UGC NET Coding-decoding Previous Year Questions (Logical Reasoning)
JRFSmart holds 27 previous-year questions on Coding-decoding from UGC NET Paper 1 (Teaching and Research Aptitude), filed under Unit 6: Logical Reasoning, drawn from 27 of the 87 exam papers in the bank (2023–2025). Each question can be practised with a full explanation and shows how often NTA has returned to the same idea.
What is asked in Coding-decoding
The questions in this topic fall under these subtopics, ordered by how many previous-year questions each has.
| Subtopic | Questions |
|---|---|
| Substitution code across sentences | 5 |
| Letter position sum | 3 |
| Reflected alphabet cipher | 3 |
| Alternating plus-three minus-three shift | 2 |
| Half the sum of letter positions | 1 |
| Constant backward letter shift | 1 |
| Alternating plus-one minus-one shift | 1 |
| Incremental letter shift | 1 |
| Alternating minus-two plus-two shift | 1 |
| Alternating plus-two minus-two shift | 1 |
| Alternating minus-three plus-three shift | 1 |
| Letter position doubled | 1 |
NTA repeat analysis
Coding-decoding appears in 27 of 87 papers (31%), which JRFSmart rates as high frequency.
Sample previous-year questions
In a certain coded language : "CHAIR" is coded as : 61621836 "TABLE" is coded as : 40242410 "STOOL" is coded as : 3840303024 How "SOFASET" shall be coded in that language ?
In a certain code language, "INDORE" is coded as, "KPFQTG". How "CHENNAI" shall be coded in that language?
If a certain coding scheme, "DELHI" is coded as 5613910, then how is "MUMBAI" coded in this scheme?
If in a certain coded language: "KASHMIR" is coded as "JZRGLHQ", then how "LUCKNOW" shall be coded in that language?
In a certain code language: '617' means " Sweet and hot", '735' means "Coffee is sweet ", '263' means "Tea is hot ", What is the code for "Coffee is hot " in that language?
In a certain code, following sentences have been coded as mentioned below: 'Arjun is walking to school' is coded as 'NA', 'SI', 'AG', 'DR', 'VI' 'Krishna is speaking to Arjun' is coded as 'KA', 'TK', 'DR', 'SI', 'NA', 'School is within walking distance of…
In a certain coding scheme, 'AC' is coded as 8 and 'PQ' as 33. What is the code of 'XZ'?
If 'PEAK' is coded as 'KVZP' and 'FOUR' is coded as 'ULFI', the code of 'THIS' will be:
Showing 8 of 27 questions, without answers. Practise the full set with options, the official answer and JRFSmart's explanations.
Practise Coding-decoding
All 27 questions, one topic, with explanations and repeat data. One topic in every unit is free.
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