🎯 RankerClub is 100% Free — 97 full-length mock tests with an instant all-India rank. Register Free →
RankerClub
Log in Get Started Free
Log in Register Free

RRB ALP Coding-Decoding Questions with Answers & Explanations

20 Coding-Decoding questions from the Mental Ability & Reasoning section of RRB ALP, 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.

Take the Mental Ability & Reasoning test → RRB ALP full mocks
Question 1

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

  1. ATGRCR
  2. BQDOZO
  3. CSFQBQ
  4. DQBQFS
Show answer
Answer: (C) SFQBQ Each letter is shifted 1 place(s) forward.
Question 2

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

  1. A30
  2. B34
  3. C32
  4. D33
Show answer
Answer: (A) 30 Add the alphabet positions of the letters: 13 + 1 + 16 = 30.
Question 3

In a certain code language, WATER is written as VZSDQ. How is TRAIN written in that code?

  1. ARPYGL
  2. BSQZHM
  3. CTRAIN
  4. DMHZQS
Show answer
Answer: (B) SQZHM Each letter is shifted 1 place(s) backward.
Question 4

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

  1. A27
  2. B33
  3. C30
  4. D29
Show answer
Answer: (C) 30 Add the alphabet positions of the letters: 13 + 1 + 16 = 30.
Question 5

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

  1. AFVIEH
  2. BEUHDG
  3. CGDHUE
  4. DHXKGJ
Show answer
Answer: (B) EUHDG Each letter is shifted 3 place(s) forward.
Question 6

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

  1. A38
  2. B40
  3. C42
  4. D45
Show answer
Answer: (C) 42 Add the alphabet positions of the letters: 2 + 21 + 19 = 42.
Question 7

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

  1. APNWEJ
  2. BLGYPR
  3. CVTCKP
  4. DRPYGL
Show answer
Answer: (D) RPYGL Each letter is shifted 2 place(s) backward.
Question 8

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

  1. A44
  2. B39
  3. C40
  4. D42
Show answer
Answer: (D) 42 Add the alphabet positions of the letters: 2 + 21 + 19 = 42.
Question 9

In a certain code language, QUEEN is written as RVFFO. How is PLANT written in that code?

  1. ARNCPV
  2. BOKZMS
  3. CQMBOU
  4. DUOBMQ
Show answer
Answer: (C) QMBOU Each letter is shifted 1 place(s) forward.
Question 10

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

  1. A42
  2. B37
  3. C44
  4. D41
Show answer
Answer: (D) 41 Add the alphabet positions of the letters: 3 + 15 + 23 = 41.

Ready for the real thing?
Timed Mental Ability & Reasoning test · 25 questions · instant rank

Start free test
Question 11

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

  1. ATGVCY
  2. BNAPWS
  3. CQDSZV
  4. DPCRYU
Show answer
Answer: (D) PCRYU Each letter is shifted 2 place(s) backward.
Question 12

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

  1. A22
  2. B23
  3. C21
  4. D19
Show answer
Answer: (C) 21 Add the alphabet positions of the letters: 6 + 1 + 14 = 21.
Question 13

In a certain code language, WATER is written as ZDWHU. How is HOUSE written in that code?

  1. ALSYWI
  2. BHVXRK
  3. CKRXVH
  4. DELRPB
Show answer
Answer: (C) KRXVH Each letter is shifted 3 place(s) forward.
Question 14

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

  1. A41
  2. B46
  3. C43
  4. D42
Show answer
Answer: (D) 42 Add the alphabet positions of the letters: 2 + 21 + 19 = 42.
Question 15

In a certain code language, SMILE is written as VPLOH. How is HOUSE written in that code?

  1. AHVXRK
  2. BKRXVH
  3. CELRPB
  4. DNUAYK
Show answer
Answer: (B) KRXVH Each letter is shifted 3 place(s) forward.
Question 16

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

  1. A42
  2. B41
  3. C39
  4. D46
Show answer
Answer: (A) 42 Add the alphabet positions of the letters: 2 + 21 + 19 = 42.
Question 17

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

  1. ATKXGT
  2. BTGXKT
  3. CPGTCP
  4. DVMZIV
Show answer
Answer: (A) TKXGT Each letter is shifted 2 place(s) forward.
Question 18

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

  1. A36
  2. B32
  3. C39
  4. D35
Show answer
Answer: (D) 35 Add the alphabet positions of the letters: 16 + 5 + 14 = 35.
Question 19

If BAT = 23 (sum of letter positions), then TOP = ?

  1. A51
  2. B49
  3. C55
  4. D48
Show answer
Answer: (A) 51 Add the alphabet positions of the letters: 20 + 15 + 16 = 51.
Question 20

In a certain code language, STONE is written as VWRQH. How is PAPER written in that code?

  1. AVGVKX
  2. BMXMBO
  3. CSDSHU
  4. DTETIV
Show answer
Answer: (C) SDSHU Each letter is shifted 3 place(s) forward.

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

More Mental Ability & Reasoning topics

Alphabet & Word Order 25 Qs Order & Ranking 23 Qs Analogy 23 Qs Series 21 Qs Calendar 20 Qs Syllogism 19 Qs Blood Relations 19 Qs Clocks 19 Qs

All RRB ALP topics →