csci exam 3

Question 1

An array is an example of a structured data type (t/f)

Answer 1

true

Question 2

All components of an array are of the same type (t/f)

Answer 2

true

Question 3

If array index goes out of bounds, the program always terminates in an error. (t/f)

Answer 3

false

Question 4

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

Answer 4

false

Question 5

The word const is used before the array declaration in a function heading to prevent the function from modifying the array. (t/f)

Answer 5

true

Question 6

The base address of an array is the memory location of the first array component. (t/f)

Answer 6

true

Question 7

A function cannot return a value of the type array. (t/f)

Answer 7

true

Question 8

Two arrays are parallel id they hold the same type of data. (t/f)

Answer 8

false

Question 9

when a two-dimensional array is declared as a parameter, the C++ compiler ignores the sizes of both dimensions (t/f)

Answer 9

false

Question 10

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

Answer 10

int alpha[25];

Question 11

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

Answer 11

0 trough 99

Question 12

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

Answer 12

for (int j = 0; j < =9; j++)
cout &laquo_space;List[j] «” “;
cout &laquo_space;endl;

Question 13

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 &laquo_space;list[j] &laquo_space;” “;
cout &laquo_space;endl;

Answer 13

0 5 10 15 20

Question 14

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 &laquo_space;alpha[j] &laquo_space;” “;
cout &laquo_space;endl;

Answer 14

10 8 6 4 2

Question 15

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?

Answer 15

for (j = 0; j <= 50; j++)
cout &laquo_space;gamma[j] &laquo_space;” “;

Question 16

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

Answer 16

int alpha[] = {3, 5, 7, 9, 11};

Question 17

Consider the following declaration int alpha[3];. Which of the following statements correctly inputs values into alpha?

Answer 17

cin&raquo_space; alpha[0]
» alpha[1]
» alpha[2];

Question 18

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

Answer 18

50

Question 19

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

Answer 19

list has 10 rows and 8 columns

Question 20

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;

Answer 20

0 1
1 2
2 3

Question 21

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?

Answer 21

sum = 0;
for(j = 0; j < 7; j++)
sum = sum + sale[4][j];

Question 22

Given the following declaration:

int l;
int sum;
double sale[10][7];

Which of the following correctly finds the sum of the elements of the fourth column of sale?

Answer 22

sum = 0;
for(j = 0; j < 10; j++)
sum = sum + sale[j][3];

Question 23

A struct is a homogeneous data structure with all components of the same type. (t/f)

Answer 23

false

Question 24

Both arrays and structs are examples of structured data types. (t/f)

Answer 24

True

Question 25

Memory is allocated when you define a struct. (t/f)

Answer 25

false