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Coding Decoding is a type of Logical Reasoning question where words or letters are coded in a specific pattern and you need to decode them. For example if CAT is coded as FDW then each letter is shifted by 3 positions. It is one of the most important topics in SSC CGL, Bank PO, IBPS, and Railway competitive exams.

Types of Coding Decoding questions: Letter Coding (letters replaced by other letters), Number Coding (words coded as numbers), Symbol Coding (letters replaced by symbols), Mixed Coding (combination of numbers and letters), and Coding by Analogy. All these types are asked in SSC CGL, RRB NTPC, and Bank exams.

Tips to solve Coding Decoding quickly: Look for the pattern (forward/backward shift, opposite letter, mirror image), Check if it is based on position (A=1, B=2), Look for consistent operations like +3 or -2, Practice letter positions (A=1 to Z=26), Check if alternate letters or reversed alphabet is used. Regular practice increases speed.

Common coding patterns in SSC CGL: Alphabetical shift (CAT coded as FDW means +3 shift), Reverse alphabet (A=Z, B=Y), Position-based coding (A=1, Z=26), Word rearrangement coding, and Number substitution. Understanding these patterns and practicing with previous year papers helps crack Coding Decoding questions in SSC exams.

Coding refers to converting information using a specific pattern or rule. Decoding is the reverse process of finding the original message from the coded form. In competitive exams both skills are tested together. If you know the coding rule like each letter shifted forward by 2 you can easily decode any message using the same rule in reverse.