Data Types

Question 1

Strings are mutable or immutable?

Answer 1

immutable

Question 2

Lists are mutable or immutable?

Answer 2

mutable

Question 3

Tuples are mutable or immutable?

Answer 3

immtable

Question 4

in string indexing, str[-1] refers to what?

Answer 4

the las character

Question 5

what is the use of List.append()?

Answer 5

add elements to list

Question 6

what is diffrent between list.append() and list.insert() ?

Answer 6

append() method only works for addition of elements at the end of the List, for addition of element at the desired position, insert() method is used. Unlike append() which takes only one argument, insert() method requires two arguments(position, value).

Question 7

what is the use of List.extend()?

Answer 7

used to add multiple elements at the same time at the end of the list

Question 8

how sums up list number?

Answer 8

sum(list)

Question 9

what is Set ?

Answer 9

Set is an unordered collection of data type that is iterable, mutable and has no duplicate elements.

Question 10

what is major adavantage f using a set over list?

Answer 10

The major advantage of using a set, as opposed to a list, is that it has a highly optimized method for checking whether a specific element is contained in the set , removing duplicates from a sequence, and computing mathematical operations such as intersection, union, difference, and symmetric difference

Question 11

what is the diffrence between array and list

Answer 11

If you create arrays using the array module, all elements of the array must be of the same type.

Question 12

what is Dictionary?

Answer 12

Dictionary in Python is an unordered collection of data values, used to store data values like a map, which unlike other Data Types that hold only single value as an element

Question 13

what is advantage of key:value pair in dictaionary?

Answer 13

Dictionary holds key:value pair. Key value is provided in the dictionary to make it more optimized.