Basic internal fragmentation doubt.

Question

Suppose I have two processes requiring 50 bytes each. If I have a single partition of 100 bytes. Can both the processes occupy this hole or only one of them causing an internal fragmentation of 50 bytes ?

Also if internal fragmentation is present then external fragmentation is also present?

Comments

Just tell me if I am right. If there are two fixed partitions each of 50 bytes and if one process requiring 40 bytes occupies first partition. Now if a process which requires 10 bytes cannot occupy first partition causing internal fragmentation.

If a process requires 60 bytes, then it cannot occupy remaining 60 bytes as they are not continuous causing external fragmentation.

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right...

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Thanks a lot

Answer 1

In fixed partition method partition will contain one process.

But in case of variable partition 100 bytes hole will be divided into two parts according to the size of the process and two processes can be allocated memory.

Answer 2

If you have a single partition of 100 bytes and two processes requiring 50 bytes each, then only one of the processes can occupy the partition at a time. This would result in an internal fragmentation of 50 bytes. Internal fragmentation occurs when memory is divided into fixed-sized partitions and a process is allocated to a partition that is larger than its memory requirements. The unused memory within the partition is wasted and cannot be used by other processes.