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Spring08_Homework1PartA

Spring08_Homework1PartA - Homework1...

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Homework 1 ICS-143, Spring 2008 * Start Early. * Do not hesitate to ask questions. * If you make any assumptions, state them and be brief in your answers. * Hand in your homework to the distribution center before the following due date/time. Part A (77 points): Due 4/23/2008, 5:00pm Questions 1[Chapter 1, 40 points] 1a.  Give one sample application for soft real-time systems and one for hard real-time  systems. (5 points) 1b.  State one essential property of the following types of operating systems: (6 points) 1) Time sharing 2) Real Time 1c.  Which of the following operations are privileged? (4 points) 1) Generating an interrupt 2) Accessing network card buffer 3) Invoking a system call 4) Setting up the timer 1d.  (Page 35, Question 1, Bic) Give examples of semantic gaps that must be bridged by  software, including the OSs at the following levels: CPU (instruction) level, main memory  level, secondary storage level, I/O device level. (5 points) 1e.  (Page 439, Problem 4, Bic) At login time, every user must type in a user name and a  password.  Assume that the average length of the user name and the password is 
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