Reasoning Coding and decoding

Coding and decoding are used in defence service and any other service for secret message.In coding a word is coded by various pattern.

Coding and decoding is easy to learn - You will enjoy it.

Coding and decoding is classified in three types:

1. Jumbled pattern
2. Substitution pattern
3. Shifting pattern

Jumbled pattern

In jumbled pattern the word are in specific pattern, that pattern should be applied to other words.

1) ETRAEHT
2) ERTAEHT
3) THEATRE
4) TREAEHT

Explanation:

Substitution pattern

In Substitution pattern the word is substituted by a letter or number.

In a certain code “APPLE” is coded as 23125, “LAP” is coded as 312, “CAP” is coded as 214 then “LEAP” = ?

1) 3513
2) 3512
3) 3516
4) 3515

Explanation: In APPLE , P is repeated twice . So P = 2 . In the above three words 'A' is common , so A = 1. In LAP, A = 1 and P = 2, so L = 3. In APPLE , P = 2, A = 1, L = 3, then E = 5. So LEAP can be coded as 3512.

Shifting Pattern

In shifting pattern every letter is written as another letter following a definite patterns.

Normal shifting pattern: in this pattern the letter of the word following a unique shifting pattern.

Ex: In a certain code language PURPOSE is coded as OVQQNTD. How is PATTERN coded in the language.

1)OBSUDSM
2)OAQUDSM
3)OCSUDSM
4)MASUDSM

Explanation: Here, every alternative starting from first letter is shifted one place and every alternative letter starting from the second letter is shifted one place forward.

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