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Previous Year Exam Questions for Embedded Computing Systems - ECS of 2017 - NITRKL by SANTOSH KUMAR PRADHAN

  • Embedded Computing Systems - ECS
  • 2017
  • PYQ
  • NIT ROURKELA - NITRKL
  • Electronics and Communication Engineering
  • B.Tech
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ECE DEPARTMENT, NIT ROURKELA MID-Semester Examination, Spring 2018 Course Title: Embedded Computing Systems Maximum Marks: 60 Course id: EC 424 Time: 2 Hours (Answer all the questions. Figures in the right hand margin indicate marks. Brevity without cut down of major content is welcome.) 1. [2 × 10] a) Name three application domains of embedded systems with examples. Include a justification. b) Conduct the case study for a digital camera application in terms of processing speed, architecture requirement, memory requirement etc. and hence suggest an appropriate computing platform. c) List and explain briefly three main characteristics of an embedded system that distinguish such systems from other computing systems? d) At what stage of design methodology would we choose a programming language and test our design for functional correctness. e) What is meant by design metric? Mention three important design metrics that need to be considered for embedded system design. f) Briefly describe the distinction between behavioral specification and logic specification. g) Draw (i) the transistor –level circuit schematic for a two input NAND gate; and (ii) the top-down view of the circuit on an IC( make your layout as compact as possible.) h) Differentiate between open-looped control system and closed-looped control system? Why we are more concerned with closed-looped control systems? i) Explain the terms repeatability, reproducibility and stability in digital control perspective used in embedded systems? j) What are watchdog timers? How do they help in designing real time tasks? 2. [4 +7 +3] a) Bring out the differences between GPOS and RTOS b) Compare RMS and EDF scheduling based upon their relative advantages and disadvantages. For the set of tasks given in Table 1; perform EDF scheduling. Table 1 Tasks Execution Time Periodicity T1 T2 T3 T4 1 2 4 3 5 10 15 15 1

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c) Explain CAN protocol briefly. Which feature of it makes it suitable for embedded applications, particularly automotive? 3. [8] 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 as well as sequence diagram. Clearly identify all the blocks and actions used in this diagram. 4. [8 + 2] A. List and describe eight parts of a closed loop control system. Give a real life example of each. B. Bring out advantages of embedded/digital control implementations. 5. [2 × 4] Distinguish between a. Laxity and tardiness b. Hard and firm real time tasks c. Quantization and Overflow Effects in digital control algorithms d. RAD and Spiral Embedded Life Cycle/Design Process model 2

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