Question 1

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.

Accepted Answer

The statement int list[10][8]; declares a two-dimensional array with 10 rows and 8 columns, meaning it has a total of 80 components (10 x 8 = 80). Therefore, option A is the correct choice.

Question 2

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] << " ";

Accepted Answer

The loop in option C runs for j values from 0 to 50 (inclusive), which means it tries to access gamma[50] which is out of bounds. The other loops run for j values that are within the bounds of gamma.

Question 3

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);

Accepted Answer

Both A and B are technically correct, but it is recommended to include the commas between the values for readability purposes. C uses square brackets instead of curly braces, which is incorrect syntax. D uses parentheses instead of curly braces or square brackets, which is also incorrect syntax.

Question 4

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];

Accepted Answer

The answer of Given the following declaration: int j;
Int sum;
Double...

Question 5

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

Accepted Answer

The answer of The word ____________________ is used before the...

Question 6

In C++, the null character is represented as ____.
A) '\0'
B) "\0"
C) '0'
D) "0"

Accepted Answer

In C++, the null character is represented as '\0', which is a single character enclosed in single quotes.

Question 7

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];

Accepted Answer

The answer of Given the following declaration: int j;
Int sum;
Double...

Question 8

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

Accepted Answer

A collection of a fixed number of elements arranged in n dimensions (n>=1) is called an n-dimensional array. Matrices and vectors are specific types of n-dimensional arrays. Parallel arrays refer to multiple separate arrays that contain corresponding data elements.

Question 9

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

Accepted Answer

In row order form, data is stored row by row, so the first row is stored first.

Question 10

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");

Accepted Answer

Option A is incorrect because we cannot assign a string directly to a character array.
Option B is incorrect because the size of the array is 15, so accessing str[15] will be outside the bounds of the array.
Option D is incorrect because strcpy requires two arguments: the destination and the source. Here, the destination is missing.
Option C is the correct choice because it uses strcpy to copy the string "Blue Sky" into the character array str.

Question 11

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

Accepted Answer

Each element in the matrix is set to the value of j+k, where j is the row index and k is the column index. So the matrix will look like:
0 1
1 2
2 3

Question 12

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 = '
'
D) discard = '\0'

Accepted Answer

After the statement cin.get(charArray, 51), the input "Hello There!" is stored in charArray and the newline character '
' is left in the input stream. When cin.get(discard) is executed, the newline character is read into discard, giving the value of '
'.

Question 13

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

Accepted Answer

The answer of A data type is called ____________________ if...

Question 14

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

Accepted Answer

The answer of In a(n) ____________________ data type, each data...

Question 15

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';

Accepted Answer

Option C is correct because "William" consists of 7 characters, and in C programming, a character array requires an extra space for the null terminator '\0' to indicate the end of the string, making the total size needed 8.

Question 16

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

Accepted Answer

The answer of Complete the following statement so that it...

Question 17

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

Accepted Answer

The answer of The ____________________ of an array is the...

Question 18

Consider the following statement: double alpha[10][5];. The number of components of alpha is ____.
A) 15
B) 50
C) 100
D) 150

Accepted Answer

The array alpha has 10 rows and 5 columns, so it has a total of 10*5 = 50 components.

Question 19

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}};

Accepted Answer

In option D, the array is correctly declared and initialized with four rows and three columns using curly braces to separate each row and comma separated values for each column.

Question 20

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.

Accepted Answer

In C++, the index of an array starts from 0. Therefore, the first row of alpha would be 0 and the last row would be 24. Similarly, the first column of alpha would be 0 and the last column would be 9. Thus, option A is true.

Quiz 8: Arrays and Strings

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

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?

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

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?

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

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

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

In row order form, the ____.

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

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;

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

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

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

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

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

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

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

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