Operating System (OS)
Addressing structure

None of these
All of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
defines the fundamental method of determining effective operand addresses
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP