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SSC GD Constable Coding-Decoding Questions with Answers & Explanations

20 Coding-Decoding questions from the General Intelligence & Reasoning section of SSC GD 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

In a certain code language, MANGO is written as OCPIQ. How is HOUSE written in that code?

  1. AGUWQJ
  2. BFMSQC
  3. CLSYWI
  4. DJQWUG
Show answer
Answer: (D) JQWUG Each letter is shifted 2 place(s) forward.
Question 2

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

  1. A45
  2. B41
  3. C42
  4. D40
Show answer
Answer: (C) 42 Add the alphabet positions of the letters: 2 + 21 + 19 = 42.
Question 3

In a certain code language, MANGO is written as KYLEM. How is BREAD written in that code?

  1. ABYCPZ
  2. BAQDZC
  3. CZPCYB
  4. DXNAWZ
Show answer
Answer: (C) ZPCYB Each letter is shifted 2 place(s) backward.
Question 4

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

  1. A18
  2. B17
  3. C21
  4. D22
Show answer
Answer: (C) 21 Add the alphabet positions of the letters: 6 + 1 + 14 = 21.
Question 5

In a certain code language, BREAD is written as ZPCYB. How is BRICK written in that code?

  1. AAQHBJ
  2. BXNEYG
  3. CIAGPZ
  4. DZPGAI
Show answer
Answer: (D) ZPGAI Each letter is shifted 2 place(s) backward.
Question 6

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

  1. A37
  2. B35
  3. C33
  4. D31
Show answer
Answer: (B) 35 Add the alphabet positions of the letters: 16 + 5 + 14 = 35.
Question 7

In a certain code language, CLOUD is written as BKNTC. How is PLANT written in that code?

  1. ASMZKO
  2. BPLANT
  3. COKZMS
  4. DNJYLR
Show answer
Answer: (C) OKZMS Each letter is shifted 1 place(s) backward.
Question 8

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

  1. A26
  2. B24
  3. C28
  4. D22
Show answer
Answer: (A) 26 Add the alphabet positions of the letters: 4 + 15 + 7 = 26.
Question 9

In a certain code language, WATER is written as YCVGT. How is RETAW written in that code?

  1. AYCVGT
  2. BTGVCY
  3. CPCRYU
  4. DUHWDZ
Show answer
Answer: (B) TGVCY Each letter is shifted 2 place(s) forward.
Question 10

If HEN = 27 (sum of letter positions), then SUN = ?

  1. A55
  2. B54
  3. C58
  4. D53
Show answer
Answer: (B) 54 Add the alphabet positions of the letters: 19 + 21 + 14 = 54.

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Question 11

In a certain code language, BREAD is written as ZPCYB. How is DAERB written in that code?

  1. AZPCYB
  2. BFCGTD
  3. CCZDQA
  4. DBYCPZ
Show answer
Answer: (D) BYCPZ Each letter is shifted 2 place(s) backward.
Question 12

In a certain code language, MONEY is written as OQPGA. How is BREAD written in that code?

  1. AFCGTD
  2. BEUHDG
  3. CZPCYB
  4. DDTGCF
Show answer
Answer: (D) DTGCF Each letter is shifted 2 place(s) forward.
Question 13

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

  1. A28
  2. B26
  3. C24
  4. D23
Show answer
Answer: (B) 26 Add the alphabet positions of the letters: 4 + 15 + 7 = 26.
Question 14

In a certain code language, SMILE is written as QKGJC. How is TRAIN written in that code?

  1. ARPYGL
  2. BVTCKP
  3. CSQZHM
  4. DPNWEJ
Show answer
Answer: (A) RPYGL Each letter is shifted 2 place(s) backward.
Question 15

If MAP = 30 (sum of letter positions), then BOX = ?

  1. A38
  2. B40
  3. C41
  4. D45
Show answer
Answer: (C) 41 Add the alphabet positions of the letters: 2 + 15 + 24 = 41.
Question 16

In a certain code language, CLOUD is written as ENQWF. How is QUEEN written in that code?

  1. ASWGGP
  2. BOSCCL
  3. CTXHHQ
  4. DUYIIR
Show answer
Answer: (A) SWGGP Each letter is shifted 2 place(s) forward.
Question 17

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

  1. A54
  2. B52
  3. C51
  4. D58
Show answer
Answer: (A) 54 Add the alphabet positions of the letters: 19 + 21 + 14 = 54.
Question 18

If HEN = 27 (sum of letter positions), then COW = ?

  1. A41
  2. B39
  3. C44
  4. D45
Show answer
Answer: (A) 41 Add the alphabet positions of the letters: 3 + 15 + 23 = 41.
Question 19

In a certain code language, PAPER is written as QBQFS. How is TABLE written in that code?

  1. AFMCBU
  2. BSZAKD
  3. CUBCMF
  4. DVCDNG
Show answer
Answer: (C) UBCMF Each letter is shifted 1 place(s) forward.
Question 20

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

  1. A25
  2. B27
  3. C28
  4. D26
Show answer
Answer: (B) 27 Add the alphabet positions of the letters: 8 + 5 + 14 = 27.

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

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