Operating System (OS)
All of the following are task performed by the operating system except

Performing housekeeping task like file compression and disk defragmentation
Provides an interface for user to interact with computer
Controlling the access that application program has to the CPU
Managing hardware on the computer

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
The main function of the dispatcher (the portion of the process scheduler) is

assigning ready process to the CPU
None of these
suspending some of the processes when the CPU load is high
swapping a process to the disk
bring processes from the disk to the main memory

ANSWER DOWNLOAD EXAMIANS APP