Coding-Decoding MCQs for RAS
Practice 20 free Coding-Decoding questions under Mental Ability — Reasoning & Mental Ability.
Strengthen your Coding-Decoding knowledge for RAS with curated MCQs. 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
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 2 of 20
Which of the following scenarios perfectly illustrates the process of 'Decoding'?
Question 3 of 20
If a symbolic coding rule is established where A = $, B = *, R = @, and M = %, what will be the decoded meaning of the string '@$%'?
Question 4 of 20
If Z=1, Y=2, X=3, and W=4, what will be the numerical value of the word 'CAB' using this specific logic?
Question 5 of 20
If a symbolic coding rule is given as A=S, B=R, and M=%, what does this signify?
Question 6 of 20
According to the fundamental principles of reasoning, why is an un-coded message vulnerable?
Question 7 of 20
Consider a word substitution cipher: 'Cloud' is 'White', 'White' is 'Sky', 'Sky' is 'Blue'. If a person wants to look at the atmosphere above the earth during a clear day, what will they look at according to this cipher?
Question 8 of 20
Assertion (A): If a coding logic dictates that A becomes E and C becomes G, then the letter M will logically be coded as Q. Reason (R): The applied coding logic consistently shifts the original letter forward by exactly 4 alphabetical positions.
Question 9 of 20
Consider the following statements regarding the rules of coding: I. It is highly useful to memorize all coding rules in advance to solve questions. II. Every coding question typically employs a distinct and unique rule. Which of the statements is correct?
Question 10 of 20
Consider the following statements regarding the shifting of letters (e.g., A -> E): I. It involves replacing a letter with another letter located at a specific forward or backward distance in the alphabet. II. It requires memorizing the word 'Cloud is White'. Which of the statements is correct?
Question 11 of 20
Match List-I (Alphabetical Letters) with List-II (Reverse Numerical Positions) correctly: List-I P. A Q. B R. C S. D List-II 1. 23 2. 24 3. 25 4. 26
Question 12 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 13 of 20
Consider a two-step coding process: First, find the opposite letter, then find its forward numerical position. What is the code for the letter 'C' under this system?
Question 14 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 15 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 16 of 20
Which of the following pairs correctly represents the concept of 'Opposite Letters' in coding?
Question 17 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 18 of 20
Why is the strategy of memorizing specific coding rules (e.g., A always equals 1) generally considered completely useless by examination experts?
Question 19 of 20
In word substitution, if 'Blue' is coded as 'Black', and 'Black' is coded as 'Green', what is the actual, un-coded color of the sky?
Question 20 of 20