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 creating a class that can encrypt and decrypt text. It covers defining the class, handling errors, and testing the implementation. The video also includes a hands-on exercise for viewers to create their own Caesar cipher class.

What is the primary function of the Caesar cipher in text encryption?

• To replace each letter with a number

• To replace each letter with a symbol

• To replace each letter with another letter a fixed number of positions down the alphabet

• To replace each letter with a random letter

In the Caesar cipher class demonstration, what is the purpose of the 'print mapping' method?

• To print the encryption key

• To print how each letter is mapped in the encryption

• To print the encrypted text

• To print the original text

What is the role of the 'init' method in the Caesar cipher class?

• To initialize the encryption key and set up the alphabet

• To print the mapping

• To encrypt the text

• To decrypt the text

How is the encrypted alphabet generated in the Caesar cipher class?

• By reversing the original alphabet

• By using slice notation to shift the alphabet

• By randomly shuffling the alphabet

• By converting letters to numbers

What data structure is used to store the mapping of plain text to encrypted text in the Caesar cipher class?

• Set

• List

• Tuple

• Dictionary

How does the Caesar cipher class handle characters that are not defined in the mapping?

• It replaces them with a question mark

• It throws an error

• It converts them to uppercase

• It ignores them

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

• To encrypt the text

• To print the encrypted text

• To change the encryption key

• To convert the encrypted text back to plain text