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Delhi Police Constable Coding-Decoding Questions with Answers & Explanations

20 Coding-Decoding questions from the Reasoning section of Delhi Police Constable, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

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Question 1

If PEN = 35 (sum of letter positions), then DOG = ?

  1. A22
  2. B27
  3. C26
  4. D28
Show answer
Answer: (C) 26 Add the alphabet positions of the letters: 4 + 15 + 7 = 26.
Question 2

In a certain code language, TIGER is written as WLJHU. How is LIGHT written in that code?

  1. APMKLX
  2. BOLJKW
  3. CWKJLO
  4. DROMNZ
Show answer
Answer: (B) OLJKW Each letter is shifted 3 place(s) forward.
Question 3

If FAN = 21 (sum of letter positions), then BOX = ?

  1. A44
  2. B40
  3. C43
  4. D41
Show answer
Answer: (D) 41 Add the alphabet positions of the letters: 2 + 15 + 24 = 41.
Question 4

In a certain code language, FRUIT is written as GSVJU. How is PAPER written in that code?

  1. ARCRGT
  2. BOZODQ
  3. CSFQBQ
  4. DQBQFS
Show answer
Answer: (D) QBQFS Each letter is shifted 1 place(s) forward.
Question 5

If DOG = 26 (sum of letter positions), then HEN = ?

  1. A26
  2. B30
  3. C31
  4. D27
Show answer
Answer: (D) 27 Add the alphabet positions of the letters: 8 + 5 + 14 = 27.
Question 6

In a certain code language, TRAIN is written as VTCKP. How is TABLE written in that code?

  1. AWDEOH
  2. BRYZJC
  3. CVCDNG
  4. DGNDCV
Show answer
Answer: (C) VCDNG Each letter is shifted 2 place(s) forward.
Question 7

If DOG = 26 (sum of letter positions), then BOX = ?

  1. A38
  2. B39
  3. C41
  4. D45
Show answer
Answer: (C) 41 Add the alphabet positions of the letters: 2 + 15 + 24 = 41.
Question 8

In a certain code language, GLASS is written as INCUU. How is SMILE written in that code?

  1. AUOKNG
  2. BGNKOU
  3. CQKGJC
  4. DVPLOH
Show answer
Answer: (A) UOKNG Each letter is shifted 2 place(s) forward.
Question 9

If COW = 41 (sum of letter positions), then TOP = ?

  1. A52
  2. B54
  3. C51
  4. D55
Show answer
Answer: (C) 51 Add the alphabet positions of the letters: 20 + 15 + 16 = 51.
Question 10

In a certain code language, HOUSE is written as JQWUG. How is BRICK written in that code?

  1. AEULFN
  2. BZPGAI
  3. CFVMGO
  4. DDTKEM
Show answer
Answer: (D) DTKEM Each letter is shifted 2 place(s) forward.

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Question 11

If DOG = 26 (sum of letter positions), then PEN = ?

  1. A36
  2. B32
  3. C35
  4. D38
Show answer
Answer: (C) 35 Add the alphabet positions of the letters: 16 + 5 + 14 = 35.
Question 12

In a certain code language, MANGO is written as LZMFN. How is FRUIT written in that code?

  1. AEQTHS
  2. BSHTQE
  3. CDPSGR
  4. DFRUIT
Show answer
Answer: (A) EQTHS Each letter is shifted 1 place(s) backward.
Question 13

If SUN = 54 (sum of letter positions), then FAN = ?

  1. A17
  2. B21
  3. C24
  4. D18
Show answer
Answer: (B) 21 Add the alphabet positions of the letters: 6 + 1 + 14 = 21.
Question 14

In a certain code language, FRUIT is written as DPSGR. How is PAPER written in that code?

  1. ARCRGT
  2. BNYNCP
  3. COZODQ
  4. DLWLAN
Show answer
Answer: (B) NYNCP Each letter is shifted 2 place(s) backward.
Question 15

If CAT = 24 (sum of letter positions), then FAN = ?

  1. A21
  2. B18
  3. C19
  4. D17
Show answer
Answer: (A) 21 Add the alphabet positions of the letters: 6 + 1 + 14 = 21.
Question 16

In a certain code language, FRUIT is written as DPSGR. How is SMILE written in that code?

  1. AOIEHA
  2. BCJGKQ
  3. CRLHKD
  4. DQKGJC
Show answer
Answer: (D) QKGJC Each letter is shifted 2 place(s) backward.
Question 17

If CAT = 24 (sum of letter positions), then TOP = ?

  1. A47
  2. B54
  3. C51
  4. D52
Show answer
Answer: (C) 51 Add the alphabet positions of the letters: 20 + 15 + 16 = 51.
Question 18

If BOX = 41 (sum of letter positions), then DOG = ?

  1. A30
  2. B26
  3. C29
  4. D28
Show answer
Answer: (B) 26 Add the alphabet positions of the letters: 4 + 15 + 7 = 26.
Question 19

In a certain code language, TABLE is written as VCDNG. How is TIGER written in that code?

  1. ATGIKV
  2. BVKIGT
  3. CRGECP
  4. DXMKIV
Show answer
Answer: (B) VKIGT Each letter is shifted 2 place(s) forward.
Question 20

In a certain code language, LIGHT is written as OLJKW. How is TIGER written in that code?

  1. AWLJHU
  2. BQFDBO
  3. CUHJLW
  4. DZOMKX
Show answer
Answer: (A) WLJHU Each letter is shifted 3 place(s) forward.

These are RankerClub practice questions written in the Delhi Police Constable pattern. They are not official SSC/IBPS/RRB papers.

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