Coding-Decoding

Ladakh Prison Department · Reasoning · 81 practice questions with answers and explanations: 48 Easy, 33 Medium, 0 Hard.

Sample questions

Sample Easy question 1

If PAPER is coded as RCRGT in a certain code, how is RAIN coded in the same code?

  1. TCKP
  2. UDLQ
  3. PYGL
  4. SBJO
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Answer: A. The shift is 2: PAPER → RCRGT, so RAIN → TCKP.

Sample Easy question 2

In a certain code, each letter is replaced by the letter 1 place ahead of it in the alphabet. How is PAPER written in that code?

  1. RCRGT
  2. PAPER
  3. OZODQ
  4. QBQFS
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Answer: D. Move each letter 1 step(s) forward: P A P E R → Q B Q F S.

Sample Easy question 3

In a certain code, each letter is replaced by the letter 5 places ahead of it. If a word is coded as STYJ, what was the original word?

  1. XYDO
  2. OPUF
  3. NOTE
  4. MNSD
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Answer: C. Move each letter 5 step(s) back: STYJ → NOTE.

Sample Medium question 4

In a certain code, each letter is replaced by the letter 2 places ahead of it. If a word is coded as RGP, what was the original word?

  1. TIR
  2. QFO
  3. PEN
  4. ODM
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Answer: C. Move each letter 2 step(s) back: RGP → PEN.

Sample Medium question 5

If CAT is coded as DBU in a certain code, how is FISH coded in the same code?

  1. FISH
  2. GJTI
  3. HKUJ
  4. EHRG
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Answer: B. The shift is 1: CAT → DBU, so FISH → GJTI.

Sample Medium question 6

In a certain code, each letter is replaced by the letter 4 places before it in the alphabet. How is DOG written in that code?

  1. ZKC
  2. ALD
  3. YJB
  4. HSK
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Answer: A. Move each letter 4 step(s) backward: DOG → ZKC.

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