Preparing for the RRB Group D 2025 exam requires a strong command of Reasoning, especially the Coding Decoding section which often plays a crucial role in boosting overall scores.

To help you practice effectively we have compiled a set of high quality Coding Decoding Mock Test Questions and Answers designed according to the latest RRB exam pattern.

These questions will improve your logical thinking pattern recognition and problem solving speed essential skills for clearing the Group D exam confidently Let’s begin your practice with the most important reasoning questions.

 

RRB Group D 2025 Reasoning Coding Decoding Mock Test Questions and Answers

1. If TERMINAL is written as SDQLJOBM in a code language, how would CREDIBLE be written in that code language?

(1) BQDCJCMF
(2) DSFEJCMF
(3) BQDCHAKD
(4) DSFEIIAKD

2. In a certain code, LABOUR is written as KBAPTS. How would CANDID be written in that code language?

(1) DBOEJE
(2) DZDCJC
(3) BBMCHC
(4) BBMEHE

3. In a certain code, CONSUMER is written as ERUMNSCO. How would TRIANGLE be written in that code language?

(1) LENG1ATR
(2) EENGIATR
(3) LEGNIATR
(4) LEGNAJTR

4. In a certain code language, BREAKDOWN is written as NWODKAERB. How would TRIANGLES be written in that code language?

(1) AIRTGNSEL
(2) SELGWTRIA
(3) AIRTNSELG
(4) SELGNAIRT

5. In a certain code language, CROWD is written as DQPVE. How would BLEND be written in that code language?

(1) CMFOE
(2) CKFME
(3) AKDMC
(4) AMD0C

6. In a certain code language, BREAK is written as 51342 and KITE is written as 2796. How would RIB be written in that code language?

(1) 175
(2) 176
(3) 185
(4) 135

7. In a certain sign language, ROAMING is written as APRNGOI. How would PLATEAU be written in that same sign language?

(1) AMPTUBE
(2) PMAUEBU
(3) ALPUUAE
(4) AMPUUBE

8. In a certain sign language, SPRING is written as #2%@4= and GONE is written as =74©. How would SIGN be written in that same sign language?

(1) #@4=
(2) 2@=4
(3) #@=4
(4) #%=4

9. In a certain code language, TEMPORARY is written as SFLQOQBQZ. How would WONDERFUL be written in the same code language?

(1) VPMEFQGTM
(2) VPMEESGTM
(3) XPMEEQGTM
(4) None of these

10. In a certain code, BROWN is written as 531%@% and MEAN is written as 26©%. How would ROBE be written in that code?

(1) 3@16
(2) 3516
(3) 3156
(4) 3©16

11. In a certain code, ORBITAL is written as CSPHMBU. How would CHARGER be written in that code?

(1) BIDQSFH
(2) BIDSSFH
(3) BIDQQDF
(4) DIBQSFH

12. In a certain code language, “the tree is very beautiful” is written as ‘ka na da ta’ and “this is strong tree” is written as ‘na pa sa ka’. How would BEAUTIFUL be written in this code?

(1) da
(2) ta
(3) sa
(4) Data inadequate

13. In a certain code language, GIVE is written as ’51 @©’ and FAIL is written as %219. How would LEAF be written in this code?

(1) 5©2%
(2) 9©2%
(3) 9@2%
(4) 9©1%

14. In a certain code, SUBSTANCE is written as RATRUFDOB. How is TENTHOUSE written in that code?

(1) SMDSIFTVP
(2) UOFUIDRTN
(3) UOFUIFTVP
(4) SMDSIDRTN

15. In a certain code, FIGHT is written as 39%@4 and TEARS is written as 458©H. How is STAGE written in that code?

(1) ´4835
(2) ´48%5
(3) ´84%5
(4) ´48@5

16. In a certain code, BROADEN is written as NQABOFE. How is DESKTOP written in that code?

(1) RDCLQPU
(2) TFELQPU
(3) RDCJQPU
(4) EFTLONS

17. In a certain code, JOINTLY is written as IPHOSMX. How would SERMON be written in that code?

(1) RFQNNO
(2) TFSNPO
(3) TDQLNM
(4) RFQNMP

18. In a certain code, AUTOMATIC is written as PUVBMBUJD. How would BUILDING be written in that code?

(1) MJVCDJOHT
(2) CVJMDJOHT
(3) MKVCDTHOJ
(4) CVJMDTHOJ

19. In a certain sign language, FAIR is written as ‘´÷$#’. How would DEAF be written in the same sign language?

(1) @l$´
(2) @l÷´
(3) ©#÷´
(4) H@l÷

20. In a certain sign language, ORIENTAL is written as MBUOFJSP. How would COWARDLY be written in the same sign language?

(1) ZMESDPXB
(2) XKCQBXPD
(3) ZMESDXBP
(4) ZMESBXPD

21. In a certain sign language, POETRY is written as QONDSQX and OVER is written as PNUDQ. How would MORE be written in that sign language?

(1) NNNQD
(2) NLPQD
(3) NLNQD
(4) None of these

22. In a certain sign language, MOTHERS is written as OMVGGPU. How would BROUGHT be written in that sign language?

(1) CPRTIEV
(2) DPQSIFV
(3) DPRTIDV
(4) DPQTIFV

23. If 6 is coded as T, 8 as I, 3 as N, 9 as Q, 2 as V, 5 as D, and 7 as R, what should be the coded form of DRINTQ?

(1) 573869
(2) 578396
(3) 576839
(4) None of these

24. In a certain code language, “si po re” means “book is thick” and “ti na re” means “bag is heavy.” Which of the following means “that is interesting” in that code language?

(1) ka re na
(2) de si re
(3) ti po ka
(4) ka de re

RRB Group D 2025 Reasoning Coding Decoding  Mock Test Questions Answers

1. Ans. A

2. Ans. D

3. Ans. A

4. Ans. D

5. Ans. B

6. Ans. A

7. Ans. D

8. Ans. A

9. Ans. D

10. Ans. C

11. Ans. A

12. Ans. D

13. Ans. B

14. Ans. A

15. Ans. B

16. Ans. B

17. Ans. A

18. Ans. A

19. Ans. B

20. Ans. D

21. Ans. D

22. Ans. D

23. Ans. D

24. Ans. D

Conclusion

The RRB Group D 2025 Reasoning Coding Decoding Mock Test provided above is designed to strengthen your analytical skills and boost exam readiness Regular practice of these questions helps you understand hidden patterns improve accuracy and increase problem solving speed all essential for scoring well in the RRB Group D exam.