Coding-Decoding

11 May 2020


CODING-DECODING is an vital part of Logical reasoning section in all Entrance tests and competitive exams wherein aptitude is included. Coding is a method of transmitting a message between the sender and the receiver in a particular code or pattern based on some set of rules so that no third person can understand it. While Decoding is a process used to decode or decrypt the pattern into its original form from the given codes.


Formulas For Coding Decoding

Coding involves representing English alphabets with other symbols so as to hide the correct meaning. 

Coding has two main type of questions. i. e. Letter Coding and Word Coding 

Letter Coding: In Letter coding, an English word and its corresponding code are given. While there is a one-to-one relationship between the given letters, the kind of relationship is certainly not fixed. 

? Letter Movement 
? Direct Coding 
? Reverse Coding 

Alphabet Numbers

Opposite Letters 

Sample Pattern 

 

Practice Questions For Coding-Decoding

Q1) In a certain code, COMPUTER is written as RFUVQNPC. How is MEDICINE written in the same code?

A) MFEDJJOE

B) EOJDEJFM

C) MFEJDJOE

D) EOJDJEFM

Solution :


Q2) In a certain code 'MISSIONS' is written as 'MSIISNOS'. How is 'ONLINE' written in that code?

A) OLNNIE

B) ONILEN

C) NOILEN

D) LNOENI

Solution :


Q3) If in a certain language, MADRAS is coded as NBESBT, how is BOMBAY coded in that code?

A) CPNCBX

B) CPNCBZ

C) CPOCBZ

D) CQOCBZ

Solution :


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Q4) If PAINT is coded as 74128 and EXCEL IS CODED AS 93596 then how would you encode ACCEPT?

A) 455978

B) 547978

C) 554978

D) 735961

Solution :


Q5) In a certain code ‘PURPOSE’ is written as ‘UPPRSOE’. How would ‘WATER’ be written in that code?

A) WATRE

B) AWTRE

C) AWETR

D) WEATR

Solution :

Interchange the letter in the pair of two and keep the last letter as it is.
WA = AW
TE = ET
So code of WATER is AWETR.

Q6) In a certain code ‘EASIER’ is written as TGKUCG. How is CUTTER written in that code?

A) TWVVGE

B) TGWWVE

C) TGVVWE

D) TVGVWE

Solution :

Letters are written in reverse and move +2. Reverse of CUTTER is RETTUC.
Now add 2 to each letter R+2=T, E+2=G, T+2=V and so on.
So code of CUTTER is TGVVWE.

Q7)  In a certain code ‘DAYLONG’ is written as ZBEKHOP. How is CORDIALwritten in that code?

A) SPDCMBJ

B) SPDEMBJ

C) DPSCMBJ

D) SPDCJBM

Solution :


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Q8) In a certain code ‘CORNER’ is written as GSVRIV. How is CENTRAL in that code?

A) DFOUSBM

B) GIRXVEP

C) GJRYVEP

D) GNFJKER

Solution :

Each letter of the word is moved four steps forward to obtain the code.

Q9) In a certain code ‘PULSE’ is written as DRKTO add 'NEW' is written as VDM. How is PROBES be written in that code language?

A) RDANQO

B) QSPCFT

C) TFCPSQ

D) OPNADR

Solution :


Q10) If ACTION is coded a ZXGRLM, then HEALTH will be coded in the same way as:

A) SVZOGS

B) TVZOGT

C) RUZPGR

D) QVGOZQ

Solution :


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