Topic 3

Question 1

functions have … and …

Answer 1

input
output

Question 2

print(object,…)

Answer 2

takes 1 or more object and prints their string representations

Question 3

len(object)

Answer 3

takes and object as input and counts the number of items or elements

Question 4

decomposition

Answer 4

the act of taking a big problem and breaking into small parts that are more easily solved

Question 5

abstraction

Answer 5

suppress unnecessary details
the abstraction of a function is what it accomplishes, what it requires as input and what it will produce as output
us
uses docstrings

Question 6

docstrings

Answer 6

or function specifications that we need to know to use the function
reduces risk of mistakes

Question 7

function characteristics

Answer 7

def function_name(<parameters>):
docstring
<codeblock>
return <value>
function_name(<input_arguments>)</input_arguments></value></codeblock></parameters>

Question 8

f the return statement contains an expression, … before
the value is returned

Answer 8

it is evaluated first,

Question 9

A return statement has meaning … a function only

Answer 9

inside

Question 10

In Python, every function … .If there are no return statements, then it returns …

Answer 10

returns something
None

Question 11

The return statement … . A function can have multiple return statements. When any one is executed, …

Answer 11

terminates the function execution
the function terminates

Question 12

how to indicate multiple values in a single return statement

Answer 12

separate by a comma

Question 13

tuple

Answer 13

a collection of objects separated by commas

Question 14

positional parameters

Answer 14

required, gets assumes as per sequence (pos1, pos2)

Question 15

optional parameters

Answer 15

if not given, default values assumed (opt1=10, opt2=1)

Question 16

Docstring format

Answer 16

1. Description section - describes the purpose of the function
2. Argument section - lists and explains input
3. Return section - lists and explains return values
4. Raises, Examples sections (we have not covered this)

Question 17

Scope

Answer 17

A variable is only available from inside the region it is created. This is called scope

Question 18

Global scope

Answer 18

A variable created in the main body of the Python code is a global variable and belongs to the global scope.

Question 19

Local scope

Answer 19

A variable created inside a function belongs to the local scope of that function and can only be used inside that function.