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AndrewTrieu
2023-02-05 16:53:31 +02:00
committed by Andrew Trieu
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CT30A3370 Operation Systems and System Programming/Weekly assignments/Assignment1/Submissions/Trieu Trieu/Feedback/Feedback comments.html Normal file
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<p dir="ltr" style="text-align: left;"></p><p>Please check the answers for Q4 &amp; Q5<br>4)The two categories of services and functions provided by an operating system are: User services and system services</p>
<p>User services provides functions that are helpful to users, including user interface, program execution, I/O operations, file system operations, communication, and error detection</p>
<p>System services are not meant to help users but to ensure that the system itself runs efficiently.&nbsp; Systems with multiple users can gain efficiency by sharing the computer resources among the users. System services include resource allocation, accounting, protection and security.<br><span style="font-family: Montserrat, -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, &quot;Helvetica Neue&quot;, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;;"><br>5) Three general methods of passing parameters are</span></p>
<p>a. Pass parameters in registers</p>
<p>b. Registers pass starting addresses of blocks of parameters</p>
<p>c. Parameters can be placed, or pushed, onto the stack by the program, and popped off the stack by the operating system&nbsp;</p><br><p></p>
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