Hackerrank String Manipulation and Methods

Question 1

What is the output of the following code?

python
s = 'HackerRank'
print(s[2:7:2])

Accepted Answer

cRn

Answer

ckea

Answer

cke

Answer

ckR

Question 2

What does the following expression evaluate to?

python
'hello world'.split(' ', 1)

Accepted Answer

['hello', 'world']

Answer

['hello world']

Answer

['h', 'ello world']

Answer

['hello', ' ', 'world']

Question 3

Which expression correctly formats the float 3.14159 to exactly 2 decimal places as the string '3.14'?

Accepted Answer

'{:.2f}'.format(3.14159)

Answer

str(round(3.14159, 2))

Answer

'{:2f}'.format(3.14159)

Answer

format(3.14159, '2d')

Question 4

What is the result of the following code?

python
words = ['py', 'thon', 'rocks']
print('-'.join(words))

Accepted Answer

py-thon-rocks

Answer

['py', 'thon', 'rocks']

Answer

py thon rocks

Answer

pythonn-rocks

Question 5

What does '  hello  '.strip() return?

Accepted Answer

'hello'

Answer

'  hello  '

Answer

'hello  '

Answer

'  hello'

Question 6

What is the output of the following?

python
s = 'abcabc'
print(s.replace('b', 'X', 1))

Accepted Answer

aXcabc

Answer

aXcaXc

Answer

abcaXc

Answer

aXXabc