Chapter 5 Looping REVIEW QUESTIONS
1.
The structure that allows you to write one set of instructions that operates on multiple, separate sets of data
is the _____________________ structure.
a.
b.
c.
d.
2.
The loop that frequently appears in a program's mainline logic ______________________ .
a.
b.
c.
d.
3.
digesting
resetting
decrementing
incrementing
Which of the following is a definite loop?
a.
b.
c.
d,
8.
the number of times an event has occurred
the number of machine cycles required by a segment of a program
the number of loop structures within a program
the number of times software has been revised.
Adding 1 to a variable is also called ________________________________ it.
a.
b.
c.
d.
7.
loop body
loop controls
sequences
sentinels
A counter keeps track of __________________________ .
a.
b.
c.
d.
6.
Initialize a loop control variable before the loop starts.
Set the loop control value equal to a sentinel during each iteration.
Compare the loop control value to a sentinel each iteration.
Alter the loop control variable during each iteration.
The statements executed within a loop are known collectively as the__________________ .
a.
b.
c.
d.
5.
always depends on whether a variable equals 0
works correctly based on the same logic as other loops
is an unstructured loop
is an example of an infinite loop
Which of the following is not a step that must occur with every correctly working loop?
a.
b.
c.
d.
4.
sequence
selection
loop
case
a loop that executes as long as a user continues to enter valid data
a loop that executes 1000 times
both of the above
none of the above
Which of the following is an indefinite loop?
a.
b.
c.
d.
a loop that executes exactly 10 times
a loop that follows a prompt asking a user how many repetitions to make and uses that value to control the loop
both of the above
none of the above
9.
When you decrement a variable, you _________________________ .
a.
b.
c.
d.
10.
When two loops are nested, the loop that is contained by the other is the __________________ loop.
a.
b.
c.
d.
11.
0
1
10
100
Typically, the value added to an accumulator variable is __________________ .
a.
b.
c.
d.
16.
accumulator
final
summary
detailless
Typically, the value added to a counter variable is _______________________ .
a.
b.
c.
d.
15.
for every loop they write
when a loop will not repeat
when they do not know the exact number of times a loop will repeat
when they know the exact number of times a loop will repeat
A report that lists only totals, with no details about individual records, is a(n) ____________ report.
a.
b.
c.
d.
14.
they typically share a loop control variable
one must end before the other begins
both must be the same type - definite or indefinite
none of the above
Most programmers use a for loop ____________________________ .
a.
b.
c.
d.
13.
captive
unstructured
inner
outer
When loops are nested, _____________________ .
a.
b.
c.
d.
12.
set it to 0
reduce it by one-tenth
subtract 1 from it
remove it from a program
0
1
the same for each iteration
different in each iteration
After an accumulator or counter variable is displayed at the end of a program, it is best to ______________ .
a.
b.
c.
d.
delete the variable from the program
reset the variable to 0
subtract 1 from the variable
none of the above
17.
When you _______________ , you make sure data items are the correct type and fall within the correct range.
a.
b.
c.
d.
18.
Overriding a user's entered value by setting it to a predetermined value is known as _________________ .
a.
b.
c.
d.
19.
forcing
accumulating
validating
pushing
To ensure that a user’s entry is the correct data type, frequently you .
a.
b.
c.
d.
20.
validate data
employ offensive programming
use object orientation
count loop iterations
prompt the user, asking if the user is sure the type is correct
use a method built into the programming language
include a statement at the beginning of the program that lists the data types allowed
all of the above
Variables might hold incorrect values even when they are _______________________ .
a.
b.
c.
d.
the correct data type
within a required range
coded by the programmer rather than input by a user
all of the above