Coding Decoding for Bank Exams

By : Kanika Ralhan

Updated : Oct 21, 2020, 13:54

The Coding-Decoding section is very important for banking exams. In coding, a word is converted into another language by using numbers and letters. And converting the coded value into normal language is the process of decoding. Start your preparation by following the syllabus of coding-decoding for bank exams, and making a list of coding-decoding formulas. You need have to practice coding-decoding online tests regularly and try solving coding-decoding questions and answers for bank exams.

The coding-decoding questions and answers pdf for bank exams and coding-decoding notes for bank exams are easily available on BYJU'S Exam Prep.

  • The important banking exams are SBI Clerk, SBI PO, IBPS Clerk, IBPS PO, RBI Grade A, B, IBPS RRB Clerk, PO etc.

Important Coding-Decoding Topics for Bank Exam



Basic Points for Alphabets/ Numbers and Words Coding-Decoding

Positions of alphabets (A=1, B=2, C=3, D=4,...Z=26)

Opposite positions will be like (A=26, B=25, C=24, D=23,... Z=1)

Opposite of each alphabet like (A to Z, B to Y, C to X, D to W, and so on)

Letter Coding

By following a specific rule, in this coding, the alphabets of a word are replaced by certain other alphabets. For example, 'DONKEY' can be written as 'ENOJFX' by following one step forward and one step backward letters of code. Likewise, 'HORSE' can be written as 'INSRF' by following the same rule.


Here names or words are substituted with different names or words. For example, if ‘cat’ is known as ‘dog’, ‘dog’ is known as ‘tiger’, ‘tiger’ is known as ‘lion’. What will be the name of the ‘national animal’? Here, as ‘tiger’ is coded as ‘lion’ so, the answer will be ‘lion’ instead of ‘tiger’.

Mixed Letter Coding

Here you have to find out a particular coded word with reference to three-four messages of the coded language. For example, If 'tpw lkp otr' stands for 'neat and tidy' 'inm sen tpw ' stands for 'small but neat', and 'grh sen hwt' stands for 'good but erratic', what would 'but' stand for?

The answer will be 'sen', as in the 2nd and 3rd statement the common code word is 'sen and but.'

Mixed Number Coding

Here you have to find out the numbers in relation to phrases. For example, if '57' means 'which category' and '985' means 'class and category'. What is the code for 'category'? The answer will be 5, because the common code digit is '3' and the common word is 'category'.

Tips to Prepare Coding-Decoding Questions

  • Keep keen observation on the alphabets or numbers that are mentioned in the code.
  • Find out whether it is following an ascending or descending sequence.
  • Find out the rules that the numbers/ alphabets or words are following.
  • Fill up the blank space with the proper numbers/ alphabets or words.

Importance of Coding-Decoding Section in Competitive Banking & Government Exams

  • Using the Coding-Decoding method, you will be able to solve the questions asked from the reasoning section easily, and in less time.
  • If you learn the Coding-Decoding tricks, you can easily solve any problems in under a minute. In competitive banking exams, every minute is crucial. very important.
  • Coding-Decoding is also very interesting. Once you practice properly, your marks in the Quantitative section will increase.
  • Coding is used for encrypting a number/ word in code, while Decoding is used for decrypting the pattern to its original form by using the mentioned code.

Most Recommended Books for Coding-Decoding

Below-mentioned below are a few books that candidates can refer to for learning Coding-Decoding for competitive banking exams:



Quantitative Aptitude

Dr R .S. Aggarwal and S. Chand

How to Crack Test Of Reasoning

Jaikishan and Premkishan

Quantitative Aptitude


Why Prepare Coding-Decoding From BYJU'S Exam Prep? 

Coding-Decoding is very important to solve reasoning questions for any banking or competitive exams. Since last year, there has been a change in the question pattern of Coding-Decoding. At BYJU'S Exam Prep, you can practice Coding-Decoding from the basics. Once your the basics of Coding-Decoding are clear, you can solve reasoning questions quickly. For your help, BYJU'S Exam Prep provides lots of examples of all the patterns of Coding-Decoding from easy to difficult. This will help you to understand the Coding-Decoding clearly. You can also go for a trial class for Coding-Decoding from BYJU'S Exam Prep.                                                     



  • How many types of Coding-Decoding are there?


There are five types of Coding-Decoding.


  • What is direct letter coding?


In direct letter coding, the code letter occurs in the same direction as the correlative letters occur in words.


  • Is Coding hard to learn?


No, if you have the patience to learn, you will find it easy.


  • Is it fun to code?


Yes, Coding is fun, as you can learn to build an application in Coding.


  • Does every bank exam ask questions from Coding-Decoding?


 Yes, in every bank exam, questions from Coding-Decoding are asked, and it carries good weightage in terms of marks.