Coding-Decoding MCQs for CET 12th Level
Practice 20 free coding-decoding multiple choice questions for CET 12th Level exam. Instant answers, explanations in Hindi and English, and topic-wise targeted practice.
Master Coding-Decoding under Mental Ability for CET 12th Level with our curated MCQ set. Every question is sourced from real Rajasthan exam patterns and updated regularly. Switch between Hindi and English anytime. Use this daily to strengthen weak areas before the exam.
CET 12th Level — Mental Ability — Coding-Decoding
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
Consider the following statements regarding the prerequisites for a successful encrypted communication: I. The sender must convert meaningful text into an obscure format using a specific predefined rule. II. The receiver must know the exact same predefined rule to accurately retrieve the original information. Which of the statements is/are correct?
Question 2 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 3 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 4 of 20
Which of the following scenarios perfectly illustrates the process of 'Decoding'?
Question 5 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 6 of 20
In the reverse alphabetical numerical coding system, what is the numerical value assigned to the letter 'X'?
Question 7 of 20
If 'RAM' is coded as '@$%' and 'M' is represented by '%', what can be logically deduced about the code for 'MAR'?
Question 8 of 20
What is the forward alphabetical position of the letter 'W'?
Question 9 of 20
What is the primary operational utility of converting a meaningful message into a coded, obscure format?
Question 10 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 11 of 20
When a person attempts a coding-decoding examination question, why is memorizing an example rule considered an ineffective strategy?
Question 12 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 13 of 20
Match List-I (Words) with List-II (Codes based on standard forward numerical values): List-I P. MAC Q. CAB R. BAD S. DAD List-II 1. 3-1-2 2. 4-1-4 3. 13-1-3 4. 2-1-4
Question 14 of 20
What does the process of 'decoding' strictly involve?
Question 15 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 16 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 17 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 18 of 20
Which of the following pairs correctly represents the concept of 'Opposite Letters' in coding?
Question 19 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 20 of 20