Deck 8: Arrays and Strings

Question 1

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];

Answer 1

A

Question 2

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]

Answer 2

C

Question 3

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

Answer 3

True

Question 4

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 5

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 6

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

Question 7

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

Question 8

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 9

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

Question 10

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 11

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

Question 12

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 13

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 14

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

Question 15

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 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

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 18

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;

Question 19

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

Question 20

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

Question 21

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 22

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

Question 23

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 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 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 25

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 26

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 27

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

Question 28

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

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

Question 29

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

Question 30

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

Question 31

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 32

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

Question 33

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 34

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 35

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 36

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

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

Question 37

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 38

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 39

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 40

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 41

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

Question 42

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

Question 43

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

Question 44

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

Question 45

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

Question 46

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

Question 47

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

Question 48

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

Question 49

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 50

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