Chapter Eight
Test Bank for Prelude to Programming Chapter 4
MULTIPLE CHOICE
1. Which of the following is a true statement?
|a. |(15 * 2 30) |
|b. |(15 * 2 30) |
|c. |(15 * 2 > 30) AND (15 – 2 < 30) |
|d. |(15 * 2 < 30) OR (15 – 2 > 30) |
ANS: B
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2. Given that the variables MyName and YourName are defined as follows, which expression is true?
MyName = “Elizabeth” and YourName = “Mike”
|a. |MyName > YourName |
|b. |MyName = YourName |
|c. |YourName = MyName |
ANS: D
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3. What will be displayed if code corresponding to the following pseudcode is executed?
Set Number = 4
Repeat
Write 2 * Number
Set Number = Number + 2
Until Number = 8
|a. | 8 |b. | 4 |c. | 8 |d. | 12 |
| |12 | |8 | |12 | |16 |
| |16 | |12 | | | | |
ANS: C
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4. A counter must be:
|a. |a positive number |
|b. |a real number |
|c. |an integer |
|d. |a variable named Count |
ANS: C
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5. Given: Count = 23, what is the value of Count after the following statement is executed: Count = Count + 2
|a. |23 |
|b. |25 |
|c. |48 |
|d. |24 |
ANS: B
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6. Which of the following is not a type of loop?
|a. |While |
|b. |For |
|c. |Repeat |
|d. |all of the above are types of loops |
ANS: D
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7. What will be displayed after code corresponding to the following pseudocode is run?
Set Count = 10
While Count > 0
Write Count
Set Count = Count – 2
End While
|a. | 10 |b. | 10 |c. | 8 |d. | 8 |
| |8 | |8 | |6 | |6 |
| |6 | |6 | |4 | |4 |
| |4 | |4 | |2 | |2 |
| |2 | |2 | | | |0 |
| | | |0 | | | | |
ANS: A
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8. What will be displayed after code corresponding to the following pseudocode is run?
Set Count = 2
While Count < 10
Set Count = Count + 2
Write Count
End While
|a. | 2 |b. | 2 |c. | 4 |d. | 4 |
| |4 | |4 | |6 | |6 |
| |6 | |6 | |8 | |8 |
| |8 | |8 | |10 | | |
| |10 | | | | | | |
ANS: C
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9. If Number = 7, what will be displayed after code corresponding to the following pseudocode is run?
For Count = 5 Step 1 To Number
Write Count, Count * 2
End For
|a. | 5 10 |b. | 5 10 |c. | 5 10 |d. | 5 7 |
| |6 12 | |6 12 | |7 14 | |10 14 |
| |7 14 | | | | | | |
ANS: A
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10. What will be displayed after code corresponding to the following pseudocode is run?
Write “Loops are fun!”
For Count = 8 Step -2 to 4
Write “Hooray!”
End For
|a. |Loops are fun! |b. |Loops are fun! |
| |Hooray! | |Hooray! |
| |Hooray! | |Hooray! |
| |Hooray! | | |
|c. |Loops are fun! |d. |nothing will display |
ANS: A
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11. If Apples = 6, what will be displayed after code corresponding to the following pseudocode is run?
While Apples < 0
Write “You can’t eat “, Apples, “at one time!”
End While
Write “Goodbye, apple lover.”
|a. |You can’t eat 6 apples at one time! |
| |Goodbye, apple lover. |
|b. |nothing will display |
|c. |You can’t eat apples at one time! |
|d. |Goodbye, apple lover. |
ANS: D
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12. If MyNumber = 6.8, what is the value of Int(MyNumber * 4^2)?
|a. |108.8 |
|b. |108 |
|c. |109 |
|d. |this is an illegal operation |
ANS: B
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13. What is the output of the code corresponding to the following pseudocode?
For I = 2 Step 1 To 3
For J = 1 Step 1 To 3
Write I, “and “ J
End For(J)
End For(I)
|a. | 2 and 1 |b. | 2 and 1 |c. | 1 and 1 |d. | I and J |
| |3 and 1 | |2 and 2 | |2 and 2 | |I and J |
| | | |2 and 3 | |3 and 3 | |I and J |
| | | |3 and 1 | | | | |
| | | |3 and 2 | | | | |
| | | |3 and 3 | | | | |
ANS: B
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14. What statements are in the body of the following loop?
Set Number = 12
For I = 1 Step 1 To 15
Write “Enter a number: “
Input Number
Write “That’s a good number.”
End For
Write “Bye bye.”
|a. |Set Number = 12 |
| |Write “Bye bye.” |
|b. |Write “Enter a number: “ |
| |Write “That’s a good number.” |
|c. |Write “Enter a number: “ |
| |Write “That’s a good number.” |
| |Write “Bye bye.” |
|d. |Write “Enter a number: “ |
| |Input Number |
| |Write “That’s a good number.” |
ANS: D
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15. If N = 5, what is displayed when the following pseudocode is coded and run?
Set A = 2
For B = 1 Step 1 To N
Set A = A + 2 * B
End For
Write A
|a. | 22 |b. |16 |c. |32 |d. |18 |
ANS: C
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TRUE/FALSE
1. True/False: If Number = 7, then the following statement is true:
(Number * Number) = YourName)
4.
ANS: T
4. True/False: If one For Loop is nested within another, then the limit value for the two loops must be different.
ANS: F
5. True/False: Two non-overlapping loops can be nested within a third loop.
ANS: T
6. True/False: If the following statement is the first line of a For loop, on the first pass through the loop, X will have the value of 2.
For X = 1 Step 2 to 10
ANS: F
7. True/False: If the following statement is the first line of a For loop, N is the limit value.
For X = 1 Step 3 to N
ANS: T
8. True/False: The body of a post-test loop is always executed at least once.
ANS: T
9. True/False: The body of a pre-test loop is always executed at least once.
ANS: F
10. True/False: In a pre-test loop the test condition is at the bottom, while it is at the top in a post-test loop.
ANS: F
11. True/False: In the following statement, X is the initial value:
For X = N Step 2 to Y
ANS: F
12. True/False: A step value in a loop can be either a positive or a negative number.
ANS: T
13. True/False: Is the following statement true or false? Int(6.89) = 6.
ANS: T
14. True/False: Is the following statement true or false? (50 12).
ANS: F
15. True/False: There are six relational operators.
ANS: T
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SHORT ANSWER
1. If the increment of a For loop is negative, then the body of the loop will not be executed if the initial value is __________ than the limit value.
ANS: less
2. To __________ data means to ensure that the data are in the proper range.
ANS: validate
3. If Number1 = 19.86 and Number2 = 2.04, then:
a. Int(Number1) + Int(Number2) = __________.
ANS: 21
4. If Number1 = 19.86 and Number2 = 2.04 then:
a. Int(Number1 + Number2) = __________. .
ANS: 21
5. If a loop contains a test condition that can never be met, it is called a(n) __________ loop.
ANS: infinite
6. For readability, most programs __________ the body of a loop.
ANS: indent
7. A loop that is executed a fixed number of times, where that number is known before entering the loop for the first time, is known as a(n) __________ __________ loop.
ANS: counter controlled
8. A variable that keeps track of the number of passes through a loop is known as a(n) __________.
ANS: counter
9. The number of passes through a loop is known as the number of loop __________.
ANS: iterations
10. When a loop counter is set to its first value, it is said to be __________.
ANS: initialized
11. When the step value in a loop is positive, the counter is said to be __________.
ANS: incremented
12. One way to force a loop to end is to have the user enter a special item, called a(n) ___________ __________ which acts as a signal that input is complete.
ANS: sentinel value
13. A sentinel value is also known as a(n) __________ marker.
ANS: end-of-data
14. The type of loop that uses two input values (one before the loop is entered and one within the loop) to validate data is a(n) __________-test loop.
ANS: pre
15. One way to break out of a loop early, when, for example, a user has entered an incorrect value or entered a specified response, is to use a(n) __________ structure within the loop.
ANS: If-Then-Else
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