Operating System (OS)
A linker

is not needed with a good compiler
creates a load module
is not necessary with variable partitions
None of these
must be run after the loader

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Operating System (OS)
Addressing modes

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

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Operating System (OS)
Memory management is :

replaced with virtual memory on current systems
None of these
not used on multiprogramming systems
not used in modern operating system
critical for even the simplest operating systems

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