Hall Ticket No Question Paper Code: BES214
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
M.Tech II Semester End Examinations (Regular) July, 2018
Regulation: IARE-R16
EMBEDDED REAL TIME OPERATING 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. Briefly discuss several cases in which the number of bytes actually read is less than the amount
requested.
Write the syntax of wait and waitpid function and differentiate between wait and waitpid functions.

2. Write the syntax of open function and explain different constants from the <fcntl.h> header.

Illustrate sharing of open files between parent and child after fork.
UNIT II
3. List and briefly describe different key characteristics of an RTOS.
Illustrate a five-step scenario, how a kernel scheduler might use a task-ready list to move tasks
from the ready state to the running state.
4. What is recursive shared-resource-access synchronization and write the pseudo code for recursively
accessing a shared resource .
Briefly discuss common operations that developers can perform with a task object from within
the application.
UNIT III
5. Explain different functions that are considered part of the set in the general approach to uniform.

Illustrate the concept of uniform I/O driver table by taking an example.
6. Differentiate between character-mode vs. block-mode devices.
Explain different steps that must take place to accomplish uniform I/O operations at the applicationlevel.

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UNIT IV
7. Explain different types of exceptions with real time examples.
List the functions performed by the soft-timer facility and enumerate the model for soft-timer
handling facility by taking an example.
8. Illustrate the process of loading and invoking exception handlers.
Explain different categories of timer-related operations for external software components and
applications through API sets in RTOS.
UNIT V
9. What is TinyOS and explain different components in the architecture of TinyOS.
What is Vx works and list the functionalities of Vx works.
10. List and briefly discuss the features of the system user of to control the tasks.
Explain important blocks of application framework in android OS.