Ecpi - Cis121 - Programming Logic And Design - Ch 4

Front 1

Boolean expression

Back 1

A Boolean Expression is one that represents only one of two states, usually expressed as true or false

Front 2

if-then

Back 2

An if-then decision structure contains a tested Boolean expression and an action that is taken only when the expression is true

Front 3

if-then clause

Back 3

An if-then clause of a decision holds the action that results when the Boolean expression in the decision is true,

Front 4

else clause

Back 4

The else clause of a decision holds the action or actions that execute only when the boolean expression in the decision is false

Front 5

Relational comparison operators

Back 5

Relational comparison operators are the symbols that express Boolean comparisons.

Examples include = , > , <, <=, >=, <>

Front 6

Trivial Expression

Back 6

A trivial expression is one that always evaluates to the same value

Front 7

compound condition

Back 7

A compound condition is constructed when you need to ask multiple questions before determining an outcome

Front 8

And decision

Back 8

An And decision contains two or more decisions, all conditions must be true for an action to take place

Front 9

nested decision

Back 9

A nested decision or nested if, is a decision within either the if-then or else clause of take place

Front 10

cascading if statement

Back 10

A cascading if statement is a series of nested if statements

Front 11

conditional AND operator

Back 11

A conditional AND operator (or more simply, an AND Operator) is a symbols that you use to combine decisions so that two or more conditions must be true for an action to occur.

Front 12

Truth Tables

Back 12

Truth Tables are diagrams used in mathematics and logic to help describe the truth of its parts

Front 13

Short-circuit evaluation

Back 13

is a logical feature in which expressions in each part of a larger expression are evaluated only as far as necessary to determine final outcome

Front 14

OR decision

Back 14

An OR decision contains two or more decisions; if at least one condition is met, the resulting action takes place.

Front 15

Conditional OR operator

Back 15

A conditional OR operator (or, more simply, an OR operator) is a symbol that you use to combine decisions when any one condition can be true for an action to take place.

Front 16

logical NOT operator

Back 16

The logical NOT operator is a symbol that reverses the meaning of a Boolean expression

Front 17

range check

Back 17

When you use the range check, you compare a variable to a series of values that mark the limiting ends of ranges

Front 18

dead or unreachable path

Back 18

A dead or unreachable path is a logical path that can never be traveled

Front 19

Precedence

Back 19

Precedence is the quality of operation that determines the order in which it is evaluated

Front 20

1. The selection statement if quantity > 100 then discountRate = RATE is an example of a
a. Dual-alternative selection
b. Single alternative selection
c. Structured loop
d. All of the above

Back 20

b. Single alternative selection

Front 21

2. The selection statement if day of week = “Sunday” then price = Lower_Price else price is higher is an example of a
a. Dual-alternative selection
b. Single alternative selection
c. Unary
d. All of the above

Back 21

a. Dual-alternative selection

Front 22

3. All selection statements must have ___________.
a. A then clause
b. An else clause
c. Both a and b
d. None of the above

Back 22

A then clause

Front 23

4. An expression like amount < 10? Is a(n) ______________ expression.
a. Gregorian
b. Edwardian
c. Machiavellian
d. Boolean

Back 23

d. Boolean

Front 24

5. Usually, you compare only variables that have the same
a. Type
b. Size
c. Name
d. Value

Back 24

a. Type

Front 25

6. Symbols such as > and < are known as _____________ operators
a. Arithmetic
b. Sequential
c. Relational comparison
d. Scripting accuracy

Back 25

c. Relational comparison

Front 26

7. If you could use only three relational comparison operators, you could get by with _____.
a. Greater than, less than, and greater than or equal to
b. Equal to, less than, and greater than
c. Less than, less than or equal to and not equal to
d. Equal to, not equal to, and less than

Back 26

c. Less than, less than or equal to and not equal to

Front 27

8. If a > b is false, then which of the following is always true
a. A<=b
b. A<b
c. A=b
d. A>=b

Back 27

a. A<=b

Front 28

9. Usually, the most difficult comparison operator to work with is ________________
a. Equal to
b. Greater than
c. Less than
d. Not equal to

Back 28

d. Not equal to

Front 29

10. Which lettered choice is equivalent to the following decision?
If x> 10 then
If y>10 then
Output “x”
Endif
Endif

a. If x > 10 OR y > 10 then output “x”
b. If x > 10 AND x > x then output “x”
c. If y > x then output “x”
d. If x > 10 AND y > 10 then output “x”

Back 29

d. If x > 10 AND x > y then output “x”

Front 30

11. The Midwest Sales region of Acme Computer Company consists of five states Illinois, Indiana, Iowa, Missouri and Wisconsin. About 50 % of the regional customer reside in Illinois, 20 percent of Indiana, and 10 percent in each of the other three states. Suppose you have input records containing ACME customer data, including state of residence. To most efficiently select and display all customers who live in the Midwest Sales region, you would ask first about residency in ______________
a. Illinois
b. Indiana
c. Either Iowa, Missouri, o0r Wisconsin – It does not matter which of these three is first
d. Any of the five states – it does not matter which one is first

Back 30

a. Illinois

Front 31

12. The Boffo Balloon Company makes helium balloons. Large Balloons cost $13.00 a dozen. Medium sized balloons cost $8.60 a dozen. About 60% of the company’s sales are of the smallest balloons, 30 percent are medium, and large balloons constitute only 10 percent of sales. Customer order records include customer information, quantity ordered, and size. To write a program that makes the most efficient determination of an orders’ price based on size ordered, you should first ask first weather the size is _____________?
a. Large
b. Medium
c. Small
d. It does not matter

Back 31

c. Small

Front 32

13. The Boffo Balloon company makes helium balloons in three sizes, 12 colors and with a choice of 40 imprinted sayings. As a promotion, the company is offering a 25% discount on orders of large, red balloons, imprinted with the string “ Happy Valentines Day”, To most efficiently select the orders to which a discount applies, you would use _____________
a. Nested if statements using OR logic
b. Nested if statement using AND logic
c. Three completely separate unnested if statements
d. Not enough information is given

Back 32

b. Nested if statement using AND logic

Front 33

14. In the following pseudocode, what percentage raise will an employee in Department 5 receive
If department < 3 then
Raise = SMALL_RAISE
Else
If department is < 5 then
Raise = MED_RAISE
Else
RAISE = BIG_RAISE
Endif
endif
a. SMALL_RAISE
b. MEDIUM_RAISE
c. BIG_RAISE
d. Impossible to tell

Back 33

c. BIG_RAISE

Front 34

15. In the following pseudocode, what percentage raise will an employee in Department 8 Receive
If department < 5 then
Raise = SMALL_RAISE
Else
If department is < 14 then
Raise = MEDIUM RAISE
Else
If department < 9 then
Raise = BIG_RAISE
Endif
Endif
endif
a. SMALL_RAISE
b. MEDIUM_RAISE [department 8 executes on less than 14 and does not have a chance to reach the ,9 option]
c. BIG_RAISE
d. Impossible to tell

Back 34

b. MEDIUM_RAISE [department 8 executes on less than 14 and does not have a chance to reach the ,9 option]

Front 35

16. In the following pseudocode, what percentage raise will an employee in department 10 receive?
If department < 2 then
Raise = SMALL_RAISE
Else
If department is < 6 then
Raise = MEDIUM RAISE
Else
If department < 10 then
Raise = BIG_RAISE
Endif
Endif
endif
a. SMALL_RAISE
b. MEDIUM_RAISE
c. BIG_RAISE
d. Impossible to tell [Department 10 is not < 10, therefore no match is made]

Back 35

d. Impossible to tell [Department 10 is not < 10, therefore no match is made]

Front 36

17. When you use a range check, you compare a variable to the _____________ value in the range
a. Lowest
b. Middle
c. Highest
d. Lowest or highest

Back 36

d. Lowest or highest

Front 37

18. If sales = 100, rate = .10 and expenses = 50, which of the following expressions is true?
a. Sales => expenses AND rate < 1
b. Sales < 200 OR expenses < 100
c. Expenses = rate OR sales = rate
d. Two of the above

Back 37

a. Sales => expenses AND rate < 1
b. Sales < 200 OR expenses < 100
d. Two of the above

Front 38

19. If a is true, and c is false, which of the following expressions is true
a. a OR b AND c
b. a AND b AND c
c. a AND b or C
d. two of the above

Back 38

c. a AND b or C

Front 39

20. If d is true, e is false, and f is false, which of the following expressions is true
a. e OR f AND d
b. f AND d OR e
c. d OR e AND f
d. two of the above

Back 39

c. d OR e AND f