Test Bank for Prelude to Programming Chapter 4

Extended Prelude to Programming

Test Bank Chapter 4

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

2. Given that the variables MyName and YourName are defined as follows, which expression is true?

MyName = “Elizabeth” and YourName = “Mike” YourName YourName = MyName

a. MyName > b. MyName = c. YourName d. YourName ANS: D

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 12 16 ANS: C

b.

4 8 12

c.

8 12

d.

12 16

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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Extended Prelude to Programming

Test Bank Chapter 4

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

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

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 8 6 4 2

b.

10 8 6 4 2 0

c.

8 6 4 2

d.

8 6 4 2 0

ANS: A

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 4 6 8 10 ANS: C

b.

2 4 6 8

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c.

4 6 8 10

d.

4 6 8

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Extended Prelude to Programming

Test Bank Chapter 4

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 6 12 7 14 ANS: A

b.

5 10 6 12

c.

5 10 7 14

d.

57 10 14

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!

Hooray! Hooray! Hooray! c. Loops are fun! ANS: A

b. Loops are fun!

Hooray! Hooray!

d. nothing will display

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

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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Extended Prelude to Programming

Test Bank Chapter 4

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 3 and 1

b.

2 2 2 3 3 3

and and and and and and

1 2 3 1 2 3

c.

1 and 1 2 and 2 3 and 3

d.

I and J I and J I and J

ANS: B

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 Write d. Write Input Write

“That’s a good number.” “Bye bye.” “Enter a number: “ Number “That’s a good number.”

ANS: D

15. If N = 5, what is displayed when the following pseudocode is coded and run?

a. 22 ANS: C

Set A = 2 For B = 1 Step 1 To N Set A = A + 2 * B End For Write A b. 16 c. 32

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d. 18

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Extended Prelude to Programming

Test Bank Chapter 4

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.

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Extended Prelude to Programming

Test Bank Chapter 4

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

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.

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Extended Prelude to Programming

Test Bank Chapter 4

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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