python

Question 1

what method will you use to add 1 to the end of the list l = [1,2,3,4]?

Answer 1

l.append(1)

[1,2,3,4,1]

Question 2

what method will you use to add 1 to position 1 of the list l = [1,2,3,4]

Answer 2

l.insert(1, 1)

[1,1,2,3,4]

Question 3

what method will you use to add [1,2,3] to the end of the list l = [1,2,3,4]

Answer 3

l.extend([1,2,3])

[1,2,3,4,1,2,3]

Question 4

how would you access the 4th element in the list l = [1,2,3,4,5]

Answer 4

l[4] or l[-1]

5

Question 5

how would you remove 4 in the list l = [1,2,3,4,5]

Answer 5

l.remove(4)

[1,2,3,5]

Question 6

how would you remove the last and the 2nd element in the list l = [1,2,3,4,5]

Answer 6

l. pop()

l. pop(2)

Question 7

how would you sort the list l = [1,2,3,4,5] in asc order?

Answer 7

l.sort()

Question 8

how would you sort the list l = [1,2,3,4,5] in desc order?

Answer 8

l.sort(reverse=True)

Question 9

how would you reverse a list of items l = [1,2,3,4,5]?

Answer 9

l.reverse()

Question 10

how would you multiply all elements of a list = [1,2,3,4,5]?

Answer 10

import functools

functools.reduce(lambda a, b: a*b, list)

Question 11

how would you add all the numbers in a list = [1,2,3,4,5]?

Answer 11

sum(1,2,3,4,5)

Question 12

how would you contain only odd numbers of the list = [1,2,3,4,5]?

Answer 12

l = [1,2,3,4,5]
filter(lambda x: x % 2, l)
[1,3,5]

Question 13

how would you copy a list l = [1,2,3,4,5]

Answer 13

copy(l)

Question 14

how would you access first element of a dictionary dict = {‘name’:’noor’, ‘age’:27}

Answer 14

dict[‘name’]

Question 15

how would you delete age from the dictionary dict = {name: noor, age: 27}

Answer 15

del dict[‘age’]

Question 16

how would you delete the dictionary dict = {name: noor, age:27}

Answer 16

del dict