9th Class Mental Ability Coding-Decoding Coding-Decoding

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                    PMMTMHP

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

1. In a certain code language 'pit ne' means 'come here"; "ne ta ja' means 'come and go' and 'ja sa re' means "you and me". What does 'ta' means in that code language?

(a) go                            (b) and                          (c) here                          (d) come

Explanation (a):

(i) pit ne - come here

(ii) ne ta ja - come and go

(iii) ja sa re - you and me

From (i) and (ii), ne - come

From (ii) and (iii), ja - and

Hence, ta ? go