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Previous Year Exam Questions for Embedded Computing Systems - ECS of 2018 - NITRKL by SANTOSH KUMAR PRADHAN

  • Embedded Computing Systems - ECS
  • 2018
  • PYQ
  • Electronics and Communication Engineering
  • B.Tech
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ECE DEPARTMENT, NITR Mid-Semester Examination, spring 2019 Course Title: Embedded Computing Systems; Course id: EC 424 Maximum Marks: 100 Time: 2Hours (Answer all the questions. Figures in the right hand margin indicate marks. Brevity without cut down of major content is welcome. Symbols used throughout carry usual meaning. State assumptions clearly in choosing any component value or data if not specified) 1. a) b) c) d) e) 2. a. b. 3. A. B. C. 4. a) [2 × 5] Name three consumer electronics products that have embedded systems; include a justification. Mention various design metrics that need to be considered for Embedded System design. OS functions as a ‘Transformer’ and also as an ‘Effective Scheduler’. How? Name at least 5 (five) devices in which you have seen USB ports. Which of these ports are hosts and which of them are devices? What are the advantages and risks in using open source RTOS? [8 + 2] Draw block schematic for an automobile cruise controller in closed loop system. Clearly identify each input. Briefly explain Bring out advantages of embedded control implementations. [2 +4 + 4] Why is power optimization an important issue in embedded system design? Enumerate various factors on which it depends. What is cosimulation and how is it different from simulation of hardware and software systems? Bring out the differences between GPOS and RTOS . [4 + 2 +4] Explain the terms quantization and overflow in the digital control perspective used in embedded systems? b) Distinguish between Hard and firm real time tasks with suitable examples. c) Sketch a block diagrammatic representation of spiral model used for embedded system design life cycle. Briefly explain. Compare the advantages vis-à-vis disadvantages of this model with waterfall model 1

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5. a) Consider three periodic tasks with priorities, periods and execution time as given in Table: 1. Draw Gantt Charts corresponding to how these tasks will be scheduled, ass uming that all the jobs have same release time. Schedule the tasks to meet their deadlines with preemption. Table:1 Tasks T1 T2 T3 Priority 1 2 3 Period 7 17 24 CPU burst 2 4 8 b) Show how a Set-Speed command flows through refined class structure described in Fig. 1, moving from a change on the front panel to the required changes on the train: Show it in the form of a collaboration diagram. Clearly identify all the blocks and corresponding actions used in this diagram. 2

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