Question

Please solve everything using Python 3

1.Given the following line of code, what is the value of the expression nums.index(20)?

nums = [30, 80, 40, 80, 20, 20, 70, 30, 80]

a. 2

b. 3

c. 4

d. 5

2. Given the following line of code, what is the value of the expression nums.count(80)?

nums = [30, 80, 40, 80, 20, 20, 70, 30, 80]

a. 1

b. 2

c. 3

d. 4

3. Given the following line of code, what is the value of the expression nums.index(80, 2)?

nums = [30, 80, 40, 80, 20, 20, 70, 30, 80]

a. 1

b. 2

c. 3

d. 4

Answer 1

nums = [30, 80, 40, 80, 20, 20, 70, 30, 80]
print(nums.index(20))
print(nums.count(80))
print(nums.index(80, 2))

#output
4
3
3

1) c- 4

reason : index functions searches and returns first occurring instance of given value. first occurrence of 20 is index 4

2) c - 3

reason : count function counts the occurrences of given number. count of 80 is 3

3) c - 3

reason : index( 80,2) starts the search from 2 index and search for element 80. since 80 occurs at index 3 if search begins from 2 index hence 3 is returned.