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What are different ways of implementing free lists and which is simple among them?

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What are different ways of implementing free lists and which is simple among them?

(a) best fit, first fit, worst fit, simple-first fit

(b) best fit, first fit, worst fit, simple-best fit

(c) best fit, first fit, worst fit, simple-worst fit

(d) best fit  simple-best fit

This interesting question is from Free List topic in division Types of Lists of Data Structures & Algorithms I

I had been asked this question by my school teacher while I was bunking the class.

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Correct option is (a) best fit, first fit, worst fit, simple-first fit

For explanation: The‭ ‬simplest form of memory management system can be called as first-fit.‭ ‬a device or system maintains a single‭ ‬list of free memory locations.‭ ‬When request to memory is sent,‭ ‬the list is searched and the first block that is large enough is returned.

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