KCET

No, only those students who have cleared their SSC (Class 10) or HSC (Class 12) exams from Karnataka are eligible to appear for the KCET exams. Other top national level medical entrance exams you can apply to are as follows:
1) NEET UG (National Eligibility cum Entrance Test Undergraduate)
2) AIIMS M

Sorry to say that, you cannot apply for KCET examination being from another state as the eligibility criteria specify that any candidate wishes to appear for the entrance examination should have studied and passed in one or more government or government recognised institutions in the state of Karnat

COMEDK is for students from all over India but KCET is only for students of Karnataka.

KCET exam covers whole syllabus of class 11th and class 12th of Karnataka board.

It is not actually required for your clarification, you still can refer this link:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/exams/kcet&ved=2ahUKEwjxnJT6x4LZAhUKwI8KHWuOCR8QFjAaegQIDRAB&usg=AOvVaw05-1Cgx1L2zEG4ibhUs1AU.

No, it's within the scope of NCERT.

No, it's within the scope of NCERT.

Karnataka CET is being conducted for Domicile students of Karnataka, there are exceptions for the wards of state & government employees & defense personnel.
Find below eligibility criteria to apply for K-CET entrance in Karnataka.
1. Those candidates who have studied for complete TEN academic years i