Python Quiz

What is the primary purpose of the .replace() method in Python?

• Converting strings to integers

• Replacing a substring in a string with another substring

• Changing the case of a string to lowercase

• Concatenating (adding) two strings

Which of the following is an integer data type in Python?

• "Hello"

• 42.0

• 12345

• [1, 2, 3]

What is the result of the expression "Hello, World!".replace("World", "Python")?

• "Hello, World!"

• "Hello, Python!"

• "Hello, Python, World!"

• "Hello, Python"

What does the .lower() method do to a string in Python?

• Converts it to uppercase

• Converts it to lowercase

• Removes leading and trailing spaces

• Replaces a substring with another substring

What is the result of the expression "12345".replace("3", "6")?

• "12345"

• "12645"

• "654"

• "12"

Which of the following is not a valid integer in Python?

• 42

• 3.14

• -100

• 0

Answer explanation

The number 3.14 is not a valid integer in Python because it contains a decimal point, making it a floating-point number.

What is the result of the expression "aPpLe".lower()?

• "APPLE"

• "Apple"

• "apple"

• "aPpLe"

Which method is used to replace all occurrences of a substring in a string?

• .replace()

• .swapcase()

• .lower()

• .join()

What is the purpose of a while loop in Python?

• To iterate over the elements of a list

• To execute a block of code repeatedly as long as a condition is true

• To define a function in Python

• To perform mathematical calculations

What will happen if the condition of a while loop is never satisfied?

• The loop will run indefinitely

• The loop will terminate (end) immediately

• Python will raise an error

• The loop will skip one iteration