Is the entry test for DPS R.K Puram really difficult???

Okay so hey! I'm about to change my school (affiliated to ICSE) to DPS R.K Puram. I currently live in a different state and have planned to shift to Delhi after class 10th.

The main problem I'm facing is the difficulty level of the admission test. I have always been above-average student and among the top 10 students in my school but that doesn't slove the problem since I don't actually know what is the difficulty level of the admission test. What I wanna know is that- is the admission test for class 11th for DPS really very difficult? Is it easy enough for an ICSE student to get through without a thorough study of the full NCERT?

A lot of topics of NCERT are in common with the ICSE syllabus so I am not heading forward to gulping down the whole NCERT Book. Is it okay if I just give it a reading and solve random sample papers? Or should I actually study the book properly?

I need real and efficient responses guys. My future depends on this. Ofc the school I get admitted to and the place I start living in is gonna affect both my present and my future so please help me out with this.