Coding-Decoding MCQs for CET 12th Level
Practice 20 free Coding-Decoding questions under Mental Ability — Reasoning & Mental Ability.
Strengthen your Coding-Decoding knowledge for CET 12th Level with curated MCQs. Switch between Hindi and English anytime.
CET 12th Level — Mental Ability — Coding-Decoding
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
Which of the following best describes the relationship between 'Coding' and 'Decoding'?
Question 2 of 20
Assertion (A): In opposite letter coding, the sum of the standard forward numerical positions of a paired letter combination is always 27. Reason (R): 'C' and 'X' form an opposite letter pair in the English alphabet.
Question 3 of 20
What does the process of 'decoding' strictly involve?
Question 4 of 20
If 'RAM' is coded as '@$%' and 'M' is represented by '%', what can be logically deduced about the code for 'MAR'?
Question 5 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 6 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 7 of 20
If a cryptographic rule pairs the letter 'D' exclusively with 'W', and the letter 'C' exclusively with 'X', what overarching logical framework is being utilized?
Question 8 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 9 of 20
Assertion (A): In word substitution coding, factual real-world knowledge is necessary but not sufficient to answer the question. Reason (R): The final answer must always be derived by passing the real-world fact through the artificial substitution rule provided in the problem.
Question 10 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 11 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 12 of 20
If decoding successfully converts '18-1-13' into 'RAM', what defines the relationship between the numbers and the word?
Question 13 of 20
Consider the following statements defining cryptographic processes: I. Coding is the deliberate process of transforming a meaningful sentence into a meaningless format using a secret rule. II. Decoding is the deliberate process of extracting a meaningful sentence from a meaningless format using the same secret rule. Which of the statements is correct?
Question 14 of 20
Which of the following is NOT a standard method of coding discussed in basic reasoning?
Question 15 of 20
Which of the following scenarios perfectly illustrates the process of 'Decoding'?
Question 16 of 20
If the word 'RAM' is coded as '18-1-13', what is the specific rule applied in this coding system?
Question 17 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 18 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 19 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 20 of 20