Python for Data Analysis: Step-By-Step with Projects - Strings, Common Functions, and Methods

Why might you choose to use double quotes instead of single quotes when defining a string in Python?

• To make the string more readable

• To avoid errors when the string contains single quotes

• To allow the use of special characters

• To automatically convert the string to uppercase

What is the result of concatenating the strings 'Hello' and 'World' with a space in between?

• 'Hello-World'

• 'Hello, World'

• 'Hello World'

• 'HelloWorld'

Which function would you use to determine the data type of a variable in Python?

• print()

• type()

• len()

• str()

What is the index of the first character in a Python string?

• -1

• 0

• It depends on the string

• 1

How would you extract the substring 'data' from the string 'data science' using slicing?

• answer[2:6]

• answer[1:5]

• answer[3:7]

• answer[0:4]

What does the string method 'upper()' do?

• Finds the position of a substring

• Reverses the string

• Converts all characters to uppercase

• Converts all characters to lowercase

If you use the 'find()' method on a string and the substring is not found, what is returned?

• None

• An error message

• 0

• -1

What is the main advantage of using f-strings over the older format method in Python?

• They are more readable and concise

• They are faster to execute

• They allow for more complex operations

• They automatically handle errors

How can you include a variable's value within a string using f-strings?

• By using square brackets []

• By using curly braces {}

• By using the '+' operator

• By using parentheses ()

Which of the following is a correct way to format a string using an f-string?

• f'Hello, [name]'

• f'Hello, (name)'

• f'Hello, name'

• f'Hello, {name}'