3055q10b - Score Name ECE 3055 Quiz November 7 2003 1‘96...

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Unformatted text preview: Score: Name: ECE 3055 Quiz - November 7, 2003 1‘96 ’ l. Them term 3 CLlQJUler‘ in an Operating. System is responsible for ea c. selecting the next process to run from the ready queue. 2. In a multiprocessing OS, what prevents a user application from staying in the run state forever (explain)? process ‘l'erminal’ef fi-Q—Ki‘l's pro Cass makes API call +0 05 Jam. slice Mttrrvpi 9+°P"‘ WW” 3. Explain the problems that would likely occur with 1/0 devices and operations, if there was not a hardware mode bit with privileged I/O instructions in a multiprocessing system. U50.“ mprllem‘l‘iohf (Lat/‘01 olipech OICLCQS‘S' Aaroiwqu Q‘lvs‘;n5 Squm'ns phoL/‘emy wr‘H’i /0 Diet/ice} (EX. Seviml process‘ef Coral?l +r‘y +0 ph-Qn‘l' qr 4kg same, fume.) 4. List the three most important hardware features needed solely for protection of the CPU, I/O devices, and memory in a modern multiprocessing OS (explain each briefly). CH, Pro'l'ec'l'l'On " +lmar~ ;or~ +‘Ime Slit-2. lh+€fva+ ‘ 1/0 rocked-{0“ "- MOOlfickN-‘l’ Wf‘l'L‘ Pr‘lViltjcal IIO lhf‘ihpfilim _ only 0? Qqn +QU< ir¢¢_‘l‘l7 '1'“ I/O d€V{C£f Memes p§lgeiw'un‘ Virtual Mermaoy w$+1~ crew-S5 p‘\3k15'ly\ page-Labia)" on base. amok “WI-‘4' raj‘ql'tl‘s‘ For kqv‘alwotr‘e Memcny_Pno+e-©+“on 5. Would a long I/O bound job on a system with no other processes active in the system likely spend more time sitting in the ready queue, running, or in the wait ueuefexplain)? 11/0 bbonol Adl‘S yum/ltd l. 9-7 Sftnol M‘W‘C 46m; in +Le wou‘l' $02M?" wort .n on Slow Ifo Opemirlonj +0 Gwyn/641‘ ...
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