Python - Object-Oriented Programming - Assignment 4

The video tutorial explains the Caesar cipher, a text encryption method where each letter in the plaintext is replaced by a letter a fixed number of positions down the alphabet. The tutorial demonstrates how to implement this cipher in Python by defining a class with methods for encryption and decryption. It covers creating a mapping dictionary, handling errors, and testing the class functionality. The video also encourages viewers to try implementing the cipher themselves.

What is the primary function of the Caesar cipher?

• To replace each letter with a number

• To shift each letter by a fixed number of positions in the alphabet

• To convert text into binary code

• To reverse the order of letters in a word

In the Caesar cipher, if the key is 3, which letter does 'D' get replaced with?

• G

• A

• C

• Z

What is required to create an instance of the Caesar cipher class?

• A key for encryption

• A decryption method

• A text to encrypt

• A list of alphabets

What does the print mapping method in the Caesar cipher class do?

• Decrypts the text

• Encrypts the text

• Prints the original text

• Displays the mapping of letters

How does the Caesar cipher class handle spaces in the text?

• It throws an error

• It converts them to a special character

• It ignores them

• It replaces them with underscores

What is the purpose of the decrypt method in the Caesar cipher class?

• To handle errors in encryption

• To convert encrypted text back to plain text

• To print the mapping of letters

• To encrypt the text

What is the role of the reverse mapping in the decrypt method?

• To encrypt the text

• To map plain text to encrypted text

• To map encrypted text back to plain text

• To handle spaces in the text