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RRB Group D Coding-Decoding Questions with Answers & Explanations

20 Coding-Decoding questions from the General Intelligence & Reasoning section of RRB Group D, 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 DOG = 26 (sum of letter positions), then CAT = ?

  1. A22
  2. B25
  3. C28
  4. D24
Show answer
Answer: (D) 24 Add the alphabet positions of the letters: 3 + 1 + 20 = 24.
Question 2

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

  1. A38
  2. B39
  3. C42
  4. D44
Show answer
Answer: (C) 42 Add the alphabet positions of the letters: 2 + 21 + 19 = 42.
Question 3

In a certain code language, CLOUD is written as FORXG. How is DUOLC written in that code?

  1. AGXROF
  2. BARLIZ
  3. CFORXG
  4. DHYSPG
Show answer
Answer: (A) GXROF Each letter is shifted 3 place(s) forward.
Question 4

In a certain code language, CLOUD is written as DMPVE. How is BRICK written in that code?

  1. ALDJSC
  2. BCSJDL
  3. CAQHBJ
  4. DDTKEM
Show answer
Answer: (B) CSJDL Each letter is shifted 1 place(s) forward.
Question 5

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

  1. AVCDNG
  2. BSZAKD
  3. CFMCBU
  4. DUBCMF
Show answer
Answer: (D) UBCMF Each letter is shifted 1 place(s) forward.
Question 6

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

  1. A25
  2. B21
  3. C24
  4. D22
Show answer
Answer: (C) 24 Add the alphabet positions of the letters: 3 + 1 + 20 = 24.
Question 7

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

  1. AENQWF
  2. BFWQNE
  3. CGPSYH
  4. DFORXG
Show answer
Answer: (A) ENQWF Each letter is shifted 2 place(s) forward.
Question 8

If CUP = 40 (sum of letter positions), then BAT = ?

  1. A20
  2. B22
  3. C25
  4. D23
Show answer
Answer: (D) 23 Add the alphabet positions of the letters: 2 + 1 + 20 = 23.
Question 9

In a certain code language, GLASS is written as FKZRR. How is CHAIR written in that code?

  1. ADIBJS
  2. BCHAIR
  3. CAFYGP
  4. DBGZHQ
Show answer
Answer: (D) BGZHQ Each letter is shifted 1 place(s) backward.
Question 10

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

  1. A57
  2. B54
  3. C58
  4. D56
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, MONEY is written as PRQHB. How is QUEEN written in that code?

  1. ANRBBK
  2. BQHHXT
  3. CTXHHQ
  4. DUYIIR
Show answer
Answer: (C) TXHHQ Each letter is shifted 3 place(s) forward.
Question 12

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

  1. A30
  2. B29
  3. C33
  4. D27
Show answer
Answer: (A) 30 Add the alphabet positions of the letters: 13 + 1 + 16 = 30.
Question 13

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

  1. ASQZHM
  2. BUSBJO
  3. CVTCKP
  4. DOJBSU
Show answer
Answer: (B) USBJO Each letter is shifted 1 place(s) forward.
Question 14

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

  1. A44
  2. B42
  3. C46
  4. D39
Show answer
Answer: (B) 42 Add the alphabet positions of the letters: 2 + 21 + 19 = 42.
Question 15

In a certain code language, PLANT is written as NJYLR. How is WATER written in that code?

  1. AUYRCP
  2. BVZSDQ
  3. CYCVGT
  4. DPCRYU
Show answer
Answer: (A) UYRCP Each letter is shifted 2 place(s) backward.
Question 16

If BUS = 42 (sum of letter positions), then DOG = ?

  1. A25
  2. B26
  3. C30
  4. D27
Show answer
Answer: (B) 26 Add the alphabet positions of the letters: 4 + 15 + 7 = 26.
Question 17

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

  1. AZPGAI
  2. BAQHBJ
  3. CDTKEM
  4. DXNEYG
Show answer
Answer: (A) ZPGAI Each letter is shifted 2 place(s) backward.
Question 18

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

  1. A26
  2. B25
  3. C28
  4. D27
Show answer
Answer: (A) 26 Add the alphabet positions of the letters: 4 + 15 + 7 = 26.
Question 19

In a certain code language, LIGHT is written as JGEFR. How is PAPER written in that code?

  1. AOZODQ
  2. BRCRGT
  3. CNYNCP
  4. DLWLAN
Show answer
Answer: (C) NYNCP Each letter is shifted 2 place(s) backward.
Question 20

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

  1. ACQSMF
  2. BJQWUG
  3. CGNTRD
  4. DFMSQC
Show answer
Answer: (D) FMSQC Each letter is shifted 2 place(s) backward.

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

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