For the preparation of current Affairs in TISSNET exam you should have the information about Last 1 year current affairs on social issues, cases, economic affairs, national and international major affairs.

The topics you can cover:

Art and culture: Traditional dances, famous artists and their fields, Customs etc
Sports personalities and their sports
Recent Awards and honours
Prize winning Books and authors
Government schemes
Basic economy: RBI, GDP sector wise, Budget highlights, revolutions in agriculture sector, high crop producing states etc
General science (Around 10 important topics)
Committees formed by RBI and Government
Socio-economic affairs
History: Timeline of Indian freedom struggle, Nick names of freedom fighters, books written by them, Major achievements in social and economical front after independence, Major ancient history related to art and culture
Current affairs based Polity and geography

Good Luck!