Hall Ticket No Question Paper Code: BES214
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
M.Tech II Semester End Examinations (Regular) July, 2017
Regulation: IARE-R16
EMBEDDED REAL TIME OPERATING SYSTEMS
(Embedded Systems)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Write the syntax of lseek function and explain different values of the whence argument.

Write the program to illustrate the concept of race condition and further write the program to
il-lustrate avoiding race condition.
2. Write a program to create a file with a hole in it.
Illustrate the relationship among six exec functions. Explain each function in detail.
UNIT II
3. Explain High-level view of an RTOS, its kernel, and other components found in embedded systems.

Illustrate the usage of different types of semaphores to address common synchronization design
requirements effectively.
4. Explain different types of scheduling algorithms.
Illustrate a typical Finite State Machine for task execution states, with brief descriptions of state
transitions.
UNIT III
5. Explain different Steps must take place to accomplish uniform I/O operations at the applicationlevel.

Illustrate the process of servicing a write operation for a block-mode device.
6. Describe the relationship between the I/O API set and driver internal function set.

Explain memory-mapped I/O device address space with the help of diagram.
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UNIT IV
7. Illustrates a general priority framework observed in most embedded computing architectures.

Explain different steps in servicing the timer interrupt.
8. What is a spurious interrupt Explain different types of triggering mechanisms to raise interrupts
to the core processor.
List the issues are associated with the timing wheel approach and discuss the solutions for the
same.
UNIT V
9. What is RT linux and list the functionalities of RT linux?
List and briefly discuss the features of the system user of to control the tasks.
10. What is Vx works and list the functionalities of Vx works?
Explain different components in software stack of different layers in android architecture.