Coding-Decoding

Category : 7th Class

 

WHAT IS CODING?

Coding is a method of expressing something in secret way.

 

WHAT IS DECODING?

Decoding is a process to understand a coded language.

 

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.

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

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

 

 

EXAMPLE

 

In a certain code, if the word 'ROAD' is coded as 'WTFI', then the word for the code 'GJFY' is

(a) REAP                                  

(b) TAKE                                  

(c) BEAT                                  

(d) LATE

 

Explanation (c):

Each letter of the word is five steps behind the corresponding letter of the code.

Thus, we have:

So, BEAT is coded as GJFY.

Hence, the correct option is (c).

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