Understanding Strings in Python

Which of the following is a valid string declaration?

• string = "Hello"

• string = 'Hello'

• string = """Hello"""

• All of the above

How do you get the length of a string s?

• len(s)

• length(s)

• s.length()

• size(s)

Which method converts all characters of a string to uppercase?

• toUpper()

• upper()

• to_upper()

• upcase()

What is the output of "hello".capitalize()?

• HELLO

• hello

• Hello

• Hello World

Which of the following is used to concatenate strings in Python?

• +

• &

• concat()

• append()

What does s[::-1] do?

• Reverses the string s

• Returns the first character of s

• Returns the last character of s

• Rotates the string s

How do you check if a string s contains only digits?

• s.isdigit()

• s.isnumeric()

• s.isalpha()

• s.isalnum()

What is the result of "hello" + "world"?

• hello world

• helloworld

• hello+world

• hello world!

Which of the following checks if a string s starts with a certain substring sub?

• s.startswith(sub)

• s.beginswith(sub)

• s.startswiths(sub)

• s.start(sub)

What does the strip() method do?

• Removes whitespace from the beginning of the string

• Removes whitespace from the end of the string

• Removes whitespace from both the beginning and the end of the string

• Removes all whitespace within the string