Download file in size time complexity

In this way, a file is conceptually very much like an array. If you want to insert something at the front or in the middle, you have to make a hole for it. If you want to remove something, you have to fill the voided space. There are file systems that let you patch files together from non-contiguous blocks. That is, you could have something that is logically like:.

The file system takes care of splitting and coalescing chunks as necessary. Those file systems aren't exactly rare, but that functionality typically isn't used by normal programs. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Time complexity of file modification? Ask Question. Asked 5 years, 2 months ago. Active 5 years, 2 months ago.

Viewed times. What is the time complexity with respect to file size of these file modifications? Overwriting Appending inserting at the end Prepending inserting at the beginning Inserting in the middle. There is no "fast" or "slow" per se in time complexity. It's also a bit strange question since these depend highly on hardware, file systems, this and that. The answers would depend at least on part on whether or not the OS supported non-contiguous files.

Sami They don't exist as technical terms though "superfast" is practically a technical term in numerical analysis , but I'm clearly not using them as technical terms. And a question that depends on the specs just means that a great answer would talk about how the most common specs handle it, with an exceptional answer discussing what else is out there.

Add a comment. Active Oldest Votes. In most file systems: Overwriting a file is O n , where n is the number of bytes to be written. Appending a file is O n , where n is the number of bytes to be written. So if you have: This is a test system. And you want to insert "of the emergency broadcast" after "test", then you first have to make a hole for the inserted text: This is a test system. Nie, et al. Thien and J. Lin, Secret image sharing, Comput. Liu, C. Yang, C. Wu, et al.

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