 The Coding-Decoding is part of verbal reasoning. It is used to test the student’s ability to decipher the code language. Coding is the process of converting a word into another word while decoding is converting back the converted word to its original word. The candidate will be required to decode the logic behind the coding and then apply it to code or decode another word.
The questions on coding and decoding are basically of three types as given below:

i] LETTER TO LETTER
Example.
If ‘SHIMLA’ is written as ‘RGHLKZ’, how will PATNA be written?
a) OZTMZ
b) OZSMZ <-
c) QBUMB
d) OZTZM
Solution: Each letter is coded as the letter previous to it i.e. S = R, H = G, M = L, L = K and so on. Therefore PATNA will become OZSMZ.

II] LETTER TO NUMBER
Example.
If LODES is coded as 46321, how will you code the word DOES?

a) 1234
b) 4321
c) 3621 <-
d) 3261
Solution: Here, all letters of DOES are present in LODES i.e. D = 3, O = 6, E = 2, S = 1.

III] MISCELLANEOUS TYPES
Example.
In a certain code ‘415’ means ‘milk is hot’, ’18’ means ‘hot soup’, and ‘895’ means ‘soup is tasty’. What number will indicate the word ‘tasty’?
a) 9<-
b) 8
c) 5
d) 4
Solution: Here, ‘hot’ is 1, ‘soup’ is 8. Which implies ‘is’ is 5. Therefore ‘tasty’ is 9.

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1. Kim