Quiz6-Functions

Question 1

Library functions are built into a programming language and can be called whenever they are needed.(T/F)

Answer 1

True

Question 2

The input column in an IPO chart describes the process that the function performs on input data.(T/F)

Answer 2

False

Question 3

Many programming languages let you assign an integer value to a real variable without causing an error(T/F)

Answer 3

True

Question 4

Random numbers are useful in simulation programs where the computer must randomly decide how an object will behave(T/F)

Answer 4

True

Question 5

The function body follows the function header in a function definition.(T/F)

Answer 5

True

Question 6

The TO INTEGER function accepts a real number as its argument and preserves any fractional part in the returned number.(T/F)

Answer 6

False

Question 7

When a function finishes executing, it returns a value back to the part of the program that called it.(T/F)

Answer 7

True

Question 8

If the string variable name has the value “Anne Marie”, then the following statement would return 9: (T/F)

Set number = length(name)

Answer 8

False

Question 9

If the string variable name has the value “Anne.Smith”, then the following statement would return annesmith. (T/F)

Set newName = toLower(name)

Answer 9

False

Question 10

If the integer variable number has the value 5, then the following statement would return 25 to result.(T/F)

Set result = sqrt(number)

Answer 10

False: sqrt(5) would not be 25

Question 11

Given an integer variable number, the only possible values for number that could result from the following statement are 1 and 2.

Set number = random(0,2)

Answer 11

False

Question 12

The following pseudocode would display: Hello, friend. (T/F)

Declare String str1=”Hello,”
Declare String str2=” friend”
Set message = append(str1,str2)
Display message

Answer 12

True

Question 13

A function ___________ specifies the return data type, name of the function and the parameter variable(s).

Answer 13

header

Question 14

Which function accepts two strings as arguments and returns TRUE if the second string is contained in the first string or FALSE if not?

Answer 14

contains

Question 15

Which function returns a string that is within another string?

Answer 15

substring

Question 16

Which function joins two strings?

Answer 16

concatenate

Question 17

What is the value of y after the following statement is coded and executed, given that x = 25?

Set y = sqrt(x)

Answer 17

5

Question 18

What is the value of y after the following statement is coded and executed, given that x = 3?

Set y = pow(x, x)

Answer 18

27
bc (3^3)= 33=93=27

Question 19

What is the value of r after the following statement is coded and executed?

Declare Integer i = 12
Declare Real r
Set r = toReal(i)

A) 12

B) 1.2

C) 12.0

Answer 19

C) 12.0

Question 20

What would display if the following pseudocode is coded and executed?

Declare String str1= “car”
Declare String str2=”green”
Set message = append(str1, str2)
Display “You have a “, message

A) You have a greencar

B) You have a green car

C) You have a cargreen

Answer 20

C) You have a cargreen
append means to squish together

Question 21

A _________ is a module that returns a value back to the part of the program that called it.

Answer 21

function

Question 22

A function _________ comprises one or more statements that are executed when the function is called.

Answer 22

Body

Question 23

What is the data type of the value returned by the random function?

A) Real

B) String

C) Boolean

D) Integer

Answer 23

D) Integer

Question 24

The __________ function does the same thing as using the mathematical ^ operator.

Answer 24

“pow”

Question 25

Which of the following errors will occur when attempting to assign a real value to an integer variable?

A) conversion error

B) type mismatch error

C) assignment error

Answer 25

B) type mismatch error

Question 26

What would display if the following pseudocode was coded and executed?

Declare String user = “Joey”
If isInteger(user) Then
Set intUser = stringToInteger(user)
Display intUser
Else
Display “Not a valid number”

Answer 26

Not a Valid Number

Question 27

What would display if the following pseudocode was coded and executed?

Declare String grade = “93”
If isInteger(grade) Then
Set intGrade =stringToInteger(grade)
Display intGrade
Else
Display “Not a valid number”

Answer 27

93

Question 28

What would display if the following pseudocode was coded and executed

Declare String user = “Martha and George”
Declare Integer number
Set number = legnth(user)
Display number

A) 17

B) 15

C) Martha and George

Answer 28

A) 17
counting the characters including the spaces in the “Martha and George” adds to 17

Question 29

What would display if the following pseudocode was coded and executed?

Declare String user = “Martha and George”
Display substring (user, 1,3)

Answer 29

Art
bc count the characters starting from 0
the substring to be displayed are chars 1, 2, and 3. therefore 1=A 2=R 3=T

Question 30

What would be the value of numS if the following pseudocode was coded and run?

Declare String prose = “she sells seashells at the seashore”
Declare Integer counter
Declare Integer numS = 0
For counter = 0 to legnth(prose)
If substring(prose, counter, counter)== “s” Then
Set numS = numS +1
End If
End For

A) 6

B) 8

C) 30

Answer 30

A) 6
bc program is looped to run 6 times (0-legnth of prose which is 5 chars +1 from 0)
Therefore when it counts 6 s even if its not done the prose the program will end.