压实作用（compaction）

As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called ______.

A:fragmentation B:compaction C:swapping D:paging

As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called ______.

A:fragmentation compaction B:swapping C:paging

As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called（）

A:fragmentation B:compaction C:swapping D:paging

As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called ______.

A:fragmentation B:compaction C:swapping D:paging

As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called （）.

A:fragmentation B:compaction C:swapping D:paging

As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called （）.

A:fragmentation B:compaction C:swapping D:paging