Skip to main content
TakeMockTest

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 — 312 of them, from 46 exams, weighted towards Banking, SSC, Railways — so you can drill the topic on its own instead of meeting four of them inside a full paper.

19% of the pool is graded hard on this site’s own scale and 8% easy, which is about average for this section.

Questions
312
Practice set
25 in 25 min
Difficulty
24/228/60
Negative marking
None
Start Coding and Decoding practice

Coding and Decoding questions with solutions

6 from the 312-question pool, worked in full.

  1. 1. If ORDER is coded as PSEFS, how is LETTER coded in the same code?

    • A. MFUUFT
    • B. MFUUES
    • C. MFUUFS ✓
    • D. MEUUFS

    Solution. Each letter in ORDER shifts forward by one position: O→P, R→S, D→E, E→F, R→S. Applying the same +1 shift to LETTER: L→M, E→F, T→U, T→U, E→F, R→S, giving MFUUFS.

  2. 2. In a certain language, 'GARDEN' is written as 'ICTFGP' (each letter shifted forward by 2 positions in the alphabet). How is 'FLOWER' coded in the same language?

    • A. HNQYGT ✓
    • B. HNQYFT
    • C. GNQYGT
    • D. HMQYGT

    Solution. F→H, L→N, O→Q, W→Y, E→G, R→T, giving HNQYGT.

  3. 3. 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.

  4. 4. In a certain code, each word is simply spelled backward. How is 'POLICY' coded?

    • A. YCILPO
    • B. YCLIOP
    • C. YCILOP ✓
    • D. CYILOP

    Solution. Reversing the letters of 'POLICY' (P-O-L-I-C-Y) gives Y-C-I-L-O-P, or 'YCILOP'.

  5. 5. If A=1, B=2, C=3, and so on, what is the code for the word "GATE"?

    • A. 7-1-20-5 ✓
    • B. 7-1-19-5
    • C. 7-1-20-4
    • D. 6-1-20-5

    Solution. Using A=1, B=2, ..., Z=26: G=7, A=1, T=20, E=5, giving 7-1-20-5.

  6. 6. If in a code HOUSE is written as IPVTF (each letter shifted one place forward), how is CASTLE coded?

    • A. DBTUNF
    • B. DCTUMF
    • C. DBSUMF
    • D. DBTUMF ✓

    Solution. Shifting each letter forward by one place: C→D, A→B, S→T, T→U, L→M, E→F, giving DBTUMF.

Exams that set Coding and Decoding

9 categories, led by Banking, SSC, Railways.

Also set by INET, JAIN JET, KMAT Karnataka, LIC AAO, MAT, NABARD Grade A, NIACL AO, NMAT, 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 Selection Post, SSC Stenographer, Territorial Army, TG LAWCET, UPSC CSE. Browse all exams.

Coding and Decoding: frequently asked questions

How many coding and decoding questions are there?

312, from the 46 exams here whose syllabus sets the topic. 8% are graded easy and 19% hard, which makes coding and decoding about average for this section, where the mean is 17%.

Which exams ask coding and decoding questions?

46 of the exams on this site, weighted towards Banking (14), SSC (8), Railways (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?

19% of these 312 questions are graded hard and 8% easy, making it about average for this section, where the mean is 17%.

More reasoning topics

See all practice topics →