General Intelligence and ReasoningCoding Decodinghard

Coding Decoding Quiz

Free practice quiz on Coding Decoding Quiz with detailed solutions for government exam preparation.

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About This Quiz

Coding Decoding Quiz is a free, 25-minute, 25-mark practice quiz on AajExam rated at hard difficulty, designed to help candidates preparing for SSC, UPSC, Banking, Railway and State PSC government competitive exams sharpen their command of Coding Decoding (General Intelligence and Reasoning). Every question on this quiz ships with a detailed step-by-step solution so you don't just learn the right answer — you learn the reasoning and shortcuts top scorers use to crack similar questions faster on the actual exam day. Why Coding Decoding Quiz matters in your preparation: government exam-conducting bodies repeatedly draw questions from the same chapters and the same skill-clusters across recruitment cycles. By attempting focused topic-wise quizzes like this one, you build pattern recognition — the ability to spot which formula, rule or trick applies the moment you see a question. Toppers consistently report that 5-10 quizzes on a single topic delivers more exam-day score gain than 20+ unfocused full-length mocks, because targeted drilling exposes your specific sub-topic weaknesses with surgical precision. How to use this quiz effectively: attempt it in one sitting under the 25-minute timer, without referring to notes or external resources — simulate exam-day conditions exactly. After submission, review the auto-generated analytics to see your accuracy, time per question and section-wise performance. Then go through every wrong and skipped question with the explanation, mentally tagging the underlying concept rather than just memorising the answer. Revisit this quiz after 7-10 days; your second attempt should be 15-20% faster with noticeably better accuracy. Bookmark this page and revisit weekly as we add new quizzes on related topics. AajExam quiz design principles: every quiz on the platform is curated by subject experts using the actual question formats, difficulty distributions and time pressures of the target government exams. We deliberately avoid generic "textbook" questions in favour of exam-replicating ones. Solutions are written in plain English (and Hindi where source material was bilingual), with step-by-step working for quantitative problems, grammar rules for English questions, and direct reference statements for general awareness items. Performance analytics after each attempt include accuracy, attempt rate, time spent per question, and an estimated all-India percentile so you know exactly where you stand against other candidates. This quiz is completely free to attempt. You only need a free AajExam account to track your performance across attempts, view detailed solutions and unlock the platform-wide analytics dashboard. The platform is mobile-friendly and works seamlessly on smartphones, tablets and desktops — so you can sharpen your Coding Decoding (General Intelligence and Reasoning) skills in any spare 15-minute window.

Coding Decoding Quiz — Questions with Solutions

All 25 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.

  1. Q1.If in a code, 'CAT' is written as 'DBU' (each letter +1), how is 'DOG' written?

    • A.EPH
    • B.EPI
    • C.FPH
    • D.EOH
    Show answer

    Answer: A. EPH

    Each letter shifts forward by one: D->E, O->P, G->H.

  2. Q2.If 'FLOWER' is coded as 'GMPXFS' (each letter +1), how is 'GARDEN' coded?

    • A.HBSEFO
    • B.HBSEFP
    • C.HBSEFN
    • D.GBSEFO
    Show answer

    Answer: A. HBSEFO

    Each letter shifts forward by one: G->H, A->B, R->S, D->E, E->F, N->O.

  3. Q3.If A=1, B=2, ..., Z=26, what is the numeric code for 'CAB'?

    • A.3-1-2
    • B.1-2-3
    • C.2-1-3
    • D.3-2-1
    Show answer

    Answer: A. 3-1-2

    C=3, A=1, B=2, matching each letter's position.

  4. Q4.In a certain code, 'RAIN' is written as '25-1-9-14' (position in alphabet reversed for R). Actually, if position values are used directly (R=18,A=1,I=9,N=14), how is 'RAIN' coded?

    • A.18-1-9-14
    • B.18-1-9-4
    • C.8-1-9-14
    • D.18-11-9-14
    Show answer

    Answer: A. 18-1-9-14

    Using direct alphabet positions: R=18, A=1, I=9, N=14.

  5. Q5.If 'PEN' is coded as 'QFO' (each letter +1), how is 'BOOK' coded?

    • A.CPPL
    • B.CPOL
    • C.BPPL
    • D.CPPK
    Show answer

    Answer: A. CPPL

    Each letter shifts forward by one: B->C, O->P, O->P, K->L.

  6. Q6.If 'MANGO' is coded as 'NBOHP' (each letter +1), how is 'APPLE' coded?

    • A.BQQMF
    • B.BQQMG
    • C.AQQMF
    • D.BPQMF
    Show answer

    Answer: A. BQQMF

    Each letter shifts forward by one: A->B, P->Q, P->Q, L->M, E->F.

  7. Q7.If in a code language, 'SUN' is written as 'TVO' (each letter +1), how is 'MOON' written?

    • A.NPPO
    • B.NPPN
    • C.MPPO
    • D.NOPO
    Show answer

    Answer: A. NPPO

    Each letter shifts forward by one: M->N, O->P, O->P, N->O.

  8. Q8.If 'BOOK' is coded as 'ANNJ' (each letter -1), how is 'PAGE' coded?

    • A.OZFD
    • B.OZFE
    • C.PZFD
    • D.OZGD
    Show answer

    Answer: A. OZFD

    Each letter shifts backward by one: P->O, A->Z, G->F, E->D.

  9. Q9.If 'TIGER' is coded as 'UJHFS' (each letter +1), how is 'LION' coded?

    • A.MJPO
    • B.MJPN
    • C.LJPO
    • D.MIPO
    Show answer

    Answer: A. MJPO

    Each letter shifts forward by one: L->M, I->J, O->P, N->O.

  10. Q10.In a certain code, 1=A, 2=B, 3=C. What word does 3-1-20 represent?

    • A.CAT
    • B.BAT
    • C.CAB
    • D.BAG
    Show answer

    Answer: A. CAT

    3=C, 1=A, 20=T, forming 'CAT'.

  11. Q11.If 'RIVER' is coded as 'SJWFS' (each letter +1), how is 'OCEAN' coded?

    • A.PDFBO
    • B.PDFBP
    • C.ODFBO
    • D.PDFAO
    Show answer

    Answer: A. PDFBO

    Each letter shifts forward by one: O->P, C->D, E->F, A->B, N->O.

  12. Q12.If in a code, 'DELHI' is written as 'EFMIJ' (each letter +1), how is 'AGRA' coded?

    • A.BHSB
    • B.BHSА
    • C.AHSB
    • D.BGSB
    Show answer

    Answer: A. BHSB

    Each letter shifts forward by one: A->B, G->H, R->S, A->B.

  13. Q13.If 'HORSE' is coded as 'GNQRD' (each letter -1), how is 'CAMEL' coded?

    • A.BZLDK
    • B.BZLDJ
    • C.CZLDK
    • D.BZKDK
    Show answer

    Answer: A. BZLDK

    Each letter shifts backward by one: C->B, A->Z, M->L, E->D, L->K.

  14. Q14.If '5' represents 'A', '10' represents 'B', and so on in multiples of 5, what number represents 'C'?

    • A.10
    • B.15
    • C.20
    • D.25
    Show answer

    Answer: B. 15

    Following the pattern (multiples of 5): A=5, B=10, C=15.

  15. Q15.If 'SCHOOL' is coded as 'TDIPPM' (each letter +1), how is 'TEACHER' coded?

    • A.UFBDIFS
    • B.UFBDIES
    • C.TFBDIFS
    • D.UEBDIFS
    Show answer

    Answer: A. UFBDIFS

    Each letter shifts forward by one: T->U, E->F, A->B, C->D, H->I, E->F, R->S.

  16. Q16.If 'WATER' is coded as 'XBUFS' (each letter +1), how is 'EARTH' coded?

    • A.FBSUI
    • B.FBSUH
    • C.EBSUI
    • D.FASUI
    Show answer

    Answer: A. FBSUI

    Each letter shifts forward by one: E->F, A->B, R->S, T->U, H->I.

  17. Q17.In a code, if 'GOOD' is written as '7-15-15-4' using alphabet positions, how is 'BAD' written?

    • A.2-1-4
    • B.2-1-3
    • C.1-2-4
    • D.2-2-4
    Show answer

    Answer: A. 2-1-4

    B=2, A=1, D=4, based on alphabet positions.

  18. Q18.If 'NIGHT' is coded as 'OJHIU' (each letter +1), how is 'LIGHT' coded?

    • A.MJHIU
    • B.MJHIV
    • C.LJHIU
    • D.MIHIU
    Show answer

    Answer: A. MJHIU

    Each letter shifts forward by one: L->M, I->J, G->H, H->I, T->U.

  19. Q19.If in a code, 'A' is coded as 'Z', 'B' as 'Y' (reverse alphabet), how is 'CAT' coded?

    • A.XZG
    • B.ZYG
    • C.XYG
    • D.XZH
    Show answer

    Answer: A. XZG

    Reverse mapping: C->X, A->Z, T->G.

  20. Q20.If '2' stands for 'B' and '20' stands for 'T', following alphabet position, what does '1' stand for?

    • A.A
    • B.Z
    • C.B
    • D.C
    Show answer

    Answer: A. A

    Using direct alphabet positions, 1 corresponds to 'A'.

  21. Q21.If 'FISH' is coded as 'GJTI' (each letter +1), how is 'BIRD' coded?

    • A.CJSE
    • B.CJSD
    • C.BJSE
    • D.CISE
    Show answer

    Answer: A. CJSE

    Each letter shifts forward by one: B->C, I->J, R->S, D->E.

  22. Q22.If 'PENCIL' is coded as 'QFODJM' (each letter +1), how is 'ERASER' coded?

    • A.FSBTFS
    • B.FSBTFR
    • C.ESBTFS
    • D.FRBTFS
    Show answer

    Answer: A. FSBTFS

    Each letter shifts forward by one: E->F, R->S, A->B, S->T, E->F, R->S.

  23. Q23.If 'X' represents 5, 'Y' represents 10, and 'Z' represents 15 (multiples of 5), what does 'W' represent?

    • A.0
    • B.5
    • C.20
    • D.25
    Show answer

    Answer: C. 20

    Following the reverse alphabet pattern with multiples of 5 (Z=15,Y=10,X=5), W would be 20.

  24. Q24.If 'KITE' is coded as 'LJUF' (each letter +1), how is 'GATE' coded?

    • A.HBUF
    • B.HBUE
    • C.GBUF
    • D.HAUF
    Show answer

    Answer: A. HBUF

    Each letter shifts forward by one: G->H, A->B, T->U, E->F.

  25. Q25.If 'MUSIC' is coded as 'NVTJD' (each letter +1), how is 'DANCE' coded?

    • A.EBODF
    • B.EBODE
    • C.DBODF
    • D.EAODF
    Show answer

    Answer: A. EBODF

    Each letter shifts forward by one: D->E, A->B, N->O, C->D, E->F.

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Frequently Asked Questions

Is Coding Decoding Quiz free to attempt on AajExam?

Yes. Coding Decoding Quiz is completely free. You only need a free AajExam account to track your score, view detailed solutions and unlock cross-attempt analytics.

How long does it take to complete Coding Decoding Quiz?

Coding Decoding Quiz runs on a 25-minute timer in real exam-style conditions. The clock starts the moment you click Start, mirroring the time pressure of the actual exam.

Are detailed solutions provided?

Yes. Every question on Coding Decoding Quiz ships with a complete step-by-step solution, the underlying concept, and (where applicable) shortcut tricks. You can also discuss any question with the AajExam community.

Can I attempt Coding Decoding Quiz multiple times?

Yes. You can attempt this quiz as many times as you like. Each attempt is recorded separately so you can track improvement in score, accuracy and time-management.

Which government exams does this quiz prepare me for?

Coding Decoding questions appear regularly in SSC CGL, CHSL, MTS, GD; IBPS PO, Clerk; SBI PO, Clerk; RRB NTPC, Group D; UPSC prelims and most State PSC exams. The specific weightage varies by exam — check the exam pattern on the corresponding AajExam exam page for details.