5th Class Mental Ability Coding-Decoding Coding - Decoding

Ø     WHAT IS CODING?

Coding is a method of expressing something in secret way.

 Ø     WHAT IS DECODING?

Decoding is a process to understand a code language.

Ø     TYPES OF CODING

1.    Letter Coding: Letters are used in forward or backward or both the directions for making some code language.

2.    Direct Letter Coding: Letters of a word are directly replaced by other letters. For example:

          Word                                         Code

           SALLY                                      BDCCZ

Here, S, A, L and Y are replaced by B, D, C and Z. Similarly, LAYS can be coded as CDZB.

3.    Number/Symbol Coding: Numerals or symbols are assigned to words.               

4.    Substitution Coding: Some particular words are assigned to certain names.            

EXAMPLE

1.         If INDIA is coded as 23426 and GREED is coded as 78994, then how will DEAR be coded?

              (a) 2396                        (b) 9468                        (c) 4968                         (d) 4986

Explanation (c):

DEAR: 4968

2.         If the code of PRESENT is TNESERP and code of PAPER is REPAP, then what will be the code of MONDAY?

            (a) YADNOM                 (b) YADOMN                 (c) YADMNO                 (d) YADMON

Explanation (a):          

Letters of word are written in reverse order to get their code.

So, code for MONDAY is YADNOM.