Quiz 2 Chapter 2: Software Development, Data Types, and Expressions

• Question 1

  4 out of 4 points

  	What statement accurately reflects the difference between the quotient operator and the division operator?
  	Correct Answer: d.  The quotient operator produces an integer, while the division operator produces a float.

• Question 2

  4 out of 4 points

  	In the waterfall development model, what is the most expensive part of software development?
  	Correct Answer: b.  The maintenance phase.

• Question 3

  4 out of 4 points

  	What function can you call inside of IDLE to show the resources of the math module, once it has been imported?
  	Correct Answer: c.  dir(math)

• Question 4

  4 out of 4 points

  	Which of the following functions and expressions will convert the ASCII character "Z" to its numeric equivalent ASCII code?
  	Correct Answer: a.  ord('Z')

• Question 5

  4 out of 4 points

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

• Question 6

  4 out of 4 points

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

• Question 7

  4 out of 4 points

  	Modern software development is usually incremental and iterative.
  	Correct Answer:  True

• Question 8

  4 out of 4 points

  	What print statement will output a single '\' character?
  	Correct Answer: c.  print('\\')

• Question 9

  4 out of 4 points

  	Expressions provide an easy way to perform operations on data values to produce other data values.
  	Correct Answer:  True

• Question 10

  4 out of 4 points

  	1,500 is a valid integer literal in Python.
  	Correct Answer:  False

• Question 11

  4 out of 4 points

  	Real numbers have infinite precision, which means that the digits in the fractional part can continue forever.
  	Correct Answer:  True

• Question 12

  4 out of 4 points

  	You can use parentheses to change the order of evaluation in an arithmetic expression.
  	Correct Answer:  True

• Question 13

  4 out of 4 points

  	string is an example of a data type in Python.
  	Correct Answer:  False

• Question 14

  0 out of 4 points

  	How does the int function convert a float to an int?
  	Correct Answer: b.  By removing the fractional value of the number.

• Question 15

  4 out of 4 points

  	Variables receive their initial values and can be reset to new values with an assignment statement.
  	Correct Answer:  True

• Question 16

  4 out of 4 points

  	In Python, \b is a escape sequence that represents a horizontal tab.
  	Correct Answer:  False

• Question 17

  4 out of 4 points

  	The cost of developing software is spread equally over the phases.
  	Correct Answer:  False

• Question 18

  4 out of 4 points

  	In Python, what data type is used to represent real numbers between -10^308 and 10^308 with 16 digits of precision?
  	Correct Answer: a.  float

• Question 19

  4 out of 4 points

  	In evaluating the precedence rules used by Python, what statement is accurate?
  	Correct Answer: c.  Exponentiation has the highest precedence.

• Question 20

  0 out of 4 points

  	What statement accurately describes the analysis phase of the waterfall model?
  	Correct Answer: c.  In this phase, the programmers determine what the program will do.

• Question 21

  4 out of 4 points

  	You are reviewing the code written by another programmer, and encounter a variable whose name is entirely in capital letters. What might you discern from this variable name?
  	Correct Answer: c.  The variable is a symbolic constant.

• Question 22

  4 out of 4 points

  	Functions that are always available in Python come from what module?
  	Correct Answer: b.  __builtin__

• Question 23

  4 out of 4 points

  	What effect does the following print statement have? print("Hello" * 5)
  	Correct Answer: a.  The print statement will produce "HelloHelloHelloHelloHello".

• Question 24

  4 out of 4 points

  	What is the largest value of an int data type in the Python programming language?
  	Correct Answer: b.  The value is limited only by the memory of the host computer.

• Question 25

  4 out of 4 points

  	Text processing is by far the least common application of computing.
  	Correct Answer:  False