Question

Compare and contrast contiguous and non-contiguous memory allocation methods. Explain the First-Fit, Best-Fit, and Worst-Fit algorithms for memory allocation with examples. Which method is more efficient and why?

10 Feb 2025
Answer :
Word Count : 563

Contiguous and non-contiguous memory allocation are two primary methods used by operating systems for managing memory resources.

In contiguous memory allocation, each process is allocated a single contiguous block of memory. This method is simple to implement and ensures that the entire process occupies a continuous space in memory, making it faster for the CPU to access the process's memory. However, the main issue with contiguous allocation is fragmentation. Over time, memory is divided into small chunks that cannot be used by any process, even though the total unused memory is sufficient to store a process. This leads to external fragmentation, which can waste memory.

Non-contiguous memory allocation, on the other hand, allows processes to be stored in different blocks scattered across memory. This reduces fragmentation issues as processes can be allocated to any available block of memory. There are ______ ___ __________ _____ _____ ____ _____ _________ _________ ________.
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