Coding–Decoding

What you'll learn

Learn how letter-shift, position, reverse, and word-substitution codes work in SSC-CGL Coding-Decoding, with a step-by-step method, the EJOTY trick, fully worked examples, and a practice quiz.

This chapter has

Coding–Decoding — solved practice questions

6 SSC / Banking General Intelligence & Reasoning questions with step-by-step solutions. Attempt each, then reveal the answer.

1. Q1medium

   If CAT is coded as DBU, how is DOG coded?

   • AEPH
   • BEPG
   • CFPH
   • DDPH
   Show answer & solution

   Correct answer: (A) EPH

   Each letter moves +1: D→E, O→P, G→H, so DOG → EPH.

2. Q2easy

   If A = 1, B = 2, C = 3 …, what is the value of the letter E?

   • A4
   • B5
   • C6
   • D3
   Show answer & solution

   Correct answer: (B) 5

   E is the 5th letter, so E = 5.

3. Q3medium

   If RED is coded by letter positions as 18-5-4, how is SUN coded?

   • A19-21-14
   • B18-20-13
   • C20-22-15
   • D19-20-14
   Show answer & solution

   Correct answer: (A) 19-21-14

   S=19, U=21, N=14 → 19-21-14.

4. Q4easy

   If MANGO is written as NBOHP, each letter has been shifted by:

   • A+1
   • B+2
   • C−1
   • D+3
   Show answer & solution

   Correct answer: (A) +1

   M→N, A→B, N→O, G→H, O→P — each letter is shifted by +1.

5. Q5medium

   If FACE is coded as GBDF, then DEAF is coded as:

   • AEFBG
   • BEFCG
   • CEGBG
   • DDFBG
   Show answer & solution

   Correct answer: (A) EFBG

   Each letter +1: D→E, E→F, A→B, F→G → EFBG.

6. Q6medium

   If CAB = 3-1-2 by letter position, then BED equals:

   • A2-5-4
   • B2-4-5
   • C3-5-4
   • D2-5-3
   Show answer & solution

   Correct answer: (A) 2-5-4

   B=2, E=5, D=4 → 2-5-4.

Want the full set? Practise all 6 Coding–Decoding questions →