Deck 8: Arrays and Strings

Question 1

The array index can be any integer less than the array size.

Answer 1

False

Question 2

In a two-dimensional array, the elements are arranged in a table form.

Answer 2

True

Question 3

Suppose that list is an array of 10 components of type int. Which of the following codes correctly outputs all the elements of list?

A) for (int j = 1; j < 10; j++)
Cout << list[j] << " ";
Cout << endl;
B) for (int j = 0; j <= 9; j++)
Cout << list[j] << " ";
Cout << endl;
C) for (int j = 1; j < 11; j++)
Cout << list[j] << " ";
Cout << endl;
D) for (int j = 1; j <= 10; j++)
Cout << list[j] << " ";
Cout << endl;

Answer 3

B

Question 4

Suppose list is a one dimensional array of size 25, wherein each component is of type int. Further, suppose that sum is an int variable. The following for loop correctly finds the sum of the elements of list.
sum = 0;
for (int i = 0; i < 25; i++)
sum = sum + list;

Question 5

All components of an array are of the same data type.

Question 6

The one place where C++ allows aggregate operations on arrays is the input and output of C-strings.

Question 7

What is the output of the following C++ code? int list[5] = {0, 5, 10, 15, 20};
Int j;
For (j = 1; j <= 5; j++)
Cout << list[j] << " ";
Cout << endl;

A) 0 5 10 15 20
B) 5 10 15 20 0
C) 5 10 15 20 20
D) Code results in index out-of-bounds

Question 8

Given the declaration int list[20]; the statement list[12] = list[5] + list[7]; updates the content of the twelfth component of the array list.

Question 9

Assume you have the following declaration char nameList[100];. Which of the following ranges is valid for the index of the array nameList?

A) 0 through 99
B) 0 through 100
C) 1 through 100
D) 1 through 101

Question 10

Assume you have the following declaration double salesData[1000];. Which of the following ranges is valid for the index of the array salesData?

A) 0 through 999
B) 0 through 1000
C) 1 through 1001
D) 1 through 1000

Question 11

If an array index goes out of bounds, the program always terminates in an error.

Question 12

Suppose that sales is an array of 50 components of type double. Which of the following correctly initializes the array sales?

A) for (int 1 = 1; j <= 49; j++)
Sales[j] = 0;
B) for (int j = 1; j <= 50; j++)
Sales[j] = 0;
C) for (int j = 0; j <= 49; j++)
Sales[j] = 0.0;
D) for (int j = 0; j <= 50; j++)
Sales[j] = 0.0;

Question 13

What is the value of alpha[2] after the following code executes? int alpha[5];
Int j;
For (j = 0; j < 5; j++)
Alpha[j] = 2 * j + 1;

A) 1
B) 4
C) 5
D) 6

Question 14

Arrays can be passed as parameters to a function by value, but it is faster to pass them by reference.

Question 15

Assume you have the following declaration int beta[50];. Which of the following is a valid element of beta?

A) beta['2']
B) beta['50']
C) beta[0]
D) beta[50]

Question 16

What is the output of the following C++ code? int list[5] = {0, 5, 10, 15, 20};
Int j;
For (j = 0; j < 5; j++)
Cout << list[j] << " ";
Cout << endl;

A) 0 1 2 3 4
B) 0 5 10 15
C) 0 5 10 15 20
D) 5 10 15 20

Question 17

What is the output of the following C++ code? int alpha[5] = {2, 4, 6, 8, 10};
Int j;
For (j = 4; j >= 0; j--)
Cout << alpha[j] << " ";
Cout << endl;

A) 2 4 6 8 10
B) 4 3 2 1 0
C) 8 6 4 2 0
D) 10 8 6 4 2

Question 18

When you pass an array as a parameter, the base address of the actual array is passed to the formal parameter.

Question 19

The statement int list[25]; declares list to be an array of 26 components, since the array index starts at 0.

Question 20

Which of the following statements declares alpha to be an array of 25 components of the type int?

A) int alpha[25];
B) int array alpha[25];
C) int alpha[2][5];
D) int array alpha[25][25];

Question 21

Consider the statement int list[10][8];. Which of the following about list is true?

A) list has 10 rows and 8 columns.
B) list has 8 rows and 10 columns.
C) list has a total of 18 components.
D) list has a total of 108 components.

Question 22

Suppose that gamma is an array of 50 components of type int and j is an int variable. Which of the following for loops sets the index of gamma out of bounds?

A) for (j = 0; j <= 49; j++)
Cout << gamma[j] << " ";
B) for (j = 1; j < 50; j++)
Cout << gamma[j] << " ";
C) for (j = 0; j <= 50; j++)
Cout << gamma[j] << " ";
D) for (j = 0; j <= 48; j++)
Cout << gamma[j] << " ";

Question 23

Consider the following declaration: int alpha[5] = {3, 5, 7, 9, 11};. Which of the following is equivalent to this statement?

A) int alpha[] = {3, 5, 7, 9, 11};
B) int alpha[] = {3 5 7 9 11};
C) int alpha[5] = [3, 5, 7, 9, 11];
D) int alpha[] = (3, 5, 7, 9, 11);

Question 24

Given the following declaration: int j;
Int sum;
Double sale[10][7];
Which of the following correctly finds the sum of the elements of the fifth row of sale?

A) sum = 0;
For(j = 0; j < 7; j++)
Sum = sum + sale[5][j];
B) sum = 0;
For(j = 0; j < 7; j++)
Sum = sum + sale[4][j];
C) sum = 0;
For(j = 0; j < 10; j++)
Sum = sum + sale[5][j];
D) sum = 0;
For(j = 0; j < 10; j++)
Sum = sum + sale[4][j];

Question 25

The word ____________________ is used before the array declaration in a function heading to prevent the function from modifying the array.

Question 26

In C++, the null character is represented as ____.

A) '\0'
B) "\0"
C) '0'
D) "0"

Question 27

Given the following declaration: int j;
Int sum;
Double sale[10][7];
Which of the following correctly finds the sum of the elements of the fourth column of sale?

A) sum = 0;
For(j = 0; j < 7; j++)
Sum = sum + sale[j][3];
B) sum = 0;
For(j = 0; j < 7; j++)
Sum = sum + sale[j][4];
C) sum = 0;
For(j = 0; j < 10; j++)
Sum = sum + sale[j][4];
D) sum = 0;
For(j = 0; j < 10; j++)
Sum = sum + sale[j][3];

Question 28

A collection of a fixed number of elements (called components) arranged in n dimensions (n>=1) is called a(n) ____.

A) matrix
B) vector
C) n-dimensional array
D) parallel array

Question 29

In row order form, the ____.

A) first row is stored first
B) first row is stored last
C) first column is stored first
D) first column is stored last

Question 30

Consider the following declaration: char str[15];. Which of the following statements stores "Blue Sky" into str?

A) str = "Blue Sky";
B) str[15] = "Blue Sky";
C) strcpy(str, "Blue Sky");
D) strcpy("Blue Sky");

Question 31

After the following statements execute, what are the contents of matrix? int matrix[3][2];
Int j, k;
For (j = 0; j < 3; j++)
For (k = 0; k < 2; k++)
Matrix[j][k] = j + k;

A) 0 0
1 1
2 2
B) 0 1
2 3
4 5
C) 0 1
1 2
2 3
D) 1 1
2 2
3 3

Question 32

Consider the following declaration: char charArray[51];
Char discard;
Assume that the input is:
Hello There!
How are you?
What is the value of discard after the following statements execute?
Cin)get(charArray, 51);
Cin)get(discard);

A) discard = ' ' (Space)
B) discard = '!'
C) discard = '\n'
D) discard = '\0'

Question 33

A data type is called ____________________ if variables of that type can store only one value at a time.

Question 34

In a(n) ____________________ data type, each data item is a collection of other data items.

Question 35

Which of the following correctly declares name to be a character array and stores "William" in it?

A) char name[6] = "William";
B) char name[7] = "William";
C) char name[8] = "William";
D) char name[8] = 'William';

Question 36

Complete the following statement so that it outputs the array sales.
double sales[10];
int index;
for (index = 0; index < 10; index++)
cout << ____________________ << " ";

Question 37

The ____________________ of an array is the address (that is, the memory location) of the first array component.

Question 38

Consider the following statement: double alpha[10][5];. The number of components of alpha is ____.

A) 15
B) 50
C) 100
D) 150

Question 39

Which of the following correctly declares and initializes alpha to be an array of four rows and three columns with the component type int?

A) int alpha[4][3] = {{0,1,2} {1,2,3} {2,3,4} {3,4,5}};
B) int alpha[4][3] = {0,1,2; 1,2,3; 2,3,4; 3,4,5};
C) int alpha[4][3] = {0,1,2: 1,2,3: 2,3,4: 3,4,5};
D) int alpha[4][3] = {{0,1,2}, {1,2,3}, {2,3,4}, {3,4,5}};

Question 40

Consider the following statement: int alpha[25][10];. Which of the following statements about alpha is true?

A) Rows of alpha are numbered 0...24 and columns are numbered 0...9.
B) Rows of alpha are numbered 0...24 and columns are numbered 1...10.
C) Rows of alpha are numbered 1...24 and columns are numbered 0...9.
D) Rows of alpha are numbered 1...25 and columns are numbered 1...10.

Question 41

For a list of length n, the ____________________ sort makes exactly (n(n - 1))/2 key comparisons and 3(n-1) item assignments.

Question 42

The ____________________ sort algorithm finds the location of the smallest element in the unsorted portion of the list and moves it to the top of the unsorted portion of the list.

Question 43

The function ____________________ returns the length of the string s, excluding the null character.

Question 44

The header file string contains the function ____________________,which converts a value of type string to a null-terminated character array.

Question 45

The following statement creates alpha to be a two-dimensional array with ____________________ rows.
int alpha[10][25];

Question 46

The declaration char str[] = "Hello there"; declares str to be a string of ____________________ characters.

Question 47

Two (or more) arrays are called ____________________ if their corresponding components hold related information.

Question 48

The following statements store the value ____________________ into len.
int len;
len = strlen("Sunny California");

Question 49

The statement strlen("Marylin Stewart"); returns ____________________.

Question 50

In the following declaration, the array gamma has ____________________ components.
int gamma[5][6][10];