MCQ Subject: Coding Decoding

A coding system substitutes each letter with another letter three positions ahead of it in the alphabet (wrapping around from Z to A as needed). If ‘PEN’ is coded as ‘RHO’, which word is coded as ‘BCD’?

In a coding system: 1 = A, 2 = B, …, 25 = Y. What is the code for ‘TWO’ if T = 20, W = 23, and O = 15?

A message is encoded as follows: A=1, B=2, …, Z=26. The encoded message reads ’23 15 18 12 4′. Decode the message.

In a coding system, ‘APPLE’ is coded as ‘ZMMQJ’. What would be the code for ‘BANANA’ in this system?

Decode the message ‘ELVIR’ using the given sequence pattern where each letter in ‘HELLO’ is shifted by its position in the alphabet to get ‘ELVIR’. Apply this rule to decode ‘PQRST’ into its original form.

In a coding system, A=8, B=5, C=1, D=3, E=2, F=7, G=6, H=9, I=4, L=1, O=0. What is the code for ‘HELLO’?

What is the code for ‘CODE’ if each letter is replaced by its reverse alphabetical position (A=26, B=25, …, Z=1), with numbers spelled out in words?

In a coded language, ‘APPLE’ is written as ‘ZPPLE’. How would ‘BANANA’ be coded?

In a coding system, ‘APPLE’ is coded as ‘BNQQT’. Which word would be coded as ‘EJQQTW’?

In a coding system where each letter is replaced by the letter three positions ahead of it in the alphabet (with A=1, B=2, …, Z=26, and then wrapping around to the beginning after Z), what would ‘KHOOR’ be decoded as?