It-109-Assignment 1 Essay

643 Words3 Pages
“Operating system functions” 1.1-1.6 What are the major functions of an operating system? Connect from hardware to the applications / Ram/ Software etc. / What is a file system and what are the three major file systems supported by windows? A file system is when the computer names and storages the date and organizes & –FAT –HPFS – NTFS supported by windows. What are limitations of these three file systems? 1. Ntfs- names limited to 255 utf – 16 code words / maximum volume size / maximum file size 2.Fat- clusters can’t be 64 kb / must contain 65,527 clusters 3. Hpfs under 200 mb large 400 mb some performance degradation. What is windows registry, and what is its purpose? Windows registry is the main part where software and application keys / data / information are at. If messed windows won’t work. What are key requirements memory management should satisfy? Relocation, sharing, physical organization, protection logical. What kind of memory address does a central processing unit (CPU) generate? Logical address What kind of memory address does a memory management unit (mmu) generate? Physical address What is the process of loading a process from secondary memory into primary memory? Input/ output channel from transferring data Homework -What are three main purposes and operating system? User interfaces / manages hardware / design to apps What are the main differences between operating systems for mainframe computers and personal computers? The number of users List the four steps that are necessary to run a program on completely dedicated machines- a computer that is running only that program. Machine time, load address, and execute address, module apps We have stressed the need for operating systems to make efficient use of the computing hardware. When is it appropriate for the operating system to forsake this principle and to “waste” resources?

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