I had one subject of Linguistics while I was doing M.A English. Am I eligible to appear Net /Set exam in Linguistics?
Since your subject for Master's was English, you can only give NET/SET exam for English or related subjects.
You had one subject of Linguistics but it was not your specialization I assume. You are eligible for NET Linguistics only if you have completed your MA in Linguistics or any related field. Therefore you cannot give NET for Linguistics.
If you have any other query related to this, then do ask,