INSTITUTE OF AERONAUTICAL ENGINEERING
(AUTONOMOUS)
Code No: BES214 MODEL QUESTION PAPER - I
M-Tech I Semester Regular Examinations, February 2017 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. (a)Define RTOS. What are the key characteristics of an RTOS
[7M] (b) Explain file I/O functions: Lseek, open, Read, Write.
[7M]
2. (a ) What is a kernel. Explain the Kernel services in an operating system
[7M]
(b) What are OS services? Explain the structures of user and supervisory mode
[7M]
UNIT II
3. (a) Explain the scheduling algorithms to a weighted round robin approach with an
example? [7M]
(b) What is meant by scheduling mechanism? List any 4 scheduling algorithms and explain one of them with example? [7M]
4. (a) What are the different types of scheduling strategies used in RTOS? Explain briefly?
[7M]
(b) Define scheduler. Explain any scheduling algorithm?
[7M]
UNIT III
5. (a) Define scheduler. Explain any scheduling algorithm.
[7M] (b) Define Semaphore. Explain the uses of Semaphore
[7M]
6. (a) Explain the following (i) Dead lock
(ii)Message queue
[7M]
(b) Define the table for kernel services in an operating system with functions and actions [7M]
UNIT IV
7. (a) What are exceptions and interrupts? Explain the applications of exceptions and interrupts [7M]
(b) Explain the steps in servicing the timer interrupt [7M]
8.(a) Explain the Interrupt service routines in an RTOS [7M]
(b) Explain the following (i) Recursive locking
(ii)Pipe states [7M]
INSTITUTE OF AERONAUTICAL ENGINEERING
(AUTONOMOUS)
Code No: BES214 MODEL QUESTION PAPER - I
M-Tech I Semester Regular Examinations, February 2017 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 V
9. (a) What are the important features of Vx Works for a sophisticated RTOS [7M]
(b).Define porting of RT Linux .Discuss general requirements of processor to port RT Linux
along with hardware/software architecture [7M]
10.(a)Explain the following
(i) Memory layout in Vx Works
(ii) Task Priority levels in Vx Works [7M]
(b) Illustrate two examples for RTOS Image Processing [7M]
