Deck 4: Dowhile Control Structurecounter-Controlled Loops

Question 1

To create a properly formed DOWHILE loop you must

A)place the loop test before any other step in the loop
B)place the loop steps in the NO path of the loop test
C)indicate that the loop will exit in the YES path of the loop test
D)all of the above

Answer 1

A

Question 2

A counter-controlled loop is more flexible than a loop controlled by a header record value.

Answer 2

False

Question 3

A program that can be viewed as a single statement is called a

A)structured program
B)proper program
C)header record logic program
D)SIMPLE SEQUENCE program

Answer 3

B

Question 4

If the value input for START is 8,how many times will the instructions within the loop below be executed?
Read START
COUNT $=$ START
DOWHILE COUNT $\leq$ START
COUNT $=$ COUNT - 1
Write COUNT
ENDDO

A)0
B)1
C)8
D)infinite

Question 5

If the value input for START is 8,how many times will the instructions within the loop below be executed?
Read START
COUNT $=$ START
DOWHILE COUNT $>$ START
COUNT $=$ COUNT - 1
Write COUNT
ENDDO

A)0
B)1
C)8
D)infinite

Question 6

Which program flowcharting symbol can be used to represent an initialization step in a program flowchart?

A)decision
B)connector
C)terminal interrupt
D)preparation

Question 7

The test for the No-Data condition is implemented in program design with a(n)

A)IFTHENELSE pattern
B)DOWHILE loop
C)READ statement
D)preparation step

Question 8

What is the value of ANSWER after the instructions corresponding to the following pseudocode are executed?
$$\begin{array} { l } \text { COUNT } = 5 \\\text { SUM } = 100 \\\text { DOWHILE COUNT } > 5 \\\quad \text { SUM } = \text { SUM } + 5 \\\quad \text { COUNT } = \text { COUNT } + 1 \\\text { ENDDO } \\\text { ANSWER } = \text { SUM }\end{array}$$

A)100
B)125
C)5
D)25

Question 9

What is the value of ANSWER after the instructions corresponding to the following pseudocode are executed?
$\mathrm { COUNT } = 2$
$\mathrm { SUM } = 100$
DOWHILE COUNT $< 5$
$\mathrm { SUM } = \mathrm { SUM } + 5$
$\mathrm { COUNT } = \mathrm { COUNT } + 1$
ENDDO
ANSWER $=$ SUM

A)110
B)115
C)120
D)125

Question 10

A partial sum cannot have the same value as the corresponding total sum.

Question 11

A variable that is used to hold the sum of a group of values is called a(n)

A)counter
B)accumulator
C)header record
D)loop control

Question 12

How many values will be output when the instructions corresponding to the following pseudocode are executed?
$\mathrm { ACCUM } = 1$
COUNT $= 0$
DOWHILE COUNT $< 4$
$A C C U M = A C C U M + A C C U M$
COUNT $=$ COUNT + 1
Write ACCUM
$\mathrm { ENDDO }$
Write ACCUM

A)4
B)5
C)8
D)16

Question 13

What type of loop is executed a predetermined number of times?

A)infinite
B)counter-controlled
C)header record
D)leading decision

Question 14

A sequence of processing steps that must be repeated is called a

A)decision
B)counter
C)loop
D)proper program

Question 15

What is the value of ANSWER after the instructions corresponding to the following pseudocode are executed?
$$\begin{array} { l } \text { COUNT } = 1 \\\text { SUM } = 3 \\\text { DOWHILE COUNT } \geq 0 \\\quad \text { SUM } = \text { SUM } + \text { COUNT } \\\quad \text { COUNT } = \text { COUNT } - 1 \\\text { ENDDO } \\\text { ANSWER } = \text { SUM }\end{array}$$

A)3
B)4
C)5
D)6

Question 16

A DOWHILE loop is a leading-decision program loop.

Question 17

Any solution algorithm can be expressed using one or more of the three basic control structures.

Question 18

An accumulator always adds or accumulates by a constant amount.

Question 19

If the value input for START is 8,how many times will the instructions within the loop below be executed?
Read START
COUNT $=$ START
DOWHILE COUNT $\geq$ START COUNT $=$ COUNT - 1 Write COUNT
ENDDO

A)0
B)1
C)8
D)infinite

Question 20

What is the value of the variable ACCUM after the instructions corresponding to the following pseudocode are executed?
$\mathrm { ACCUM } = 1$
COUNT $= 0$
DOWHILE $C O U N T \leq 4$
$\mathrm { ACCUM } = \mathrm { ACCUM } + \mathrm { ACCUM }$
$\mathrm { COUNT } = \mathrm { COUNT } + 1$
ENDDO

A)8
B)16
C)32
D)64

Question 21

The steps after the loop are always placed on the line after ENDDO and are indented a few positions for clarity.

Question 22

In a counter-controlled loop,the value of the counter must be changed by some statement within the loop..

Question 23

To create a properly formed DOWHILE loop you must place the loop steps in the YES path of the loop.

Question 24

A preparation symbol should be used in a program flowchart to initialize a counter prior to entering a loop.

Question 25

A counter used to control a loop can be either incremented or decremented.

Question 26

A connector symbol must be placed at the exit point of a DOWHILE loop just as it is placed at the exit point of an IFTHENELSE control structure.

Question 27

A READ statement used to input a header record must be placed within the loop that a value in the header record is controlling.

Question 28

To create a properly formed DOWHILE loop you must place the loop test after all other steps within the loop.

Question 29

The loop steps are placed between the DOWHILE statement and the ENDDO statement and are not indented.

Question 30

When header record logic is used in loop processing,the loop is controlled by a counter.