Hi, this is my first time giving onsite for amazon (India location SDE1).
can you guys tell me if we will get a coding paltform (like hackerrank) to write the code?
or we will be asked to write only function based on the question interviwer explains us.

And do we only need to write function / full code (like for linkedlist related problems)

and other than that, do we need to brush up OS/Networking / DBMS too?