Python Chapter 3

In Python the __________ symbol is used as the not-equal-to operator

!=

In Python the ___________ symbol is used as the equality operator

==

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

Compound

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

Conditionally

27) In flowcharting, the ________ symbol is used to represent a Boolean expression.

Diamond

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

False

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

False

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

False

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

False

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

False

What is the result of the following Boolean expression, given that x=5, y=3, z=8? not(x<y OR z>x) AND y<z

False

What is the result of the following Boolean expression, given that x=5, y=3, z=8? x<y AND z>x

False

34) Boolean variables are commonly used as ________ to indicate whether a specific condition exists.

Flags

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

Single alternative

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

True

Decision structures are also known as selection structures

True

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

True

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

True

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

True

What is the result of the following Boolean expression, given that x=5, y=3, z=8? x<y OR z>x

True

A Boolean variable can reference one of two values which are

True or False

When using the ______ logical operator, both subexpressions must be true for the compound expression to be true.

and

Multiple Boolean expressions can be combined by using a logical operator to create _____ expressions.

compound

A(n) _____________ structure is a logical design that controls the order in which a set of statements execute.

control

The decision structure that has two possible paths of execution is known as:

dual alternative

26)The ________ statement is used to create a decision structure.

if

Which of the following is the correct if clause to determine whether choice is anything other than 10?

if choice !=10:

Which of the following is the correct if clause to determine whether y is in the range of 10 through 50, inclusive?

if y>=10 and y<=50:

32) 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.

if-elif-else

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

if-else

33) The logical ________ operator reverses the truth of a Boolean expression.

not

When using the ______ logical operator, one or both of the subexpressions must be true for the compound expression to be true.

or

Which logical operators perform short-circuit evaluation?

or, and

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

relational

What does the following expression mean? x<=y

x is less than or equal to y