COSC 4330 QUIZ #1 February 8, 1995 Name: ____________________________________________________ Score: _____ CLOSED BOOK. You can have one sheet of notes. Each question is worth 20 points. 1. What is a privileged instruction? (10 points) What would happen if physical I/O instructions were not privileged instructions? (10 points) 2. What is the difference between a real-time system and a time- sharing system? 3. What are the main advantage and main disadvantage of delaying disk writes? 4. What do most diskless workstations to reduce the load of their file servers? 5. Which system events can bring a process: (a) from the running state to the ready state? (10 points) (b) from the waiting state to the waiting suspended state? (10 points) COSC 4330 QUIZ #1 February 8, 1995 Name: ____________________________________________________ Score: _____ CLOSED BOOK. You can have one sheet of notes. Each question is worth 20 points. 1. What is a privileged instruction? (10 points) Why should physical I/O instructions always be privileged instructions? (10 points) 2. What are the main advantage and disadvantage of reading ahead data from the disk? 3. What is the difference between a real-time system and a time- sharing system? 4. What do most diskless workstations to reduce the load of their file servers? 5. Which system events can bring a process: (a) from the waiting state to the ready state? (10 points) (b) from the running state to the waiting state? (10 points) --IMPORTANT----IMPORTANT----IMPORTANT----IMPORTANT----IMPORTANT-- Please do not try to answer these questions by yourself BEFORE having a clear idea of what's on the test for which you are studying. Materials covered in each test DO VARY from semester to semester because the pace of the course can change, some materials are be added and other deleted almost every semester. ----------------------------------------------------------------