To understand the difference; we need to know these terms one by one. All these examinations are directed towards research oriented professions. UGC and CSIR both are statutory organisations. The description are as follows:
National Eligibility Test (NET)
Junior Research Fellowship
University Grants Commission conducts NET exam and it tries to present two group of qualifiers which are as follows:
Council Of Scientific and Industrial Research (CSIR)
This is a premiere research institute in India conducting eligibility tests & fellowship for science and science related subjects. The subjects included are :
The recent addition to this framework is in the form of the National Testing Agency (NTA). It is a government body established to look up to the administrative forefront of how these exams are to be conducted.
Both CSIR & UGC have now transferred their entire exam process to NTA to make it more efficient & productive.