EMBEDDER SYSTEMS PREVIOUS PAPERS

Set No. 4
IV B.Tech II Semester Supplementary Examinations, May/Jun 2007
EMBEDDED SYSTEMS
(Computer Science & Engineering)
Time: 3 hours

Answer any FIVE Questions
All Questions carry equal marks
Max Marks: 80

1. What are the important general requirements of embedded systems? Explain each
one of the requirements and discuss in which application that requirement is more
important.[6+10]
2. Explain the terms: ‘power supply decopling’, ‘open-collector output’, ‘Tristate out-
put’, ‘fan-out’ for TTL logic gates.[4+4+4+4]
3. What are the important features of Assembly Language? Explain the reasons why
Assembly Language programming is preferred for some types of embedded systems.
[8+8]
4. Explain the functions of a scheduler in an RTOS and how does the scheduler car-
ryout those functions.[8+8]
5. How memory management is done by an RTOS? Why is memory management not
used in embedded systems?[8+8]
6. Explain the need for encapsulating semaphores and queues with an example. [16]
7. Explain the di?erences between an ‘Host Computer System’ and a ‘Target System’
in terms of their hardware and software.[8+8]
8. Explain the important features of the following operating systems that are relevant
to embedded applications.

(a) RT Linux
(b) Windows XP
(c) Win CE
(d) Vxworks

Set No. 3


IV B.Tech II Semester Supplementary Examinations, May/Jun 2007
EMBEDDED SYSTEMS
(Computer Science & Engineering)
Time: 3 hours
Answer any FIVE Questions
All Questions carry equal marks
Max Marks: 80

1. Draw the functional blocks of the following embedded systems and brie?y explain
them.

(a) A digital camera
(b) A process control system
(c) A Multimeter
(d) A Handheld computer [4+4+4+4]

2. Explain the terms: ‘power supply decopling’, ‘open-collector output’, ‘Tristate out-
put’, ‘fan-out’ for TTL logic gates.[4+4+4+4]

3. Explain the term ‘Interrupt Latency’. Discuss various measures to reduce the
interrupt latency in embedded applications.[8+8]

4. Explain the functions of a scheduler in an RTOS and how does the scheduler car-
ryout those functions.[8+8]

5. What are events? Explain the role of events in RTOS.[8+8]

6. Explain the design details of an embedded system with some speci?c example. [16]

7. Explain the di?erences between an ‘Host Computer System’ and a ‘Target System’
in terms of their hardware and software.[8+8]

8. Explain the important features of the following operating systems that are relevant
to embedded applications.
(a) RT Linux
(b) Windows XP
(c) Win CE
(d) Vxworks

Set No. 2


IV B.Tech II Semester Supplementary Examinations, May/Jun 2007
EMBEDDED SYSTEMS
(Computer Science & Engineering)
Time: 3 hours
Answer any FIVE Questions
All Questions carry equal marks
Max Marks: 80


1. Explain the general features of microprocessors and microcontrollers by giving one
example for each. Discuss why micro controllers are preferred for embedded systems.
[16]

2. What is a Computer Bus? Explain how the bus signals are used to interface memory
to the CPU in a computer.

3. Explain the following
(a) Interrupt handler
(b) Interrupt vector table
(c) Edge and Level triggered interrupts
(d) Interrupt priority

4. Explain the functions of a scheduler in an RTOS and how does the scheduler carry out those functions.[8+8]

5. Why do we need timer functions in RTOS? Brie?y discuss how they are provided.
[8+8]

6. Explain the design details of an embedded system with some speci?c example. [16]

7. Explain the di?erences between an ‘Host Computer System’ and a ‘Target System’
in terms of their hardware and software.[8+8]

8. Explain the important features of the following operating systems that are relevant
to embedded applications.
(a) RT Linux
(b) Windows XP
(c) Win CE
(d) Vxworks

Set No. 1


IV B.Tech II Semester Supplementary Examinations, May/Jun 2007
EMBEDDED SYSTEMS
(Computer Science & Engineering)
Time: 3 hours
Answer any FIVE Questions
All Questions carry equal marks
Max Marks: 80



1. Explain the di?erent types of memory devices used in embedded systems with their
relative merits and demerits.

2. Explain the terms: ‘power supply decopling’, ‘open-collector output’, ‘Tristate out-
put’, ‘fan-out’ for TTL logic gates. [4+4+4+4]

3. What are the important features of Assembly Language? Explain the reasons why
Assembly Language programming is preferred for some types of embedded systems.
[8+8]

4. Give justi?cations for using a multitasking RTOS for embedded systems. Explain
the di?erent states of a task in the system with the help of a state transition diagram.
[8+8]

5. What are the rules to be followed by the interrupt routines in RTOS? Why? [8+8]

6. Discuss various methods adopted to reduce power consumption in embedded applications.[16]

7. Explain the di?erences between an ‘Host Computer System’ and a ‘Target System’
in terms of their hardware and software.[8+8]

8. Explain the important features of the following operating systems that are relevant
to embedded applications.
(a) RT Linux
(b) Windows XP
(c) Win CE
(d) Vxworks