UGC NET Coding-decoding Previous Year Questions (Mathematical Reasoning and Aptitude)
JRFSmart holds 21 previous-year questions on Coding-decoding from UGC NET Paper 1 (Teaching and Research Aptitude), filed under Unit 5: Mathematical Reasoning and Aptitude, drawn from 21 of the 87 exam papers in the bank (2023–2026). 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 coding | 4 |
| Letter position sums | 3 |
| Letter-position codes | 2 |
| Reverse letter-position codes | 2 |
| Letter-value sums | 2 |
| Letter shift | 2 |
| Numeric substitution coding | 1 |
| Number codes | 1 |
| Letter transposition | 1 |
| Word-number codes | 1 |
| Letter-number substitution | 1 |
| Letter-value coding | 1 |
NTA repeat analysis
Coding-decoding appears in 21 of 87 papers (24%), which JRFSmart rates as medium frequency.
Sample previous-year questions
Match the LIST-I with LIST-II LIST-I (Word) | LIST-II (Code) A. CRAB | I. 32 B. BARK | II. 49 C. OVER | III. 24 D. SING | IV. 60 Choose the correct answer from the options given below:
Match List - I with List - II. List - I (Word) | List - II (Code) A. BROWN | I. 50 B. TRING | II. 72 C. APPLE | III. 67 D. WATER | IV. 68 Choose the correct answer from the options given below :
If in a certain code language: 'EARTH' is coded as: 102364016 'HEART' is coded as: 161023640 Then how BIRTH shall be coded in that language?
If in a certain code language : "SCHOOL" is coded as 'HCSLOO' and "MEDIUM" is coded as 'DEMMUI' then how "TABLES" shall be coded in that language ?
If in a certain code language, "SUNDAY" is written as "TVOEBZ", then how "SCHOOL" shall be written in that language?
If in a certain code language : "Very bright boys" is coded as : 654 "Most boys are allrounder" is coded as : 1432 "Bright boys are smart" is coded as : 5437 then how "smart" and "bright" shall be coded in that language, respectively ?
In a certain coding language, if the word 'DRIVE' is coded as 'GOLSH', then the word 'COINS' will be coded as:
In a certain code language, SUMMER is written as T5NN2S and WINTER is written as X3OU2S. How SPRING shall be written in that language?
Showing 8 of 21 questions, without answers. Practise the full set with options, the official answer and JRFSmart's explanations.
Practise Coding-decoding
All 21 questions, one topic, with explanations and repeat data. One topic in every unit is free.
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