Python

Question 1

variable

Answer 1

a named location in memory that stores a value which can be changed during execution

Question 2

naming rules of variables

Answer 2

1. no spaces, symbols
2. start with a letter
3. don’t use reserved rules

Question 3

name some string functions

Answer 3

• capatalise()
• count()
• find()
• index()
• isalnum()
• isalpha()
• lower()
• upper()

Question 4

syntax for f-strings

Answer 4

print(f”Name:{name}, Age:{name}, Heigt:{name}”)

Question 5

truthy values

Answer 5

• non-0 numbers
• non-empty strings
• non-empty data structures

Question 6

falsey values

Answer 6

• 0
• none (python equivalent to Null)
• empty string
• empty data structures

Question 7

match-case statement

Question 8

list syntax

Answer 8

[]

Question 9

list functions

Answer 9

• append(item)
• insert(index, item)
• pop(index)
• remove(item)
• index(item)
• clear()
• reverse()
• sort()

Question 10

tuple definition

Answer 10

ordered, one-dimensional array of objects that is immutable meaning once it is assigned it cannot be changed

Question 11

tuple functions

Answer 11

• count(item)
• index(item)

Question 12

tuple syntax

Answer 12

()

Question 13

set syntax

Answer 13

{}

Question 14

set definition

Answer 14

an un-ordered, one-dimensional array of object
- can’t index items
- set is mutable BUT set data is immutable
- set data is unique - no duplicates
- does not all have to be of the same time

Question 15

set functions

Answer 15

• union(setB)
• intersection(setB)
• difference(setB)
• add(item)
• discard(item)

Question 16

dictionary definition

Answer 16

ordered, one-dimensional array of key:value pairs
- the key is immutable & can be used to index values in the dict

Question 17

dict functions

Answer 17

• clear()
• get(key)
• items()
• keys()
• pop(key)
• values()

Question 18

break

Answer 18

immediately exits a loop

Question 19

continue

Answer 19

jump directly to the while statement

Question 20

else

Answer 20

excuted once the loop ends

Question 21

parameteres of in range()

Answer 21

in range(start, stop, loop)

Question 22

list comprehension

Answer 22

newlist = [expression for item in data_structure if logical_condition]

Question 23

statement to strip and and read a file

Answer 23

list = [line.strip(“ “) for line in list]

Question 24

docstring definition

Answer 24

first statement in a module, function, class ore method definition

Question 25

docstring syntax

Answer 25

""" Definition Args Returns """

Question 26

3 types of parameters

Answer 26

1. by position only with 2. by position or keyword 3. by keyword only

Question 27

position-only parameters

Answer 27

- parameters placed before a / - can be helpful in cases where the order of the arguments are more important than their names

Question 28

keyword-only parameters

Answer 28

- parameters placed before a * - can be useful to enforce the use of keyword arguments for certain parameters, such as optional parameters with a default value OR - to clearly distinguish between mandatory and optional arguments

Question 29

optional arguments

Answer 29

- parameters without a default value are required - when defining a function, required parameters need to be specified before the optional ones - useful in combination with keyword arguments to specify exactly which parameter to provide a value each time a function is called

Question 30

args

Answer 30

a tuple & contains all non-keyword arguments passed in when the function is called

Question 31

*args

Answer 31

variable amount of arguments

Question 32

**kwargs

Answer 32

variable amount of arguments formatted as dictionary

Question 33

recursive function characteristics

Answer 33

1. must have a base case 2. change the arguments & more towards a base case 3. call itself

Question 34

statement to open a file

Answer 34

with open("path/to/thefile.txt", "r") as file:

Question 35

w for opening files

Answer 35

write - overwrite the current contents

Question 36

a for opening files

Answer 36

append - add onto the current contents