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Chapter 2: Applications and Data
TRUE/FALSE
1. Computers deal with two basic types of data -
text and string.
ANS: F PTS: 1 REF: 36
2. A literal numeric constant does not change.
ANS: T PTS: 1 REF: 36
3. An item’s data type defines what operations
can be performed on the item.
ANS: T PTS: 1 REF: 37
4. A named constant can be assigned a value
multiple times.
ANS: F PTS: 1 REF: 39
5. The assignment operator is said to have
right-to-left associativity.
ANS: T PTS: 1 REF: 41
6. A noun would be a good choice for a variable
or constant identifier.
ANS: T PTS: 1 REF: 45
7. An adjective would be a good choice of
identifier for a variable that holds status.
ANS: F PTS: 1 REF: 46
8. In echoing input, the program tells the user
the desired form of the input data.
ANS: F PTS: 1 REF: 50
9. Three types of program structures are
sequence, selection, and loop.
ANS: T PTS: 1 REF: 51
10. A loop structure does not contain a decision point.
ANS: F PTS: 1 REF: 51
MULTIPLE CHOICE
1. A(n) ____ is a named set of statements that
perform some task or group of tasks within an application.
|
a.
|
method
|
c.
|
object
|
|
b.
|
class
|
d.
|
flowchart
|
ANS: A PTS: 1 REF: 32
2. There will always be only one class ____ for
each class.
|
a.
|
statement
|
c.
|
header
|
|
b.
|
method
|
d.
|
footer
|
ANS: C PTS: 1 REF: 33
3. A(n) ____ is the name of a programming object
- for example, a class, method, or variable.
|
a.
|
convention
|
c.
|
keyword
|
|
b.
|
identifier
|
d.
|
class header
|
ANS: B PTS: 1 REF: 33
4. In an interactive program, a ____ enters
data.
|
a.
|
disk
|
c.
|
user
|
|
b.
|
database
|
d.
|
graphical user interface
|
ANS: C PTS: 1 REF: 35
5. ____ constants do not have identifiers like
variables do.
|
a.
|
Alphabetic
|
c.
|
Unnamed
|
|
b.
|
Named
|
d.
|
Uncertain
|
ANS: C PTS: 1 REF: 36
6. String values are also called ____ values.
|
a.
|
unnamed
|
c.
|
alphabetic
|
|
b.
|
digit
|
d.
|
alphanumeric
|
ANS: D PTS: 1 REF: 36
7. Which of the following is correct if the data
type of inventoryItem is string?
|
a.
|
inventoryItem = 3
|
c.
|
inventoryItem = -9
|
|
b.
|
inventoryItem = “printer”
|
d.
|
inventoryItem = (printer)
|
ANS: B PTS: 1 REF: 39
8. Which of the following is correct if the data
type for weight is num?
|
a.
|
weight = 2.75
|
c.
|
weight = (2.75)
|
|
b.
|
weight = “2.75”
|
d.
|
weight = “heavy”
|
ANS: A PTS: 1 REF: 39
9. You can use named constants to make your
programs easier to understand by eliminating ____.
|
a.
|
constants
|
c.
|
strings
|
|
b.
|
variables
|
d.
|
magic numbers
|
ANS: D PTS: 1 REF: 40
10. The convention used in this book for named constants is ____
characters ____ underscores to separate words.
|
a.
|
uppercase, with
|
c.
|
lowercase, with
|
|
b.
|
uppercase, without
|
d.
|
lowercase, without
|
ANS: A PTS: 1 REF: 40
11. A(n) ____ statement stores the value of the right-hand side of the
expression in the memory location of the left-hand side.
|
a.
|
construct
|
c.
|
equals
|
|
b.
|
arithmetic
|
d.
|
assignment
|
ANS: D PTS: 1 REF: 41
12. The ___ dictate the order in which operations in the same
statement are carried out.
|
a.
|
sequence structures
|
c.
|
decision points
|
|
b.
|
named constants
|
d.
|
order of operations
|
ANS: D PTS: 1 REF: 42
13. In the following statement, which arithmetic operation is
performed first?
answer = a + b + c * d / e - f
|
a.
|
e-f
|
c.
|
c*d
|
|
b.
|
a+b
|
d.
|
d/e
|
ANS: C PTS: 1 REF: 43
14. In the following statement, which operation is done third?
answer = a + b + c * d / e - f
|
a.
|
a+b
|
c.
|
e-f
|
|
b.
|
b+c
|
d.
|
d/e
|
ANS: A PTS: 1 REF: 43
15. What is an equivalent way to write the following statement?
answer = a + b + c * d / e - f
|
a.
|
answer = a+b+(c*d)/(e-f)
|
c.
|
answer = a+b+(c*d/e-f)
|
|
b.
|
answer = a+b+(c*d)/e-f
|
d.
|
answer = a+b+c*(d/e)-f
|
ANS: B PTS: 1 REF: 43
16. What operator has the lowest precedence?
|
a.
|
+
|
c.
|
*
|
|
b.
|
/
|
d.
|
=
|
ANS: D PTS: 1 REF: 44
17. According to the rules of precedence, ____ has higher precedence
than addition.
|
a.
|
multiplication
|
c.
|
the equals sign
|
|
b.
|
subtraction
|
d.
|
assignment
|
ANS: A PTS: 1 REF: 44
18. What is one drawback to including program comments?
|
a.
|
They take up too much memory.
|
c.
|
You cannot use abbreviations.
|
|
b.
|
They must be kept current.
|
d.
|
They make a program difficult to read.
|
ANS: B PTS: 1 REF: 45
19. Programmers refer to programs that contain meaningful names as
____.
|
a.
|
external documentation
|
c.
|
internally consistent
|
|
b.
|
self-documenting
|
d.
|
applications
|
ANS: B PTS: 1 REF: 45
20. A ____ dictionary is a list of every variable name used in a
program.
|
a.
|
naming
|
c.
|
constant
|
|
b.
|
string
|
d.
|
data
|
ANS: D PTS: 1 REF: 46
21. Most modern programming languages are ____, meaning that you can
arrange your lines of code as you see fit.
|
a.
|
structured
|
c.
|
formatted
|
|
b.
|
columnar
|
d.
|
free-form
|
ANS: D PTS: 1 REF: 47
22. What is an advantage of using the practice of echoing input?
|
a.
|
The program is shorter.
|
|
b.
|
Memory usage is lower.
|
|
c.
|
There is less chance of syntax errors.
|
|
d.
|
The user is more likely to catch input
errors.
|
ANS: D PTS: 1 REF: 50
23. Sequences never include ____.
|
a.
|
terminations
|
c.
|
decisions
|
|
b.
|
tasks
|
d.
|
steps
|
ANS: C PTS: 1 REF: 51
24. With a ____ structure, you perform an action or event, and then
you perform the next action in order.
|
a.
|
loop
|
c.
|
selection
|
|
b.
|
decision
|
d.
|
sequence
|
ANS: D PTS: 1 REF: 51
25. In the ____ structure, instructions repeat based on a decision.
|
a.
|
sequence
|
c.
|
loop
|
|
b.
|
selection
|
d.
|
flowchart
|
ANS: C PTS: 1 REF: 52
COMPLETION
1. If an application contains only one method
that executes, that method is called the ____________________ method.
ANS: main
PTS: 1 REF: 32
2. ____________________ programs can accept data
without human intervention.
ANS:
Batch
batch
PTS: 1 REF: 35-36
3. A
____________________ constant is enclosed within quotation marks.
ANS: string
PTS: 1 REF: 36
4. ____________________ are named memory
locations with contents that can change.
ANS:
Variables
variables
PTS: 1 REF: 36
5. A variable ____________________ is a
statement that provides a data type and identifier for a variable.
ANS: declaration
PTS: 1 REF: 37
6. Until a variable is initialized, it holds an
unknown value referred to as ____________________.
ANS: garbage
PTS: 1 REF: 38
7. An operand that can be used to the right of
an operator is a(n) ____________________.
ANS: rvalue
PTS: 1 REF: 41
8. The equal sign is the ____________________
operator.
ANS: assignment
PTS: 1 REF: 41
9. Arithmetic operators have
____________________ associativity.
ANS:
left-to-right
left to right
PTS: 1 REF: 43
10. The ____________________ operator has the lowest precedence.
ANS: assignment
PTS: 1 REF: 44
11. Program comments are a type of ____________________ documentation.
ANS: internal
PTS: 1 REF: 44-45
12. A(n) ____________________ variable is not used for input or
output.
ANS: temporary
PTS: 1 REF: 47
13. A(n) ____________________ is a message that asks the user for a
response.
ANS: prompt
PTS: 1 REF: 48
14. A(n) ____________________ is a basic unit of programming logic.
ANS: structure
PTS: 1 REF: 51
15. In a(n) ____________________ structure, one of two branches of
logic is followed based on a decision.
ANS: selection
PTS: 1 REF: 52
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