Question 1

Expressions provide an easy way to perform operations on data values to produce other data values.

Accepted Answer

A) True 
 B)False

Question 2

What are the two different means by which a floating-point number can be written? (Choose two.)

Accepted Answer

A)   decimal notation
B)   line notation
C)   scientific notation
D)   octal notationE) A) and B)
F) All of the above

Question 3

Modern software development is usually incremental and iterative.

Accepted Answer

A) True 
 B)False

Question 4

Exponentiation and assignment operations are left associative.

Accepted Answer

A) True 
 B)False

Question 5

Python is a loosely typed programming language.

Accepted Answer

A) True 
 B)False

Question 6

In Python, what does the "%" operator do in the expression 6 % 4?

Accepted Answer

A)   It performs an exponentiation to the 4th power.
B)   It returns a remainder or modulus.
C)   It returns a float as a result of division.
D)   It returns the percentage of the operation.E) A) and B)
F) B) and D)

Question 7

The modulus operator has the highest precedence and is evaluated first.

Accepted Answer

A) True 
 B)False

Question 8

In the waterfall development model, what is the most expensive part of software development?

Accepted Answer

A)   The design phase.
B)   The integration phase.
C)   The maintenance phase.
D)   The analysis phase.E) B) and C)
F) A) and D)

Question 9

Computer scientists refer to the process of planning and organizing a program as software development.

Accepted Answer

A) True 
 B)False

Question 10

In evaluating the precedence rules used by Python, what statement is accurate?

Accepted Answer

A)   Exponentiation has the highest precedence.
B)   Multiplication is evaluated before unary multiplication.
C)   Addition and subtraction are evaluated after assignment.
D)   Exponentiation and assignment operations are left associative.E) B) and C)
F) A) and B)

Question 11

In Python, % is the exponentiation operator.

Accepted Answer

A) True 
 B)False

Question 12

What statement accurately describes what a semantic error is?

Accepted Answer

A)   A semantic error is the result of an expression that is syntactically incorrect.
B)   A semantic error occurs when an expression is syntactically correct, but the expression cannot be carried out.
C)   A semantic error happens when an expression attempts to perform operations between incompatible data types.
D)   A semantic error is the result of an improperly nested if statement.E) All of the above
F) C) and D)

Question 13

What effect does the following print statement have? print("Hello" * 5)

Accepted Answer

A)   The string "Hello" is converted into an int type of value 1 and then multiplied by 5, producing "5".
B)   The string is indexed and the character count is multiplied with the total number of characters in the string, producing "25".
C)   The print statement produces a type error as you cannot multiply a string type with an integer type.
D)   The print statement will produce "HelloHelloHelloHelloHello".E) A) and B)
F) A) and C)

Question 14

Which of the following literals would be considered a float type in Python?

Accepted Answer

A)   -1
B)   3.14
C)   '88'
D)   5E) A) and D)
F) B) and D)

Question 15

A variable associates a name with a value, making it easy to remember and use the value later in a program.

Accepted Answer

A) True 
 B)False

Question 16

What is the total number of distinct values in the ASCII set?

Accepted Answer

A)   64
B)   128
C)   256
D)   512E) A) and D)
F) A) and C)

Question 17

The cost of developing software is spread equally over the phases.

Accepted Answer

A) True 
 B)False

Question 18

When the Python interpreter evaluates a literal, the value it returns is simply that literal.

Accepted Answer

A) True 
 B)False

Question 19

In general, a variable name must begin with either a letter or an underscore (_).

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is NOT a valid name that can be used for a variable?

Accepted Answer

A)   total
B)   1ending
C)   propertyValue
D)   TESTE) A) and C)
F) B) and C)

Exam 2: Software Development Data Types and Expressions

In Python, % is the exponentiation operator.

Correct AnswerverifiedShow Answer

When the Python interpreter evaluates a literal, the value it returns is simply that literal.

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Exponentiation and assignment operations are left associative.

Correct AnswerverifiedShow Answer

A variable associates a name with a value, making it easy to remember and use the value later in a program.

Correct AnswerverifiedShow Answer

What is the total number of distinct values in the ASCII set?

Correct AnswerverifiedShow Answer

Computer scientists refer to the process of planning and organizing a program as software development.

Correct AnswerverifiedShow Answer

In Python, what does the "%" operator do in the expression 6 % 4?

Correct AnswerverifiedShow Answer

In general, a variable name must begin with either a letter or an underscore (_).

Correct AnswerverifiedShow Answer

In evaluating the precedence rules used by Python, what statement is accurate?

Correct AnswerverifiedShow Answer

In the waterfall development model, what is the most expensive part of software development?

Correct AnswerverifiedShow Answer

Expressions provide an easy way to perform operations on data values to produce other data values.

Correct AnswerverifiedShow Answer

What statement accurately describes what a semantic error is?

Correct AnswerverifiedShow Answer

The cost of developing software is spread equally over the phases.

Correct AnswerverifiedShow Answer

Modern software development is usually incremental and iterative.

Correct AnswerverifiedShow Answer

The modulus operator has the highest precedence and is evaluated first.

Correct AnswerverifiedShow Answer

Which of the following is NOT a valid name that can be used for a variable?

Correct AnswerverifiedShow Answer

Python is a loosely typed programming language.

Correct AnswerverifiedShow Answer

What are the two different means by which a floating-point number can be written? (Choose two.)

Correct AnswerverifiedShow Answer

What effect does the following print statement have? print("Hello" * 5)

Correct AnswerverifiedShow Answer

Which of the following literals would be considered a float type in Python?

Correct AnswerverifiedShow Answer

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