Hello Afsar,

The paper is a 2.5 hour long  with 200 questions asked comprising of General Awareness, General Studies, and Hindi. Sample papers are available on many websites from where you may download soft copies or you may buy the previous year question paper book from e-commerce websites.

Please refer to the below official link of Allahabad High Court Review Officer for notifications:

http://www.allahabadhighcourt.in/event/event_6982_20-12-2019.html

Hope this Helps