Coding – Decoding MCQs

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Coding – Decoding

 

Coding-Decoding – Preparation Guide

What is Coding-Decoding? Coding-Decoding is a logical reasoning topic frequently asked in competitive and entrance exams like CUET, SSC, Banking, Railways, and other aptitude-based tests. It tests a student’s ability to understand patterns, relationships, and logic behind words, numbers, or symbols.

Types of Coding-Decoding Questions

  1. Letter Coding Words are coded using certain alphabetical patterns. Example: If CAT is coded as DBU, then DOG is coded as?
  2. Number Coding Words are coded with numbers. Example: If PEN = 35, INK = 34, then what is the code for PAPER?
  3. Symbol Coding Symbols replace words or vice versa. Example: If @ means +, # means -, then solve: 10 # 2 @ 4 = ?
  4. Substitution Coding One thing is substituted with another name. Example: If ‘Red’ means ‘Blue’, ‘Blue’ means ‘Green’, what is the color of the sky?
  5. Mixed Letter Coding Several sentences are coded together to find the meaning of a particular word. Example: Based on given code statements, decode the meaning of certain words.

Tips to Solve Coding-Decoding Questions

Understand the Pattern: Check whether the logic is based on:
  • Alphabet position (A = 1, B = 2…)
  • Reverse alphabet (Z = 1, Y = 2…)
  • Shifting (forward or backward)
  • ASCII values (advanced level)
Break the Word: Split the word into letters and analyze each part. Write Positions of Letters: This helps in quickly spotting the shift in alphabets. Practice Reverse Coding: Be ready to decode from code back to original. Keep Note of Repetition: If a word appears multiple times with different codes, look for patterns. Eliminate Options: In MCQs, often eliminating wrong choices leads you to the right one. Avoid Assumptions: Stick to the logic shown in the question. Never apply general meaning.

Common Mistakes to Avoid

Overthinking – Don’t look for complex patterns if simple logic works. Skipping practice – Coding-Decoding requires regular practice to get comfortable. Ignoring options – Many questions can be solved quickly by testing the given options. Confusing position values – Always double-check your A=1 to Z=26 placement.

Quick Practice Example

If TRUST = UVSUT, then how is FAITH coded?

Solution Tip:

Check if one letter is changing while the rest remain the same.

Final Strategy

Practice different types regularly Time yourself while solving Focus on accuracy over speed initially Prepare short notes of common patterns  
Practice MCQs Online

CUET Exam Preparation

CUET General Test syllabus 

  1. Letter and Symbol Series
  2. Verbal Reasoning
  3. Non-verbal series
  4. Analogies
  5. Coding and Decoding
  6. Judgment and Reasoning
  7. Statement and Conclusion
  8. Statement and Argument
  9. Analytical Reasoning
  10. Blood relations
  11. Direction Test
  12. Mirror and Water Images
  13. Classification

 

Quantitative Aptitude Syllabus

  1. Time and Work
  2. Partnership
  3. Profit and Loss
  4. Boats and Streams
  5. Problems on Trains
  6. Simplification and Approximation
  7. HCF and LCM
  8. Percentages
  9. Ratio and Proportion
  10. Geometry
  11. Mensuration 2D and 3D
  12. Statistics
  13. Application of Mathematics
  14. Probability
  15. Number System
  16. Algebra
  17. Arithmetic Number Series
  18. Arithmetical Reasoning
  19. Data Interpretation
  20. Data Sufficiency
  21. Problem-Solving
  22. Problems on Age
  23. Number Series

 

General Knowledge

  1. Important Days
  2. Indian History
  3. Books and Authors
  4. Indian National Movement
  5. Awards and Honors
  6. General Polity
  7. Countries & Capitals
  8. Science & Technology
  9. Sports
  10. Science – Inventions & Discoveries etc.

 

 

CUET English Syllabus

Reading Comprehension:

There will be three types of passages (maximum 300 words):
  • Factual
  • Narrative
  • Literary

Verbal Ability

  • Rearranging the parts
  • Match the following
  • Choosing the correct word
  • Synonyms and Antonyms

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