Week 3

Question 1

The Python language is not sensitive to block structuring of code.

Answer 1

False

Question 2

The if statement causes one or more statements to execute only when a Boolean expression is true.

Answer 2

True

Question 3

Python allows you to compare strings, but it is not case sensitive.

Answer 3

False

Question 4

Nested decision statements are one way to test more than one condition.

Answer 4

True

Question 5

Python uses the same symbols for the assignment operator as for the equality operator.

Answer 5

False

Question 6

The not operator is a unary operator which must be used in a compound expression.

Answer 6

False

Question 7

Short -circuit evaluation is only performed with the not operator.

Answer 7

False

Question 8

Expressions that are tested by the if statement are called Boolean expressions.

Answer 8

True

Question 9

Decision structures are also known as selection structures.

Answer 9

True

Question 10

An action in a single alternative decision structure is performed only when the condition is true.

Answer 10

True

Question 11

A(n) __________ structure is a logical design that controls the order in which a set of statements execute.
a. function
b. control
c. sequence
d. iteration

Answer 11

b. control

Question 12

The decision structure that has two possible paths of execution is known as
a. single alternative
b. double alternative
c. dual alternative
d. two alternative

Answer 12

c. dual alternative

Question 13

Multiple Boolean expressions can be combined by using a logical operator to create __________ expressions.
a. sequential
b. logical
c. compound
d. mathematical

Answer 13

c. compound

Question 14

When using the __________ logical operator, one or both of the subexpressions must be true for the compound expression to be true.
a. or
b. and
c. not
d. maybe

Answer 14

a. or

Question 15

Which logical operators perform short-circuit evaluation?
a. or, not
b. not, and
c. or, and
d. and, or, not

Answer 15

b. not, and

Question 16

Which of the following is the correct if clause to determine whether y is in the range 10 through 50, inclusive?
a. if 10 < y or y > 50:
b. if 10 > y and y < 50:
c. if y >= 10 and y <= 50:
d. if y >= 10 or y <= 50:

Answer 16

c. if y >= 10 and y <= 50:

Question 17

A Boolean variable can reference one of two values which are
a. yes or no
b. True or False
c. or F
d. Y or N

Answer 17

b. True or False

Question 18

What is the result of the following Boolean expression, given that x = 5, y = 3, and z = 8?
x < y or z > x
a. True
b. False
c. 8
d. 5

Answer 18

a. True

Question 19

What does the following expression mean?
x <= y
a. x is less than y
b. x is less than or equal to y
c. x is greater than y
d. x is greater than or equal to y

Answer 19

b. x is less than or equal to y

Question 20

Which of the following is the correct if clause to determine whether choice is anything other than 10?
a. if choice != 10:
b. if choice != 10
c. if choice <> 10:
d. if not(choice < 10 and choice > 10):

Answer 20

a. if choice != 10:

Question 21

When using the __________ logical operator, both subexpressions must be true for the compound expression to be true.
a. or
b. and
c. not
d. either or or and D

Answer 21

b. and

Question 22

In Python the __________ symbol is used as the not-equal-to operator.
a. ==
b. <>
c. <=
d. !=

Answer 22

d. !=

Question 23

In Python the __________ symbol is used as the equality operator.
a. ==
b. <>
c. <=
d. !=

Answer 23

a. ==

Question 24

The ___________ statement is used to create a decision structure.

Answer 24

if

Question 25

In flowcharting, the __________ symbol is used to represent a Boolean expression.

Answer 25

diamond

Question 26

A(n) __________ decision structure provides only one alternative path of execution.

Answer 26

single alternative

Question 27

In a decision structure, the action is ___________ executed because it is performed only when a specific condition is true.

Answer 27

conditionally

Question 28

A(n) __________ operator determines whether a specific relationship exists between two values.

Answer 28

relational

Question 29

A(n) __________ statement will execute one block of statements if its condition is true or another block if its condition is false.

Answer 29

if-else

Question 30

Python provides a special version of a decision structure known as the __________ statement, which makes the logic of the nested decision structure simpler to write.

Answer 30

if-elif-else

Question 31

The logical __________ operator reverses the truth of a Boolean expression.

Answer 31

not

Question 32

Boolean variables are commonly used as __________ to indicate whether a specific condition exists.

Answer 32

flags

Question 33

A(n) ___________ expression is made up of two or more Boolean expressions.

Answer 33

compound