IT infrastructure (O.S)

Some operating system performance can be gained by increasing memory and kernel size

Operating systems provide an abstraction layer between (virtualized or physical) hardware and software applications.

Early operating systems could execute more than one program at a time

_______ are small applications that connect specific hardware devices to the kernel 

A spare node could be added to a cluster to handle failovers, This is called ______

A resource pool is the single unit of failover within a cluster. It typically contains some fields except:

The advantage of an N+N cluster is that the available hardware is always used

___ is the set of programs that, after being initially loaded into a computer by a boot program.

OS can't hide the technical complexities of the underlying hardware from the applications

Protecting an individual host from unwanted network traffic

The ______ is the heart of an applications operating system

File sharing does not enable files on one system to be accessed by other systems

The kernel schedules access to hardware to avoid conflicts between programs

Repairs a bug or flaw in the operating system that needs to be fixed fast. this is _______ .

Applications consist of 1 or more processes that communicate with the OS using system calls that are invoked through ___