Hello Sandhya,

The JEE advanced test will be conducted in computer-based mode and have two papers - Paper I and Paper II, with both papers are mandatory. Questions in each paper will be asked from physics, chemistry and mathematics. The marking scheme has  the concept of full, partial and zero marks. The maximum marks may vary as observed by the trends.

So yes both papers are mandatory in JEE advanced.

I hope this helps. All the best.