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LDC — Coding-Decoding MCQs

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

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

LDC — 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 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 2 of 20

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

Question 3 of 20

Using the reverse alphabetical numerical coding system where Z=1, Y=2, and X=3, what will be the numerical code for the word 'BAY'?

Question 4 of 20

In a defined word substitution cipher: 'Cloud' translates to 'White', 'White' translates to 'Sky', 'Sky' translates to 'Blue', 'Blue' translates to 'Black', and 'Black' translates to 'Green'. If an individual wants to refer to the color of milk in this coded environment, which word must they use?

Question 5 of 20

Which of the following is NOT a standard method of coding discussed in basic reasoning?

Question 6 of 20

What is the forward alphabetical position of the letter 'W'?

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

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 9 of 20

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

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

What is the fundamental purpose of the process known as 'coding'?

Question 12 of 20

In the reverse alphabetical numerical coding system, what is the numerical value assigned to the letter 'X'?

Question 13 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 14 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 15 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 16 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 17 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?

Question 18 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 19 of 20

Match List-I (Alphabetical ranges) with List-II (Numerical positions) for standard forward coding: List-I P. First three letters Q. Letters E, F, G R. Letters U, V, W S. Last three letters List-II 1. 24, 25, 26 2. 5, 6, 7 3. 1, 2, 3 4. 21, 22, 23

Question 20 of 20

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

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