Top 150+ Solved Embedded Real Time Operating System MCQ Questions Answer
Q. Time duration required for scheduling dispatcher to stop one process and start another is known as ____________
a. process latency
b. dispatch latency
c. execution latency
d. interrupt latency
Q. Time required to synchronous switch from the context of one thread to the context of another thread is called?
a. a) threads fly-back time
b. b) jitter
c. c) context switch time
d. d) none of the mentioned
Q. Which one of the following is a real time operating system?
a. a) RTLinux
b. b) VxWorks
c. c) Windows CE
d. d) All of the mentioned
Q. VxWorks is centered around ___________
a. a) wind microkernel
b. b) linux kernel
c. c) unix kernel
d. d) none of the mentioned
Q. Preemptive, priority based scheduling guarantees ____________
a. a) hard real time functionality
b. b) soft real time functionality
c. c) protection of memory
d. d) none of the mentioned
Q. What is Event latency?
a. a) the amount of time an event takes to occur from when the system started
b. b) the amount of time from the event occurrence till the system stops
c. c) the amount of time from event occurrence till the event crashes
d. d) the amount of time that elapses from when an event occurs to when it is service
Q. Real time systems need to __________ the interrupt latency.
a. minimize
b. maximize
c. not bother about
d. none of the mentioned
Q. The amount of time required for the scheduling dispatcher to stop one process and start another is known as ______________
a. a) event latency
b. b) interrupt latency
c. c) dispatch latency
d. d) context switch
Q. The most effective technique to keep dispatch latency low is to ____________
a. a) provide non preemptive kernels
b. b) provide preemptive kernels
c. c) make it user programmed
d. d) run less number of processes at a time
Q. Antilock brake systems, flight management systems, pacemakers are examples of
a. a) safety critical system
b. b) hard real time system
c. c) soft real time system
d. d) safety critical system and hard real time system
Q. In real time operating system ____________
a. a) all processes have the same priority
b. b) a task must be serviced by its deadline period
c. c) process scheduling can be done only once
d. d) kernel is not required
Q. In a real time system the computer results ____________
a. a) must be produced within a specific deadline period
b. b) may be produced at any time
c. c) may be correct
d. d) all of the mentioned
Q. Earliest deadline first algorithm assigns priorities according to ____________
a. a) periods
b. b) deadlines
c. c) burst times
d. d) none of the mentioned
Q. A process P1 has a period of 50 and a CPU burst of t1 = 25, P2 has a period of 80 and a CPU burst of 35. The total CPU utilization is ____________
a. a) 0.90
b. b) 0.74
c. c) 0.94
d. d) 0.80