Strings, Lists, Dictionaries, Tuples, and Sets.

Question 1

What are strings?

Answer 1

Strings are sequences of characters, using the syntax of either single quotes or double quotes:
Ex. ‘hello’, “Hello”, “I don’t do that”.

Question 2

Because strings are ordered sequences it means we can use _______ or ________.

Answer 2

indexing, slicing.

Question 3

Indexing allows you to grab a single character or a subsection of multiple characters of a ordered sequence?

Answer 3

a single character.

Question 4

Slicing allows you to grab a single character or a subsection of multiple characters of a ordered sequence?

Answer 4

subsection of multiple characters of a string.

Question 5

Give the syntax for indexing the last character of the string Hi = “Hello World”.

Answer 5

In: Hi[-1]

or the one liner: “Hello World”[-1].

Question 6

Give the syntax to reverse the order of the string Hi = “Hello World” using slicing.

Answer 6

In: Hi[ : : -1]

Question 7

True/False: Arithmetic can be applied to variables.

Answer 7

True, two methods that was given was catenation and string multiplication.

Question 8

Describe what string catenation does.

Answer 8

String catenation uses slicing to grab a subsection of a string to transform into another string.
ex. 
In:    name = 'Sam' 
In:    last_letters = name[1: ]
Out: am
In:    'P' + last_letters
Out: Pam

Question 9

Describe what string multiplication does.

Answer 9

String multiplication multiplies a string.
ex.
In:    letter = 'z'
In:    letter*10
Out: 'zzzzzzzzzz'

Question 10

String interpolation, sticking variables into strings, was taught using two methods. The format method and f-string. Give a basic example of how to use format method.

Answer 10

Format method:
Ex1. print(‘The {2} {1} {0}’.format(‘fox’, ‘brown’, ‘quick’))
Ex2. name = ‘Carlos’
print(‘Hello, my name is {}’.format(‘name’))

Question 11

String interpolation, sticking variables into strings, was taught using two methods. The format method and f-string. Give a basic example of how to use f-string method.

Answer 11

f-string method:
Ex1. name = ‘Carlos’
age = ‘35’
print(f’{name} is my name and I am {age} years old.’)

Question 12

What are lists?

Answer 12

Lists are ordered sequences that can hold a variety of object types.

Question 13

Since lists are ordered sequences, they support what three concepts?

Answer 13

Slicing, indexing and nesting.

Question 14

Give a general syntax of indexing.

Answer 14

In: variable = data type
In: variable[index_number]
or
In: ‘data_type’[index_number] for strings only.

Question 15

Give a general syntax of slicing.

Answer 15

In: variable = data type
In: variable[start:stop:step]
or
In: ‘data_type’[start:stop:step] for strings only.

Question 16

What are dictionaries in python?

Answer 16

Dictionaries are unordered mappings for storing objects.

Question 17

What is the key difference between dictionaries and lists?

Answer 17

Dictionaries are unordered mappings so they cannot utilize functions like slicing, indexing and sorting; whereas lists are ordered sequences which can.

Question 18

___________ & ____________ are mutable, but ___________ are immutable.

Answer 18

Lists, dictionaries, tuples.

Question 19

When creating one of these data types, each data type uses a unique character to enclose their data. Strings use ___, lists use ___, dictionaries use ___, tuples use ___.
When recalling data though, they all use the same characters __.

Answer 19

’’, [], {}, (); []

Question 20

Tuples are similar to lists. The key difference is that tuples are __________.

Answer 20

immutable.

Question 21

What are sets?

Answer 21

Sets are unordered collections of unique elements. They give only one representation of multiple elements. 
Thus,
In:    list = [1,2,1,1,3,4,4,4]
In:    set(list)
Out: (1,2,3.4)

Question 22

What are booleans?

Answer 22

Booleans are operators that allow you to convey True or False statements.