Machine-translated by Google. Questions are authored in English.
Top

Coding-Decoding

View Questions of Coding-Decoding

Reasoning - Coding-Decoding

What is Coding-Decoding?

This topic involves converting words or letters into a coded form and decoding them using logical rules. It's used to test your ability to spot letter/number patterns and substitutions.

Types of Coding

1. Letter Coding: Each letter is replaced based on its position or rule (e.g., shift by +1). 2. Number Coding: Words are represented by numbers based on position or sum of values. 3. Substitution Coding: One word or character is replaced by another as per instructions. 4. Symbol Coding: Assigning codes using symbols for letters/numbers.

Example Questions

  • If CAT is coded as DBU, how is DOG coded?
    Answer: EPH (Each letter +1)
  • If TEA = 25, how is BAT coded?
    Answer: 23 (B=2, A=1, T=20 → 2+1+20=23)
  • In a code, BLUE is GREEN, GREEN is RED, RED is YELLOW. What is the color of blood?
    Answer: YELLOW (Blood is RED, but RED=YELLOW in code)

Exam Tips

  • Convert letters to number positions (A=1 to Z=26).
  • Check for consistent rules like +1, −1, reverse, position swap, etc.
  • Practice with both direct and reverse coding.
  • Analyze code patterns in full word, not just initials.

Common Mistakes

  • Assuming random codes without validating the logic.
  • Forgetting to apply the same rule uniformly to all letters.
  • Ignoring position-based shifts or mirror logic (e.g., A↔Z, B↔Y).

Quick Revision Checklist

  • Memorize letter positions and common shifts.
  • Practice sum-based number codings.
  • Solve 20+ problems involving both encoding and decoding.
  • Apply reverse logic if code looks backwards.

Summary: Coding-Decoding tests your ability to detect patterns in transformations. Mastery requires familiarity with letter positions, shift logic, and substitution techniques.

Topics

Other Subjects

About Us

ExamsRepo

Copyright © 2026 ExamsRepo . All Rights Reserved . With