Types

Question 1

What is a sequence type?

Answer 1

A construct that contains a collection of objects.

Question 2

What is len()?

Answer 2

A function that returns the length of a sequence type.

Question 3

How do you return an object from a specified index?

Answer 3

Write the sequence name with brackets containing the desired index value.

Question 4

What value is the first index in a sequence?

Answer 4

0

Question 5

Can strings be changed?

Answer 5

No.

Question 6

How is concatenation performed?

Answer 6

Adding two or more strings together with the + operator. Can be done with literals or variables.

Question 7

What are the Format-string specification types?

Answer 7

s - String: Default.
d - Decimal (integer)
,d - Decimal with commas (integer)
x - hexadecimal
e - exponent notation.
f - fixed point notation
.[x]f fixed point to x spaces.
,.[x]f fixed point with commas.

Question 8

What is a container?

Answer 8

A construct used to group related values together and contain references to other objects instead of data.

Question 9

What is a list?

Answer 9

A mutable container created by surrounding a group of variables or literals with brackets.

Question 10

What is an element?

Answer 10

A single list item.

Question 11

What is append()?

Answer 11

A function that adds an item to the end of a list.

Question 12

What is pop(x)?

Answer 12

A function that removes the item at index x in a list.

Question 13

What is remove(x)?

Answer 13

A function that removes the first item of x value.

Question 14

What is min(list)?

Answer 14

A function that returns the smallest value in a list.

Question 15

What is sum(list)?

Answer 15

A function that returns the sum of all items in a list.

Question 16

What is List.index(x)?

Answer 16

A function that returns the location of an item in a sequence.

Question 17

What is list.count(x)?

Answer 17

A function that returns the amount of instances of x in a list.

Question 18

What is a tuple?

Answer 18

It is similar to a list but cannot be changed.

Question 19

What is a named tuple?

Answer 19

It allows the user to create a simple data type. It is not built-in.

Question 20

What is a set?

Answer 20

An unordered collection of items. Does not contain multiples of the same item.

Question 21

Can the index be used in a set?

Answer 21

No.

Question 22

How is a set created?

Answer 22

By placing a list either between curly braces({[]}), or in the set function (set()).

Question 23

How is an empty set created.

Answer 23

It must be done using set().

Question 24

Does list share it’s functions with set?

Answer 24

No. It does have remove and pop, however it has add() instead of append().

Question 25

What is add(x)?

Answer 25

A function that adds the value x into a set.

Question 26

What is Set1.update(set2)?

Answer 26

A function that takes the items in one set and adds them to another.

Question 27

What is clear()?

Answer 27

A function that clears all items from a set.

Question 28

What is set.intersection(x, y, z)?

Answer 28

A function that returns a set containing the items common between multiple sets.

Question 29

What is set.union(x, y, z)?

Answer 29

A function that returns a set with all unique items from each set.

Question 30

What is set.difference(x, y, z)?

Answer 30

A function that returns a set with only the elements that are not found in any of the parenthetical sets.

Question 31

What is set1.symmetric_difference(set2)?

Answer 31

A function that returns a set with only items that appear in exactly one of set1 or set2.

Question 32

What is a dictionary?

Answer 32

A collection of keys and values.

Question 33

What is a key in a dictionary?

Answer 33

An item of any immutable type that is associated with a value.

Question 34

How is a dictionary created?

Answer 34

By using curly braces surrounding {key : value} pairs.

Question 35

How are items in dictionaries accessed?

Answer 35

They must be accessed by using the key. Indexing is not an option.

Question 36

How are items added to a dictionary?

Answer 36

dictionary_name[key] = value

Question 37

Are dictionaries immutable?

Answer 37

No. The values can be changed the same way items are added, except using keys already present in the dictionary.

Question 38

How are items removed from dictionaries?

Answer 38

By using the delete keyword del. del dictionary_name[key].

Question 39

What is an implicit conversion?

Answer 39

Any conversion between types that the interpreter makes automatically.

Question 40

What is the dict.keys() function?

Answer 40

A function that returns every key in a dictionary.

Question 41

What is dict.values()?

Answer 41

A function that returns every value in dict.

Question 42

What is dict.items()?

Answer 42

A function that returns every key value pairs in dict.

Question 43

What is the meaning of empty curly brackets in a print function?

Answer 43

It serves as a placeholder for any variables. Print('{} is not {}', x, y) Output: x is not y