C++ Arrays Quiz: Valid Definition Explained

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Questions and Answers

Unlike regular variables, arrays can hold multiple

variables.

data types.

values. (correct)

named constants.

operators.

The amount of memory used by an array depends solely on the number of elements the array can hold.

False

To access an array element, use the array name and the element's

value.

subscript. (correct)

size declarator.

data type.

name.

If a C++ program contains the following array definition `int score[10];`, the following statement would store 100 in the first array element: `score[1] = 100;`

False Signup and view all the answers

The statement `int grades[ ] = {100, 90, 99, 80 };` is an example of

implicit array sizing. Signup and view all the answers

Which of the following statements correctly initialize the value variable?

All of the above. Signup and view all the answers

Which of the following statements will correctly carry out the operation stated in the comment to its right?

None of the above. Signup and view all the answers

By using the same _____, you can build relationships between data stored in two or more arrays.

subscript Signup and view all the answers

To step through a one-dimensional array, accessing the elements one by one, it would be most appropriate to use a _____ loop.

a for Signup and view all the answers

Arrays can be passed to functions, but individual array elements cannot be.

False Signup and view all the answers

When an array is passed to a function, it is actually ______ the array that is passed.

the starting memory address of Signup and view all the answers

When you pass an array as an argument to a function, the function can modify the contents of the array.

True Signup and view all the answers

A two-dimensional array can be viewed as

any of the above. Signup and view all the answers

The elements of an array can be

any of the above. Signup and view all the answers

An element of a two-dimensional array is referenced by the array name and two subscripts, first the element row number and then the element column number.

True Signup and view all the answers

The following statement `for(int val : myArray) cout << val << " ";` is an example of a(n)

range-based for loop Signup and view all the answers

What does the following statement do? `typedef int oneDArray[20];`

It makes <code>oneDArray</code> an alias for a data type that holds 20 integers. Signup and view all the answers

When you create a vector, it is unnecessary to specify how many elements it will hold because it will expand in size as you add new values to it.

True Signup and view all the answers

The range-based for loop may be used with arrays, but not with vectors.

False Signup and view all the answers

If `employee` is an array of objects with a public member function named `setHourlyWage`, the following statement correctly calls this method for `employee[2]`: `employee.setHourlyWage[2](20.00);`

False Signup and view all the answers

An array can store multiple values, but the values must be

all the same data type. Signup and view all the answers

The amount of memory used by an array depends upon the array's data type and how many elements it can hold.

True Signup and view all the answers

The size of an array is the number of elements that have data stored in them.

False Signup and view all the answers

Subscript numbering in C++

automatically begins with zero. Signup and view all the answers

The following statement is a valid C++ array definition: `double money[25.00];`

False Signup and view all the answers

Each individual element of an array can be accessed by the array name and an element number, called a subscript.

True Signup and view all the answers

An individual array element can be processed or passed to a function just like a regular C++ variable.

True Signup and view all the answers

The following array definition is legal because C++ allows arrays to be implicitly sized. `int grades[ ];`

False Signup and view all the answers

You can assign the contents of one array to another by using

none of the above. Signup and view all the answers

When an array is passed to a function, it is actually ______ the array that is/are passed.

False Signup and view all the answers

An array can be returned by a function as well as passed to a function.

True Signup and view all the answers

After carrying out the following two statements, `sales` will have been created as a one-dimensional array that can hold 20 double values. `typedef salesArray double[20]; salesArray sales;`

False Signup and view all the answers

If the `scores` array is defined like this: `int scores[] = {4, 7, 4, 8, 9};`, what will the following statement display: `cout << scores[4];`

9 Signup and view all the answers

To add up all the values in a two-dimensional array it would be best to use

a nested for loop Signup and view all the answers

In C++, if you attempt to store more data in an array than it can hold, the compiler will issue an error.

False Signup and view all the answers

Any of the following statements can be used to initialize the integer variable `num` to 7: `int num = 7; int num(7); int num{7};`

True Signup and view all the answers

On each iteration of the following range-based for loop `for (int element : myArray) cout << element << endl;`, the variable `element` holds

an array value. Signup and view all the answers

The following two arrays `string deptName[3] = {"Manufacturing", "Sales", "Business Office"};` and `double deptBudget[3] = {200000.0, 60000.0, 50000.0};` are an example of _____ arrays.

parallel Signup and view all the answers

Elements of vectors can be accessed by using the vector name and a subscript, similarly to how array elements are accessed.

True Signup and view all the answers

If `employee` is an array of objects with a public member function named `setHoursWorked`, which of the following statements correctly calls that function for the employee object in array element 5?

employee[5].setHoursWorked(40); Signup and view all the answers

Study Notes

Chapter 8 Test 1

Arrays hold multiple values of the same data type.
Array elements are accessed by their position (subscript).
Unlike regular variables, arrays hold multiple values of the same data type, values, and variables.
The amount of memory used by an array depends on the number of elements it can hold, not the values stored in them.
If an array is defined as int score[10]; then score[1]=100; will not store 100 in the first element, but in the second element

Chapter 8 Test 2

Arrays store values of the same data type.
Subscript numbering in C++ starts at 0.
An element of a 2D array is referenced by row number then column number.
Arrays can be processed and passed to functions.
Arrays can be passed to functions to function can modify the contents.
You create a vector, you do not specify the size, it expands as you add values.
Using the assignment operator, the contents of one array can be assigned to another array.

General C++ Array Concepts

Arrays hold multiple values of the same data type.
Accessing array elements using subscripts (an index).
When passing an array to a function the address of the first element is passed.
Arrays can be initialized with values at declaration time
Array element values can be changed individually
Arrays can be used to store sequences of related data.
Copying elements from one array to another is possible
Arrays can store primitive data types such as characters, integers, or doubles
Arrays can store structured data like objects (structs/classes).

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Test your understanding of arrays in C++ with this Chapter 8 quiz. It covers fundamental concepts including array initialization, accessing elements, and the differences between arrays and regular variables. Challenge yourself with questions on both one-dimensional and two-dimensional arrays.

C++ Arrays Chapter 8 Quiz

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Podcast

Questions and Answers

Unlike regular variables, arrays can hold multiple

The amount of memory used by an array depends solely on the number of elements the array can hold.

To access an array element, use the array name and the element's

If a C++ program contains the following array definition int score[10];, the following statement would store 100 in the first array element: score[1] = 100;

The statement int grades[ ] = {100, 90, 99, 80 }; is an example of

Which of the following statements correctly initialize the value variable?

Which of the following statements will correctly carry out the operation stated in the comment to its right?

By using the same _____, you can build relationships between data stored in two or more arrays.

To step through a one-dimensional array, accessing the elements one by one, it would be most appropriate to use a _____ loop.

Arrays can be passed to functions, but individual array elements cannot be.

When an array is passed to a function, it is actually ______ the array that is passed.

When you pass an array as an argument to a function, the function can modify the contents of the array.

A two-dimensional array can be viewed as

The elements of an array can be

An element of a two-dimensional array is referenced by the array name and two subscripts, first the element row number and then the element column number.

The following statement for(int val : myArray) cout << val << " "; is an example of a(n)

What does the following statement do? typedef int oneDArray[20];

When you create a vector, it is unnecessary to specify how many elements it will hold because it will expand in size as you add new values to it.

The range-based for loop may be used with arrays, but not with vectors.

If employee is an array of objects with a public member function named setHourlyWage, the following statement correctly calls this method for employee[2]: employee.setHourlyWage[2](20.00);

An array can store multiple values, but the values must be

The amount of memory used by an array depends upon the array's data type and how many elements it can hold.

The size of an array is the number of elements that have data stored in them.

Subscript numbering in C++

The following statement is a valid C++ array definition: double money[25.00];

Each individual element of an array can be accessed by the array name and an element number, called a subscript.

An individual array element can be processed or passed to a function just like a regular C++ variable.

The following array definition is legal because C++ allows arrays to be implicitly sized. int grades[ ];

You can assign the contents of one array to another by using

When an array is passed to a function, it is actually ______ the array that is/are passed.

An array can be returned by a function as well as passed to a function.

After carrying out the following two statements, sales will have been created as a one-dimensional array that can hold 20 double values. typedef salesArray double[20]; salesArray sales;

If the scores array is defined like this: int scores[] = {4, 7, 4, 8, 9};, what will the following statement display: cout << scores[4];

To add up all the values in a two-dimensional array it would be best to use

In C++, if you attempt to store more data in an array than it can hold, the compiler will issue an error.

Any of the following statements can be used to initialize the integer variable num to 7: int num = 7; int num(7); int num{7};

On each iteration of the following range-based for loop for (int element : myArray) cout << element << endl;, the variable element holds

The following two arrays string deptName[3] = {"Manufacturing", "Sales", "Business Office"}; and double deptBudget[3] = {200000.0, 60000.0, 50000.0}; are an example of _____ arrays.

Elements of vectors can be accessed by using the vector name and a subscript, similarly to how array elements are accessed.

If employee is an array of objects with a public member function named setHoursWorked, which of the following statements correctly calls that function for the employee object in array element 5?

Study Notes

Chapter 8 Test 1

Chapter 8 Test 2

General C++ Array Concepts

Studying That Suits You

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If a C++ program contains the following array definition `int score[10];`, the following statement would store 100 in the first array element: `score[1] = 100;`

The statement `int grades[ ] = {100, 90, 99, 80 };` is an example of

The following statement `for(int val : myArray) cout << val << " ";` is an example of a(n)

What does the following statement do? `typedef int oneDArray[20];`

If `employee` is an array of objects with a public member function named `setHourlyWage`, the following statement correctly calls this method for `employee[2]`: `employee.setHourlyWage[2](20.00);`

The following statement is a valid C++ array definition: `double money[25.00];`

The following array definition is legal because C++ allows arrays to be implicitly sized. `int grades[ ];`

After carrying out the following two statements, `sales` will have been created as a one-dimensional array that can hold 20 double values. `typedef salesArray double[20]; salesArray sales;`

If the `scores` array is defined like this: `int scores[] = {4, 7, 4, 8, 9};`, what will the following statement display: `cout << scores[4];`

Any of the following statements can be used to initialize the integer variable `num` to 7: `int num = 7; int num(7); int num{7};`

On each iteration of the following range-based for loop `for (int element : myArray) cout << element << endl;`, the variable `element` holds

The following two arrays `string deptName[3] = {"Manufacturing", "Sales", "Business Office"};` and `double deptBudget[3] = {200000.0, 60000.0, 50000.0};` are an example of _____ arrays.

If `employee` is an array of objects with a public member function named `setHoursWorked`, which of the following statements correctly calls that function for the employee object in array element 5?