M.Sc. (Electronics) (Semester II) (CBCS) Examination, 2017
REAL TIME OPERATING SYSTEM
Day Date: Friday, 21-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instruction Answer five questions
Question 1 and 2 are compulsory
Attempt any Three from Q.3 to Q.7
Figures to the right indicate full marks.
Q.1 Choose correct answer: 8
Hard real time operating system has jitter than a soft real
Time operating system.
less more equal none of these
Which one of the following is a real time operating system?
RTLinux VxWorks WindowsCE all of these
The multitasking is also called cooperating multitasking
Preemptive multitasking Non-preemptive multitasking
both a b none of these
The priorities of low priority task and high priority task are
Effectively inversed is called
Priority inheritance Priority inversion
Both a and b none of these
Embedded system in which some specific work has to be done in
a specific time period are called
Real-time system Stand-alone system
both a and b none of these
A task is said to in state, if it is waiting for another event.
Waiting Running Ready to Run None of these
specifies the task waiting order and enables task deletion
safety.
Mutex zero either zero or one None of these
Binary semaphore will take the value of
One zero either zero or one None of these
Page 2 of 2
State True or False: 06
Time duration required for scheduling dispatcher to stop one
process and start another is known as process latency.
A task is said to be in running state if it is being executed by the
CPU.
Counting semaphore will have an integer value greater than zero.
Time required for CPU to return to the interrupted code or highest
priority task is called interrupted response time.
The module within the scheduler that performs context switching is
called dispatcher
Event register is a Kernel object to indicate the occurrence of an
event to a task.
Q.2 Answer any two of the following: 10
Compare Hard and Soft Real Time Systems.
Write note on Counting semaphore.
Explain Characteristics of Real-Time operation system.
Write note on Round Robin scheduling algorithm. 04
Q.3 Write a note on Minimum requirement of Microcontroller based
embedded.
08
Write note on Resources, Sharing of resources. 06
Q.4 Explain in detail structure of RTOS. 08
Write a note on concept of Synchronization of Task. 06
Q.5 Explain Intertask Communication. 08
Write note on binary semaphore. 06
Q.6 Write note on POSIX Pthreads. 08
Discuss RTLinux Kernel in detail. 06
Q.7 Design AVR ATmega8L microcontroller based embedded system for
Measurement of wind velocity.
08
Write note on Kernel Objects. 06