Question

8. What are two memory placement algorithms? Describe how they work.

Answer 1

What are the two memory placement algorithms?

The memory placement algorithms are first fit, best fit and next fit.

first, fit:

it places the process in the first free partition which can accommodate it.

it is the fastest algorithm.

But, some memory is left unused and wasted and tough enough memory is available, it is not used properly.

Best fit:

it places the process in the smallest possible partition and makes the no wastage of memory.
it is the best algorithm.
it is slower.

worst fit:

it places the small size process in the large partition.

it is the worst algorithm.

it reduces the rate of production of small gaps.

nest fit:

it is an updated version of the first fit.

it starts as the first fit while finding a free partition.
it starts from where it left off when called next time.

it does not start from the beginning.