Strings

Question 1

True or False: You have to use double quotes for strings in Python

Answer 1

False - you can use single or double quotes

Question 2

How would you slice a string to get only certain letters in a string?

Answer 2

s = ‘abc’
s[0:2]

result = ‘ab’

Question 3

True or False: strings are immutable in Python and cannot be reassigned like lists

Answer 3

True - any string modification will result in the creation of a new string, thus O(n) time

Question 4

How can you add a letter to the end of a string in Python?

Answer 4

s = ‘abc’

s += ‘d’

This will result in a new string of O(n) time complexity

Question 5

How would you add the values ‘123’ and ‘456’?

Answer 5

n = int(‘123’)
m = int(‘456’)

result = n + m

Question 6

How would you create a string from 123 and 456

Answer 6

n = str(123)
m = str(456)

newString = n + m

Question 7

What is the built-in function to get the ASCII value of a character in Python?

Answer 7

ord(“a”)

Result is 97

Question 8

How can we combine strings using a delimiter in Python?

Answer 8

”“.join(strings)

This is a delimiter because it creates a new string with all other values included