Give an example where contiguous allocation of file blocks on disks can be used in
practice.

Answer:

-Contiguous allocation of file blocks on disks can be used when you're writing a memory dump (of your known 2GB or so of memory) because your OS crashed ;) Jesting aside, contiguous allocation is painful because it is necessary to know the file's final size prior to even allocating any space. It is still used on write-once optical media, because prior to burning your CD, DVD or BD the system knows exactly how much space each file uses on said disk.

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