Types
Coding and Decoding questions can be divided into following types:
- Letters
- Numeric
- Symbols
- Group of Words
Letters and Numeric
In letters and Numeric type, there can be many combinations but some expected and common types are explained with example.
Example
In a certain language, if SUNSHINE is coded as TVOTIJOF then how will MOON be coded:
- NPPQ
- NPPO
- PPON
- NQQP
Answer: NPPO
+1 in all the letters.
This is one type of question. In a similar way for the same type, there can be +2, +3 or there can be -2, -4, etc.
Example
In a certain language, if WRONG is coded as GNORW then how will RIGHT be coded:
- HIRGT
- SJHIU
- GHIRT
- None of the above
Answer: GHIRT
If you observe carefully then the coded word GNORW has same letters as in the original word. So, if we go by elimination method then option b is eliminated here itself. Now if we look at the pattern of coding, it can be observed that all the letters of WRONG are arranged in Ascending Order. So, in the same way, RIGHT will be coded as GHIRT.
There can be the same type of question asked but instead of ascending, the words can be in descending order.