Question

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 ?

Choose one option
Official answer and solution
Official answer
B
From
Official GATE 2025 answer key

Solution

Determine the transformation rule by comparing each word with its reversed letter sequence.

Observe how each word is encoded:

  1. Reverse the letters of IMAGE →\rightarrow E G A M I, then advance each letter by +1+1 in the alphabet (E →\rightarrow F, G →\rightarrow H, A →\rightarrow B, M →\rightarrow N, I →\rightarrow J) to get FHBNJ.
  2. Reverse the letters of FIELD →\rightarrow D L E I F, then advance each letter by +1+1 to get EMFJG.
  3. Applying the same rule to BEACH: reverse to get H C A E B, then advance each letter by +1+1 (H →\rightarrow I, C →\rightarrow D, A →\rightarrow B, E →\rightarrow F, B →\rightarrow C) to obtain IDBFC.
Final answer

Option (B)

Common trap

Forgetting to reverse the word after shifting letters by +1+1.

The answer is the one in the official GATE answer key. The solution is this site's own explanation.

Source

Paper
GATE 2025 Computer Science and Information Technology - Session 2 (CS2)
Question
7 of 65
Section
General Aptitude

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