What is Coding Decoding :
A ‘Code’ is a system of conveying a message through signals. It is a method of sending a message between sender and the receiver in such a way that only the sender and the receiver can know its meaning. However ‘Coding’ is done according a certain pattern in the mind of the sender. Therefore, its meaning can be deciphered by a third person. Only if he carefully studies this pattern. This process is called ‘Decoding’. This capability is important in many fields of application.

The ‘Coding- Decoding’ test is set up to judge the candidate’s ability to decipher the pattern which goes behind a coded message or statement. There are many types of coding:

A. LETTER CODING
In such questions, code values are assigned to a word in terms of the alphabets. There are following types of letter coding.

Type 1 : In this category, one word is coded according to a particular pattern and the candidate is asked to give the code letters for another word following the same pattern of coding.

Ex. The word MAN is coded as NBO. Which of the following should be the code for SKY?

Sol. The first letter of the code N comes after M. the first letter of the word in question. Similarly,
the second letter B comes next to A of the question, and the third letter of code O comes after N of the main word. Following this pattern we can say that TLZ is coded as SKY. LETTER AND UMERICAL CODING In these questions either numerical values are assigned to a word or alphabetical code values are assigned to the numbers. The candidate is required to analyze the code according to the directions.
Ex. In a given code SISTER is coded as 535301 UNCLE as 84670 and BOY as 129. How
is RUSTIC written in the code ?
(a) 633185 (b) 185336
(c) 363815 (d) 581363
(e) None
Sol. In this code the alphabets are coded as follows
S I S T E R U N C L E B O Y
5 3 5 3 0 1 8 4 6 7 0 1 2 9
If we apply this method , the code comes out to be 185336

Multiple Choice Questions
1) In a certain coding system MOTHER is coded as PQWJHT, how will you code SISTER?
a) VKUVHT b) VKVVHU
c) VKVVHT d) VKVVHS

2) In a certain coding system PRICE is coded as SVNIL, how will you code COST?
a) F SXY b) FSWY
c) FTWZ d) FSXZ

3) In a certain coding system FLOWER is written as SEXOMF, how will you code
GARDEN?
a) OEERBH b) OFESBH
c) OEESBG d) OEERBG

4) In a certain coding system TRAIN is written as GIZRM, how will you code FIGURE?
a) USTGKV b) VTYXTC
c) URTFIV d) VKGTSV

5) If SINGLE can be given a code number of 66, what code number can be given to
WINKLE?
a) 76 b) 66
c) 78 d) 74

6) If REASON is called as 5 and BELIEVED as 7, what is the code number for
GOVERNMENT?
a) 10 b) 8
c) 9 d) 6

7) If PRATAP could be given a code number 1618120116, what code number can be given
to NAVIN?
a) 73957614 b) 24639125
c) 14122914 d) 19274651

8) If CENTURION is coded as 325791465, and RANK as 18510, what will the figure 78510
represent?
a) TANK b) BANK
c) TAKE d) SANK

9) If WORK is coded as 4567 and MAN 328, then WOMAN is coded as
a) 45328 b) 43528
c) 32845 d) 35428

10) If spider is written as PSDIRE, how would COMMON be written in that code
a) OCOMMO b) OCMMNO
c) OCMOMN d) OCMMON

11) If (a) ‘gnr tag zog qmp’ stands for ‘Seoul Olympic organizing Committee’, (b) ‘hyto gnr
emf’ stands for, ‘Summer Olympic Games, and (c) ‘esm sdr hyto’ stands for ‘Modern Games History’, What would ‘summer’stands for?
a) gnr b) hyto
c) emf d) zog

12) In a certain language ‘526’ means ‘sky is blue’, ‘24’ means ‘blue colour’ and ‘436’
means ‘colour in fun’. Which digit in that language means ‘fun’?
a) 2 b) 3
c) 4 d) 6

13) If a rectangle is called a circle, a circle a point, a point a triangle, a triangle a square,
then wheel is a:
a) rectangle b) circle
c) point d) triangle

14) If the letters is PRABA are coded as 27595 and THILAK are coded as 368451, how can
BHARATHI be coded?
a) 96575368 b) 57686535
c) 96855368 d) 37536689

15) If JAILAPPAS is coded as AIJAPLASP, ECONOMICS will be coded as:
a) COEMONCSI
b) COEOMNCSI
c) OECMONSCI
d) OECOMNCIS

Key (Coding and Decoding)

1. c , 9. a
2. d ,10. b
3. d ,11. c
4. c ,12. b
5. d ,13. c
6. c ,14. a
7. c ,15. b
8. a,