B.E. 4/4 (CSE) II-Semester (Main) Examination, April / May 2013
Time : 3 Hours
Subject : Real Time Systems (Elective-III)
Max. Marks: 75
Note: Answer all questions of Part - A and answer any five questions from Part-B. PART – A (25 Marks) 1. Explain the reference model of real time system. 2. What is the difference between a performance constraint and a behavioral constraint in a real time system? 3. Define the term : (a) Scheduling points (b) Proficient scheduler (c) Preemptive scheduler 4. What are the drawbacks of earliest deadline first (EDF) scheduling? 5. List out the features of real time operating system. 6. Write about the soft real time communication in LAN. 7. How are deadlocks, unbounded priority inversions and chain blocking prevented using PCP? 8. Explain the differences between a system call and a function call. What problems may arise if a system call is made indistinguishable from a function call? 9. Explain the important differences between different types of real time systems. 10. What is the difference between synchronous and asynchronous I/O? Which one is better suited for use in real-time applications? PART – B (50 Marks) 11. Explain the characteristics of real time systems in detail. 12. Write about the classification of real time task scheduling algorithms and explain the algorithm. 13. Explain the different types of priority inversions that a task might suffer due to a lower priority task when the priority ceiling protocol is used to share critical resources among a set of real time task. 14. Explain in detail about UNIX based real time operating systems. 15. What do you understand by QoS routing? Explain the different types of QoS routing algorithms. 16. Explain the various concurrency control issues in a real time system. 17. Explain the scheduling mechanisms on internet.
... and bottom-up parse of the sentence "The Odd man cried". 13.What is transition Network? Explain ATN with example. 14.(a) Explain shift reduce parser.
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