function of os make the computer system convenient to use use the hardware in effective manner allocate resource control the execution of intrustion categories os real time system-extremely fast system run in critical envinronment ,nid 100percent of response and time,eg: air traffic control such as radar system . interactive system- user direct interact wit system by enter command via keyboard.system provide immediate feedback to user. eg:auto teller machine system provide immediate cash and transaction detail to ATM users. hybrid system- combined with interactive system and batch system,appear wit interactive system to user access and provide immediate feedback but actually run batch in background,many large computer use hybrid system embedded system-a system added into other product to add features and enchance performance. 4 condition of deadlock mutual exclusion hold and wait circular wait no preemption
Posted on: Thu, 04 Sep 2014 12:01:55 +0000
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