《操作系统期末复习资料-华南理工》《操作系统》试卷英文有答案.docVIP

诚信应考,考试作弊将带来严重后果！ 华南理工大学期末考试 《操作系统》试卷(B) 选择题(共20分，每题2分) When the printing event which a process requested is finished, transition _______ will occur. Runningready C. blocked→running running→blocked D. blocked→ready Shared variables are those that ______ can only be accessed by system processes can only be accessed by a lot of process mutual exclusively(独占地) can only be accessed by user processes can be accessed by a lot of process It is provable（可以证明） that ______ scheduling algorithm is optimal（最理想） if all the jobs are available simultaneously. FCFS B. SJF C. Round-robin D. Priority In a system, we require all processes to request all their resources before starting execution. This is a method for preventing deadlock to attack the ________ condition. Mutual Exclusion C. No Preemption Hold and Wait D. Circular Wait Which of the following algorithm can result in external fragmentation （碎片）problem? first fit C. best fit next fit D. worst fit Which of the following page replacement algorithm need to clear R bit periodically（周期性）? FIFO B. Second Chance C. Aging D. Working Set Writing commands to the device registers is done in which layers? Interrupt handlers C. Device-independent OS software Device drivers D. User-level I/O software “Device independence” means that devices are accessed dependent of their model and types of physical device. systems that have one set of calls for writing on a file and the console (terminal) exhibit device independence. that files and devices are accessed the same way, independent of their physical nature. None of the above The purpose of the open file call is to ______. search for the specified file in main memory copy the specified file into main memory search for the directory of the file in storage medium fetch the directory of the file into main memory As for MS-DOS/Windows system, the attributes of file are stored in______. file B. directory C. directory entry D. i-node 填空题(共10分，每空1分) Operating syste