Given memory partition of 100KB,500KB,200KB and 600KB(in order), how would each of the first fit , best fit and worst fit algorithms place processes of 212KB ,417KB,112KB and 426KB(in order)?

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written 6.8 years ago by

devikaraniroy • 640

modified 2.3 years ago by

sagarkolekar ★ 11k

Which algorithm makes the most efficient use of memory?

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written 6.6 years ago by

devikaraniroy • 640

First fit

212 K is put in 500 K partition.

417 K is put in 600 K partition.

112 K is put in 288 K partition. (New partition 288 K = 500 K - 212 K)

426 K must wait.

Best-fit

212 K is put in 300 K partition.

417 K is put in 500 K partition.

112 K is put in 200 K partition.

426 K is put in 600 K partition.

Worst-fit

212 K is put in 600 K partition.

417 K is put in 500 K partition.

112 K is put in 388 K partition. (600 K - 212 K)

426 K must wait.

In this example Best-fit is the best solution.

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