Logical Reasoning is an interesting section and easy too if followed correct procedure to answer the questions. At least 25% of most entrance exam question papers include the Logical reasoning section. There are various concepts in this section and of which Coding and Decoding is one of them. 

Wondering how to answer the Coding and Decoding questions? This post shall provide the most important coding and decoding questions for DU JAT and other entrance exams. 

You can also know the steps to answer these questions easily. So, what are you waiting for? Read the complete post to know more about coding and decoding. 

What is Coding and Decoding?

Coding is a process of encrypting a word or a number in a particular pattern considering a set of rules. Decoding is the process of decrypting the pattern into the original form from the given code. 

Examples of Coding and Decoding

Various types of questions can be asked from coding and decoding, however here are three types explained in detail with an example.

Letter Coding

In this type of coding and decoding, the letters of a word are replaced by other letters according to a specific pattern.

If BROWN is written as ‘ZPMUL’, then VIOLET is coded as     

• TGMJCR
• SGMJCQ
• TGMJCQ
• TGWCQ

Number/Symbol Coding

In this type of coding, either numeral are assigned to a word or alphabets are assigned to numerals. 

If CHAIR is written as ‘12345’, RENT is written as ‘5678’, and then REAR is written as.

• 5635
• 5356
• 5365
• 5653

Substitution Coding

In this type of coding, some words are assigned with certain substituted names. 

If a dog is called a “cat”, a cat is called a “lion”, a lion is called a “rat”, then which of these lives in a forest?

• Rat
• Lion
• Dog
• Cat

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How to Solve Coding and Decoding Questions for DU JAT?

There are few tricks to remember while solving coding decoding questions in DU JAT Exam.

1. Observe the numerals or alphabets given in the question carefully.
2. Find the sequence in the code and understand whether it's ascending or descending.
3. Identify the rule in which the numerals and alphabets follow.
4. Now fill in the sequence or solve the question with an appropriate letter or numeral.

Important Coding and Decoding Questions for DU JAT Entrance Test

1. If TEACHER is coded as CAHEETR and STUDENT is coded as DUETNST, then what it is the code for SUCCESS?

• CECSUSS
• UCSECSS
• SCUSCES
• CCEUSSS

2. If white is called blue, blue is called red, red is called yellow, yellow is called green, green is called black, black is called violet and violet is called orange, what would be the colour of human blood?

• Red
• Green
• Yellow
• Violet

3. If LENT is written as C4A5B7D5, which word is written as D4C4A1B7?

• POKI
• OPIY
• PIUY
• PLAN

4. In a certain code language, 'no more food' is written as 'ta ka da' and 'more than that is written as 'sa pa ka'. How is 'that' written in that code language?

• sa
• ka
• sa or pa
• None of these

5. If $ represents addition and * represents subtraction, what is the value of the following expression?   15 * 5 $ 15 $ 10 $ 30 * 25 * 35 * 25 $ 20 * 25 * 20

• 30
• -45
• 10
• -25

6. If 20 – 4 = 10 and 30 – 6 = 10 then 40 – 8 = ?

• 30
• 24
• 10
• 28

7. If West is called as North-East, North-East as East, East is called as South-West, South-West is called as North, North is called as North-West, North-West as South and South is called as South-East, then pole star in which direction?

• North -East
• North-West
• North
• South-West

8. If KEDGY is coded as EKDYG then how will LIGHT be coded?

• ILHTG
• ILGHT
• THGIL
• ILGTH

9. If BAD is coded as YZW and FIGHT is coded as URTSG. How will you encode HIGH?

• TRST
• SRTS
• STSR
• TSRT

10. If CAFE is coded as 3165 and HIDE is coded as 8945, how will you encode HEAD?

• 8514
• 5816
• 9156
• 8154