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RAS — Coding-Decoding MCQs

Practice 20 free coding-decoding multiple choice questions for RAS exam. Instant answers with explanations in Hindi and English.

Master Coding-Decoding under Mental Ability for RAS with our curated MCQ set. Every question follows real Rajasthan exam patterns. Switch between Hindi and English anytime.

RAS — Mental Ability — Coding-Decoding

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

In the standard forward alphabetical coding system, if 'M' equals 13 and 'D' equals 4, what is the numerical value of 'M minus D', and which letter does that resulting value represent?

Question 2 of 20

If a coding system utilizes the rule of 'Opposite Letters' (e.g., A corresponds to Z, B corresponds to Y), how will the word 'CAB' be coded?

Question 3 of 20

What is the primary operational utility of converting a meaningful message into a coded, obscure format?

Question 4 of 20

Which of the following scenarios perfectly illustrates the process of 'Decoding'?

Question 5 of 20

Consider the coding sequence where A is coded as E, P is coded as T, and C is coded as G. What specific transformation rule is being applied here?

Question 6 of 20

In the context of opposite letter coding, which letter represents the opposite pair for 'D'?

Question 7 of 20

Assertion (A): The sequence 'Z-1, Y-2, X-3' represents a reverse alphabetical coding rule. Reason (R): Reverse alphabetical coding assigns the highest numerical value (26) to the first letter of the alphabet (A).

Question 8 of 20

When a person attempts a coding-decoding examination question, why is memorizing an example rule considered an ineffective strategy?

Question 9 of 20

Assertion (A): The most crucial step in solving a coding-decoding problem is identifying the specific rule used to alter the information. Reason (R): Coding rules are universal and strictly follow the forward alphabetical numerical sequence.

Question 10 of 20

Match List-I (Coding Method) with List-II (Example) correctly: List-I P. Forward Alphabetical Coding Q. Reverse Alphabetical Coding R. Opposite Letter Coding S. Symbol Coding List-II 1. A becomes Z, B becomes Y 2. A=1, B=2, C=3 3. A=$, B=*, R=@ 4. Z=1, Y=2, X=3

Question 11 of 20

If the word 'RAM' is coded as '18-1-13', what is the specific rule applied in this coding system?

Question 12 of 20

In a word substitution coding system, 'Cloud' is called 'White', 'White' is called 'Sky', 'Sky' is called 'Blue', 'Blue' is called 'Black', and 'Black' is called 'Green'. According to this specific system, what brings rain to the earth?

Question 13 of 20

Which of the following best describes the relationship between 'Coding' and 'Decoding'?

Question 14 of 20

What does the process of 'decoding' strictly involve?

Question 15 of 20

Given a completely arbitrary symbolic reference key where A = $, B = *, R = @, and M = %. If an intelligence operative transmits the code string '$%*@', what actual text is the receiver reading?

Question 16 of 20

What is the specialized term for the cognitive and systematic process of converting a seemingly arbitrary numerical sequence like '20-1-14-21' back into the meaningful name 'TANU'?

Question 17 of 20

If a code uses the logic of shifting to the '3rd letter ahead' (e.g., A becomes D), what will the letter 'P' become?

Question 18 of 20

In a specific coding mechanism, 'TANU' is represented as '20-1-14-21'. Based on this exact logic, how would the word 'MAN' be coded?

Question 19 of 20

If a candidate decides to encrypt the word 'ZOO' strictly adhering to the reverse alphabetical numerical system, what integer will form the very first part of their resulting code?

Question 20 of 20

If a decoding program is fed the sequence '@@$$' and operates using the substitution key (A=$, R=@), what meaningful output will the program generate?

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