GATE CSE 2025 Session 2 Q7: Letter coding: IMAGE → FHBNJ, FIELD → EMFJG, BEACH → ?

If IMAGE and FIELD are coded as FHBNJ and EMFJG respectively then, which one among the given options is the most appropriate code for BEACH?

Try it: multiple choice: exactly one correct option

Wrong answer costs 2/3 mark in GATE.

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Answer: B (official GATE 2025 final answer key)

Concept used: Coding-decoding: a letter shift combined with reversing the word.

First step: Shift each letter of IMAGE by +1 to get JNBHF, then reverse it to FHBNJ; apply the same to BEACH.

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Source: official GATE 2025 Session 2 CS question paper and final answer key, organised by IIT Roorkee. Question paper · Answer key