Functions

Question 1

(True/False) The function body is referred to as its suite.

Answer 1

False. The function body is referred to as its block.

Question 2

(True/False) A function’s local variables exist after the function returns to its caller.

Answer 2

False. A function’s local variables exist until the function returns to its caller.

Question 3

(Fill-In) A function with multiple parameters specifies them in a(n) ________.

Answer 3

comma-separated list.

Question 4

(True/False) When defining a function in IPython interactive mode, pressing Enter on a blank line causes IPython to display another continuation prompt so you can continue defining the function’s block

Answer 4

False. When defining a function in IPython interactive mode, pressing Enter on a blank line terminates the function definition.

Question 5

(Fill-In) The element of chance can be introduced into computer applications using module _________.

Answer 5

random.

Question 6

(Fill-In) The random module’s __________ function enables reproducibility of random sequences.

Answer 6

seed.

Question 7

(Fill-In) A(n) _______ defines related functions, data and classes. A(n) _________ groups related modules.

Answer 7

module, package.

Question 8

(Fill-In) Every Python source code (.py) file you create is a(n) ______.

Answer 8

module.

Question 9

(True/False) In IPython interactive mode, to view a list of identifiers defined in a module, type the module’s name and a dot (.) then press Enter.

Answer 9

False. Press Tab, not Enter.

Question 10

(True/False) Python does not have constants.

Answer 10

True.

Question 11

(True/False) When an argument with a default parameter value is omitted in a function call, the interpreter automatically passes the default parameter value in the call

Answer 11

True

Question 12

(True/False) Parameters with default parameter values must be the leftmost arguments in a function’s parameter list.

Answer 12

False. Parameters with default parameter values must appear to the right of parameters that do not have defaults.

Question 13

(True/False) You must pass keyword arguments in the same order as their corresponding parameters in the function definition’s parameter list.

Answer 13

False. The order of keyword arguments does not matter.

Question 14

(Fill-In) To define a function with an arbitrary argument list, specify a parameter of the form ________.

Answer 14

*args (again, the name args is used by convention, but is not required).

Question 15

(Fill-In) An identifier’s ________ describes the region of a program in which the identifier’s value can be accessed.

Answer 15

scope.

Question 16

(True/False) Once a code block terminates (e.g., when a function returns), all identifiers defined in that block “go out of scope” and can no longer be accessed.

Answer 16

True.

Question 17

(True/False) You must always import all the identifiers of a given module.

Answer 17

False. You can import only the identifiers you need by using a from…import statement.

Question 18

(Fill-In) The built-in function ______ returns an object’s unique identifier.

Answer 18

id.

Question 19

(True/False) Attempts to modify mutable objects create new objects.

Answer 19

False. This is true for immutable objects.

Question 20

(Fill-In) The stack operations for adding an item to a stack and removing an item from a stack are known as ______ and ______, respectively.

Answer 20

push, pop

Question 21

(Fill-In) A stack’s items are removed in order.

Answer 21

last-in, first-out (LIFO).

Question 22

(Discussion) Why do we often work with a sample rather than the full population?

Answer 22

Because often, the full population is unmanageably large.

Question 23

(True/False) An advantage of the population variance over the population standard deviation is that its units are the same as the sample values’ units.

Answer 23

False. This an advantage of population standard deviation over population variance.