INTERVIEW QUESTIONS OPERATING SYSTEMS UNIX DETAILS

Question: Explain Memory Partitioning, Paging, Segmentation.

Answer: PAGING: Paging memory allocation algorithms divide computer memory into small partitions, and allocates memory using a page as the smallest building block.

SEGMENTAION: Segmentation means that a part or parts of the memory will be sealed off from the currently running process, through the use of hardware registers. If the data that is about to be read or written to is outside the permitted address space of that process, a segmentation fault will result.

PAGING: Paging memory allocation algorithms divide computer memory into small partitions, and allocates memory using a page as the smallest building block.

SEGMENTAION: Segmentation means that a part or parts of the memory will be sealed off from the currently running process, through the use of hardware registers. If the data that is about to be read or written to is outside the permitted address space of that process, a segmentation fault will result.
Source: CoolInterview.com

PAGING:-Paging is technique of allocating main memory to the process. In this the logical space of a program is divided into pages of equal size and main memory is divided into frames of size equal to page size. In this a page reside in any frame. In this pages are mapped to frames using Process Map Table(PMT).


Segmentation:- In segmentation logical address space of a job is divided into segments of may or may not be of equal size and main memory is also divide into segments.. Source: CoolInterview.com

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