A Physical Address is ______. 1. The set of all addresses within physical memory

Question

A Physical Address is ______. 1. The set of all addresses within physical memory 2. An address within the program (appearing in a program instruction) 3. The set of all addresses within the process itself 4. An address within primary memory The Worst Fit method of block identification for partition creation ______. 1. Chooses the block closest in size to the fixed partition 2. Chooses contiguous disk blocks 3. Results in larger blocks of free memory left after partition creation 4. Chooses the block exactly the size of the process Swapping _____. 1. Rolls processes in and out of primary memory 2. Is used when memory is empty 3. Results in primary storage getting full 4. Is a quick process. Internal fragmentation of memory exists when ____. 1. Unused memory is outside a partition 2. Unused memory is inside a partition 3. Free holes are internal to the partition 4. Free pages are not contiguous

Explanation / Answer

Ans 5. 1) The set of all addresses within physical memory.
Reason: Physical addresses are delivered directly by the machine - one physical address space per machine.
The size of physical address decides the highest no. of addressable physical memory.

Ans 6. 3) Results in larger blocks of free memory left after partition creation.
Reason: Worst-fit:- It allocates the largest free block. We must find the entire list,unless it is ordered by size. This technique produces the largest leftover hole,which may be more beneficial than the smaller leftover hole from a best-fit approach.

Ans 7. 1) Rolls processes in and out of primary memory
Reason: Because Swapping variant used for priority based scheduling algorithms. As the lower priority process
is swapped out, the higher priority process is loaded and executed.

Ans 8. 2) Unused memory is inside a partition
Reason: Unused memory is inside a partition because it is the space wasted inside of allocated memory block which in turn is due to the restriction on the permitted size of allocated blocks.

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