What will be the output of the following Python code?

'{a}{b}{a}'.format(a='hello', b='world')

Which function is used to format strings in Python?

A. format()

B. stringify()

C. format_string()

D. str_format()

In Python, what does the % operator do when used for string formatting?

A. Substitutes variables

B. Raises an error

C. Performs division

D. Calculates exponentiation

Which of the following is an f-string in Python?

A. f"Hello {name}"

B. "Hello {}".format(name)"

C. "Hello %s" % name

D. format("Hello {}", name)

What will be the output of the following Python expression if x=22.19?

print("%5.2f"%x)

A. 22.1900

B. 22.00000

C. 22.19

D. 22.20