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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VII EXAMINATION WINTER 2018
Subject Code:X71105 Date: 26/11/2018
Subject Name: Embedded System
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Compare embedded system and general purpose computers.
03

Define and classify the embedded systems.
04

Explain in detail ARM 3-stage pipelining.
07
Q.2

Briefly explain watchdog timer
03

Briefly discuss applications of embedded systems.
04

Discuss the ARM programmer's model in detail.
07
OR

Draw and discuss the basic block diagram of architectural model of ARM controller.
07
Q.3

Explain interrupt latency.
03

What is software interrupt (SWI).
04

Explain the reasons for Priority Inversion along with solution for it.
07
OR
Q.3

Compare pre-emptive and non pre-emptive scheduling policies
03

Describe the clock system of MSP430 processor.
04

What is DMA? Using diagram show the operation of a DMA controller.
07
Q.4

What is device driver? Explain in brief.
03

Briefly explain Data sharing and deadlocks.
04

Explain device, file and I/O management in RTOS.
07
OR
Q.4

Explain concept of Semaphores.
03

Briefly explain serial bus communication protocols.
04

Discuss Thumb data processing instructions.
07
Q.5

Enlist RTOS task scheduling models.
03

Explain multithreading with example.
04

What are the RTOS security issues, which are the important security function generally found on RTOS?
07
OR
Q.5

Enlist service provided by RTOS.
03

Explain ARM control flow instructions.
04

Write short note on OS security issues.
07