Interview Questions - Operating Systems

What is Executive in Windows NT?
In Windows NT, executive refers to the operating system code that runs in kernel mode.

What are the sub-components of I/O manager in Windows NT?
  1. Network redirector/ Server
  2. Cache manager.
  3. File systems
  4. Network driver
  5. Device driver

What are DDks? Name an operating system that includes this feature.
DDks are device driver kits, which are equivalent to SDKs for writing device drivers. Windows NT includes DDks.

What level of security does Windows NT meets?
C2 level security.