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Reasoning practice

Coding and Decoding Questions with Answers

Letter, number and symbol codes, including the layered codes that need two rules applied in order. This page pools every coding and decoding question on the site (323 of them, from 48 exams, weighted towards Banking, Railways, SSC) so you can drill the topic on its own instead of meeting four of them inside a full paper.

20% of the pool is graded hard on this site’s own scale and 7% easy, which is about average for this section.

Questions
323
Practice set
25 in 25 min
Difficulty
24/235/64
Negative marking
None
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Coding and Decoding questions with solutions

6 from the 323-question pool, worked in full.

  1. 1. If PEARL is coded as QFBSM (each letter moved one step forward in the alphabet), how would CORAL be coded using the same rule?

    • A. DPSBM ✓
    • B. CPSBM
    • C. DPSAM
    • D. DQSBM

    Solution. Shifting each letter of CORAL forward by one: C→D, O→P, R→S, A→B, L→M, giving DPSBM.

  2. 2. If "7" means "irrigate", "3" means "the", "9" means "field", and "5" means "farmer", how would "the farmer irrigate the field" be coded, using these same digit-word pairs?

    • A. 3 5 7 3 9 ✓
    • B. 7 5 3 9 3
    • C. 3 9 7 5 3
    • D. 5 3 7 9 3

    Solution. Substituting each word with its digit code in the given sentence order: "the"=3, "farmer"=5, "irrigate"=7, "the"=3, "field"=9, giving 3 5 7 3 9.

  3. 3. If in a code WATER is written as XBUFS (each letter shifted one place forward), how is STONE coded?

    • A. TUPOG
    • B. TUOPF
    • C. SUPOF
    • D. TUPOF ✓

    Solution. Shifting each letter forward by one place: S→T, T→U, O→P, N→O, E→F, giving TUPOF.

  4. 4. If in a certain code, "WATER" is written as "23-1-20-5-18", what is the code for "FIELD"?

    • A. 6-9-5-12-4 ✓
    • B. 6-9-4-12-5
    • C. 5-9-5-12-4
    • D. 6-8-5-12-4

    Solution. Each letter is coded by its position in the alphabet: F=6, I=9, E=5, L=12, D=4, giving 6-9-5-12-4.

  5. 5. If in a certain code BOOK is written as 2-15-15-11, how is LAMP written in the same code?

    • A. 12-1-12-16
    • B. 12-1-13-16 ✓
    • C. 11-1-13-16
    • D. 12-2-13-16

    Solution. Each letter is replaced by its position in the alphabet: B is 2, O is 15 and K is 11. L is 12, A is 1, M is 13 and P is 16.

  6. 6. If in a certain code SPORT is written as TQPSU (each letter moved 1 place forward), how is GAMES written in the same code?

    • A. HBNFT ✓
    • B. GBNFT
    • C. HBMFT
    • D. HANFT

    Solution. Each letter is shifted 1 place forward: G→H, A→B, M→N, E→F, S→T, giving "HBNFT".

Exams that set Coding and Decoding

9 categories, led by Banking, Railways, SSC.

Also set by INET, JAIN JET, KMAT Karnataka, LIC AAO, MAT, MPPSC SSE, NABARD Grade A, NIACL AO, NMAT, OPSC OCS, PULEET, RBI Assistant, RBI Grade B, RPF Constable, RPF Sub-Inspector, RRB ALP, RRB Group D, RRB Junior Engineer, RRB Paramedical, RRB Technician, SBI Clerk, SBI PO, SEBI Grade A, SIDBI Grade A & B, SNAP, SSC CGL, SSC CHSL, SSC CPO, SSC GD Constable, SSC Junior Engineer, SSC MTS, SSC Stenographer, Territorial Army, TG LAWCET, UPPSC PCS, UPSC CSE. Browse all exams.

Coding and Decoding: frequently asked questions

How many coding and decoding questions are there?

323, from the 48 exams here whose syllabus sets the topic. 7% are graded easy and 20% hard, which makes coding and decoding about average for this section, where the mean is 17%.

Which exams ask coding and decoding questions?

48 of the exams on this site, weighted towards Banking (14), Railways (7), SSC (7). Every question in this pool comes from one of their own mock tests, so the list below is the honest answer to whether the topic is worth your time.

Is coding and decoding hard?

20% of these 323 questions are graded hard and 7% easy, making it about average for this section, where the mean is 17%.

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