Ch.6 More about Loops and Decisions Test Questions & Answers

Test Bank for Prelude to Programming Chapter 6

MULTIPLE CHOICE

1. If Number = 4, what possible numbers can result from:

Floor(Random()() * 10) + Number

2. If Number = 4, what possible numbers can result from

Floor(Random() * Number)

3. What is the output of the code corresponding to the following pseudocode?

Declare X As Integer

Declare Y As Integer

For (X = 1; X <=2; X++)

For (Y = 3; Y <= 4; Y++)

Write X * Y

End For(Y)

End For(X)

4. What is the output of the code corresponding to the following pseudocode?

Declare Y As Integer

Declare X As Integer

For (Y = 1; Y <=2; Y++)

For (X = 3; X <= 4; X++)

Write Y * X

End For(X)

End For(Y)

5. What is the output of code corresponding to the following pseudocode?

Declare A As Integer

Declare B As Float

Set A = 2

While <= 3

Set B = 2.5 * A

Write B

Set B = Int(B)

Write B

Set A = A + 1

End While

6. Which of the following loops cannot be nested in a For loop?

7. What is the output of the code corresponding to the pseudocode shown?

Declare G As Integer

Declare H As Integer

Set G = 7

While G <= 8

Set H = 6

While H <= 7

Write G + H

Set H = H + 1

End While(H)

Set G = G + 1

End While(G)

8. What will be displayed after code corresponding to the following pseudocode is run?

Declare A As Integer

Declare B As Integer

Declare C As Integer

Set A = 3

While A <= 6

Set B = (2 * A) – 1

Write B

Set C = A

While C <= (A+1)

Write C

Set C = C + 1

End While(C)

Set A = A + 2

End While(A)

9. Which of the following statements should be used to validate that a number input by the user into a variable named Widgets is an integer value?

10. What does the following program segment do?

Declare Count As Integer

Declare Sum As Integer

Set Sum = 0

For (Count = 1; Count < 50; Count++)

Set Sum = Sum + Count

End For

11. What is wrong with the following pseudocode?

Declare Count As Integer

Declare TheNumber As Integer

Set TheNumber = 12

For (Count = 10; Count>TheNumber; Count--)

Write TheNumber + Count

End For

12. If MyNumber = 7.82, what is the value of Int(MyNumber/2)+ 0.5?

13. What is the output of the code corresponding to the following pseudocode?

Declare M As Integer

Declare P As Integer

Repeat

Set P = 1

While P < 4

Write M + “ and “ + P

Set P = P + 1

End While(P)

Set M = M + 1

Until M = 3

14. Which statement would produce an output of one of the following numbers:

5, 6, 7, 8, 9, 10

15. What is displayed when the following pseudocode is coded and run, given that the input is “Harold”?

Declare Star As Character

Declare A As Integer

Declare Count As Integer

Declare Name As String

Set Star = “*”

Write “Enter your first name: “

Input Name

Set A = Length_Of(Name)

Set Count = 1

Print Name

Print <NL>

While Count <= A

Print Star

Set Count = Count + 1

End While

TRUE/FALSE

1. True/False: It is possible to have both a Select Case statement and an If-Then

structure within a single loop.

1. True/False: If Number = 4, is the following statement true or false:

Int(Number * Number) == Number * Number

1. True/False: If Number = 2.7, is the following statement true or false:

Int(Number * Number) == Number * Number

4. True/False: If one For loop is nested within another, then the limit value for the two loops must be different.

5. True/False: Two non-overlapping loops can be nested within a third loop.

6. True/False: If Number = 3, indicate whether the following statement is true

or false:

Floor(Random() * Number) may be 0, 1, 2, or 3

7. True/False: A For loop may not be nested within a While loop.

1. True/False: Given that Number = 3:

Floor(Random() * Number) + 4 may be 7, 8, 9, 10, 11, 12, or 13

1. True/False: Given that Number = 3:

Floor(Random() * 4) + Number may be 3, 4, 5, or 6

10. True/False: It is not possible to put a loop inside an If-Then statement.

11. True/False: If Number = 2.3, is the following statement true or false:

Number == Int(Number)

12. True/False: A counter in a loop can count up by fives.

13. True/False: Is the following statement true or false?

Ceiling(6.89) = 6

14. True/False: In a program with nested loops, the inner loop is completed before the outer loop.

15. True/False: Is the following statement true or false?

Ceiling(4.22) = 5

SHORT ANSWER

1. Numbers that form an unpredictable sequence in which each number is equally likely to occur are called __________ __________.

2. ____________ __________ are numbers that belong to a sequence, generated by a

mathematical algorithm, in which each number is equally likely to occur.

3. The starting value of an algorithm used to generate a range of numbers is called the _________.

4. The expression Floor(Random()*6) produces the numbers _____ through _____

5. When one loop is contained within another loop, we say these are __________ loops.

6. The statement

If Int(Number) != Number Then...

checks to see if the value of Number is a(n) _________.

7. In a program with nested loops, the outer loop is completed __________ (before/after) the inner loop.

8. If a counter named MyCount in a For loop has the value of 5 on the first pass, 10 on the second pass, 15 on the third pass, and so on, the increment would be written as __________.

9. If a counter named MyCount in a For loop has the initial value of 5 on the first pass and we want it to go through 4 iterations, increasing its value by 5 on each pass, the test condition would be written as __________.

10. The function that returns the number of characters in a string is the __________ function.