int[6];

Hence, the option “D” is wrong.

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8. Name and Email AddressesWrite a program that keeps names and email addresses in a dictionary as key-value pairs. The program should display a menu that lets the user look up a person’s email address, add a new name and email address, change an existing email address, and delete an existing name and email address. The program should pickle the dictionary and save it to a file when the user exits the program. Each time the program starts, it should retrieve the dictionary from the file and unpickle it. How would the user be able to use the program?

Please solve and answer the question correctly please. Thank you!!

Answer 2

Expert Solution & Answer

Chapter 7, Problem 1MC

Program Description Answer

In an array declaration, “size declarator” indicates the number of elements that the array will have.

Hence, the correct answer is option “B”.

Expert Solution & Answer

Explanation of Solution

Size declarator:

In an array the “size declarator” must be a non-negative integer expression. It may be a variable or a literal value. It is a common practice to use a final variable as a size declarator.

Example:

final int NUM_ELEMENTS = 6;

int[] numbers = new int[NUM_ELEMENTS];

Explanation for wrong answers:

a.Subscript:

A “subscript” is used as an index to pinpoint a specific element within an array.

Hence, the option “A” is wrong.

c.element sum:

The “element sum” is used to add the numbers of element in an array.

Hence, the option “C” is wrong.

d.Reference variable:

The user declare a “reference variable” and use the new keyword to create an instance of the array in memory. The reference variable can be declared as follows:

numbers = new int[6];

Hence, the option “D” is wrong.

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Answer 3

Expert Solution & Answer

Chapter 7, Problem 1MC

Program Description Answer

In an array declaration, “size declarator” indicates the number of elements that the array will have.

Hence, the correct answer is option “B”.

Expert Solution & Answer

Explanation of Solution

Size declarator:

In an array the “size declarator” must be a non-negative integer expression. It may be a variable or a literal value. It is a common practice to use a final variable as a size declarator.

Example:

final int NUM_ELEMENTS = 6;

int[] numbers = new int[NUM_ELEMENTS];

Explanation for wrong answers:

a.Subscript:

A “subscript” is used as an index to pinpoint a specific element within an array.

Hence, the option “A” is wrong.

c.element sum:

The “element sum” is used to add the numbers of element in an array.

Hence, the option “C” is wrong.

d.Reference variable:

The user declare a “reference variable” and use the new keyword to create an instance of the array in memory. The reference variable can be declared as follows:

numbers = new int[6];

Hence, the option “D” is wrong.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Expert Solution & Answer

Chapter 7, Problem 1MC

Program Description Answer

In an array declaration, “size declarator” indicates the number of elements that the array will have.

Hence, the correct answer is option “B”.

Expert Solution & Answer

Explanation of Solution

Size declarator:

In an array the “size declarator” must be a non-negative integer expression. It may be a variable or a literal value. It is a common practice to use a final variable as a size declarator.

Example:

final int NUM_ELEMENTS = 6;

int[] numbers = new int[NUM_ELEMENTS];

Explanation for wrong answers:

a.Subscript:

A “subscript” is used as an index to pinpoint a specific element within an array.

Hence, the option “A” is wrong.

c.element sum:

The “element sum” is used to add the numbers of element in an array.

Hence, the option “C” is wrong.

d.Reference variable:

The user declare a “reference variable” and use the new keyword to create an instance of the array in memory. The reference variable can be declared as follows:

numbers = new int[6];

Hence, the option “D” is wrong.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Expert Solution & Answer

Answer 6

Expert Solution & Answer

Answer 7

Chapter 7, Problem 1MC

Program Description Answer

In an array declaration, “size declarator” indicates the number of elements that the array will have.

Hence, the correct answer is option “B”.

Expert Solution & Answer

Explanation of Solution

Size declarator:

In an array the “size declarator” must be a non-negative integer expression. It may be a variable or a literal value. It is a common practice to use a final variable as a size declarator.

Example:

final int NUM_ELEMENTS = 6;

int[] numbers = new int[NUM_ELEMENTS];

Explanation for wrong answers:

a.Subscript:

A “subscript” is used as an index to pinpoint a specific element within an array.

Hence, the option “A” is wrong.

c.element sum:

The “element sum” is used to add the numbers of element in an array.

Hence, the option “C” is wrong.

d.Reference variable:

The user declare a “reference variable” and use the new keyword to create an instance of the array in memory. The reference variable can be declared as follows:

numbers = new int[6];

Hence, the option “D” is wrong.

Answer 8

Chapter 7, Problem 1MC

Program Description Answer

In an array declaration, “size declarator” indicates the number of elements that the array will have.

Hence, the correct answer is option “B”.

Expert Solution & Answer

Explanation of Solution

Size declarator:

In an array the “size declarator” must be a non-negative integer expression. It may be a variable or a literal value. It is a common practice to use a final variable as a size declarator.

Example:

final int NUM_ELEMENTS = 6;

int[] numbers = new int[NUM_ELEMENTS];

Explanation for wrong answers:

a.Subscript:

A “subscript” is used as an index to pinpoint a specific element within an array.

Hence, the option “A” is wrong.

c.element sum:

The “element sum” is used to add the numbers of element in an array.

Hence, the option “C” is wrong.

d.Reference variable:

The user declare a “reference variable” and use the new keyword to create an instance of the array in memory. The reference variable can be declared as follows:

numbers = new int[6];

Hence, the option “D” is wrong.

Answer 9

Chapter 7, Problem 1MC

Program Description Answer

In an array declaration, “size declarator” indicates the number of elements that the array will have.

Hence, the correct answer is option “B”.

Answer 10

Expert Solution & Answer

Explanation of Solution

Size declarator:

In an array the “size declarator” must be a non-negative integer expression. It may be a variable or a literal value. It is a common practice to use a final variable as a size declarator.

Example:

final int NUM_ELEMENTS = 6;

int[] numbers = new int[NUM_ELEMENTS];

Explanation for wrong answers:

a.Subscript:

A “subscript” is used as an index to pinpoint a specific element within an array.

Hence, the option “A” is wrong.

c.element sum:

The “element sum” is used to add the numbers of element in an array.

Hence, the option “C” is wrong.

d.Reference variable:

The user declare a “reference variable” and use the new keyword to create an instance of the array in memory. The reference variable can be declared as follows:

numbers = new int[6];

Hence, the option “D” is wrong.