Coding-Decoding

Category : 6th Class

WHAT IS CODING?

Coding is a method of expressing something in a secret way.

 

WHAT IS DECODING?

Decoding is a process to understand a code language.

 

TYPES OF CODING

 

1.            Letter Coding: in this type of coding, letters are used in forward or backward or both the directions for making some code language.

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

               Word                                               Code

              ZOOLOGY                                PMMTMHD

              Here, Z, O, L, G and Y are replaced by P, M, T, H and D. Similarly, GOOGLY can be coded as HMMHTD.

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

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

 

 

EXAMPLE

 

If in a certain code language, POPULAR is coded as QPQVMBS, then which word would be coded as GBNPVT?

(a) FARMER                   (b) FAMOUS                  (c) FRAMES                   (d) FARMES

 

Explanation (b):

POPULAR is coded in the following way:

Similarly, we can obtain the word for which GBNPVT is code.

Consider as follows:

Thus, the required word is FAMOUS.

So, the correct option is (b).

 

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