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Coding – Decoding

Letter Coding - In this letters in a given word are replaced by certain other letter according to a specific rule to form its code.
For Example-
If ‘SHIMLA’ is written as ‘RGHLKZ, then PATNA be coded as OZSMZ.That
means each letter is coded as the letter previous to it.

Direct letter Coding - In this type of question , the given code letter occur in the same sequence as the corresponding letters occur in the words.
For Example : If in a certain language MYSTIFY is coded as NZTUJGZ,
how is NEMESIS coded in that language?

Explanation : Each letter in the word MYSTIFY is moved one step forward
to obtain the corresponding letter of the code.So, in NEMESIS, N will be
coded as O, E as F, M as N and so on. Thus, the code becomes OFNFTJT.

values are assigned to a word or alphabetical code letter are assigned to a number.
For Example-If in a certain language A is coded as 1,B is coded as 2,and
so on , how is BIDDIC is coded in that code?

Explanation : As given the letters are coded as
             A B C D E F G H I
             1 2 3 4 5 6 7 8 9
So,in BIDDIC, B is coded as 2, I as 9,D as 4 and C as 3. Thus, BIDDIC is
coded as 294493.

Decipher Massage Word Codes-To analysis such code,any two massage bearing a common word are picked up,that common words represent the word.
For Example - If ‘ish lto inm’ stands for ‘neat and tidy’ ; ‘qpr inm sen’ stands for ‘small but neat’ and ‘hsm sen rso’ stands for ‘good but erratic’, what would ‘but’ stand for ?

Explanation : In the second and third statements, the common code word
is ‘sen’ and the common word is ‘but’. So, ‘sen’ means ‘but’.

Substitution – In this type of questions,some particular words are assigned certain substituted names.Then a question is asked that is to be answered in the substituted code language.

For Example – If white is called blue, blue is called red, red is called yellow, yellow is called green, green is called black, black is called violet and violet is called orange, what would be the color of human blood?

Explanation : The color of the human blood is ‘red’, and as it is given that ‘red’ is called ‘yellow’. So, the color of human blood is ‘yellow’.