Coding-Decoding

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

Sample questions

Sample Easy question 1

If DELHI is coded as EFMIJ (each letter shifted forward by 1), how is MUMBAI coded?

  1. NVNCCJ
  2. NVMCBJ
  3. NVNCBJ
  4. MVNCBJ
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Answer: C. Shifting each letter of MUMBAI forward by 1 gives N,V,N,C,B,J = NVNCBJ.

Sample Easy question 2

If letters are coded in reverse order (A=26, B=25, ..., Z=1), what is the code for 'C'?

  1. 25
  2. 23
  3. 24
  4. 22
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Answer: C. C is the 3rd letter, so its reverse code = 26 - 3 + 1 = 24.

Sample Easy question 3

If TEACHER is coded as UFBDIFS (each letter shifted forward by 1), how is STUDENT coded?

  1. TUVDFOU
  2. TUWEFOU
  3. TUVEFOV
  4. TUVEFOU
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Answer: D. Shifting each letter of STUDENT forward by 1 gives T,U,V,E,F,O,U = TUVEFOU.

Sample Medium question 4

If FRIEND is coded as EQHDMC (each letter shifted back by 1), how is MOTHER coded?

  1. LNRGDQ
  2. LMSGDQ
  3. LNSGDQ
  4. LNSGDR
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Answer: C. Shifting each letter of MOTHER back by 1 gives L,N,S,G,D,Q = LNSGDQ.

Sample Medium question 5

If RIVER is coded as SJWFS (each letter shifted forward by 1), how is OCEAN coded?

  1. PDFBO
  2. PDFCO
  3. PDEBO
  4. PDFBP
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Answer: A. Shifting each letter of OCEAN forward by 1 gives P,D,F,B,O = PDFBO.

Sample Medium question 6

In a certain code, each letter is replaced by its opposite letter in the alphabet (A↔Z, B↔Y, C↔X and so on). How is PLANT written in that code?

  1. LPANH
  2. TNALP
  3. KOZMG
  4. CYNAG
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Answer: C. A↔Z, B↔Y, …: P L A N T → K O Z M G.

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