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rtos objective type questions and answers pdf

This set of 1000+ Operating System MCQs focuses on “Real Time System – Implementing RT Operating Systems”

1) The disadvantage of real addressing mode is :
a) there is a lot of cost involved
b) time consumption overhead
c) absence of memory protection between processes
d) restricted access to memory locations by processes

Answer : c

2) Preemptive, priority based scheduling guarantees :
a) hard real time functionality
b) soft real time functionality
c) protection of memory
d) None of these
View Answer

Answer : b

3) Real time systems must have :
a) preemptive kernels
b) non preemptive kernels
c) a or b
d) neither a nor b
View Answer

Answer : a

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4) Event latency is :
a) the amount of time an event takes to occur from when the system started
b) the amount of time from the event occurance till the system stops
c) the amount of time from event occurance till the event crashes
d) the amount of time that elapses from when an event occurs to when it is serviced.

Answer : d

5) Interrupt latency refers to the period of time :
a) from the occurance of an event to the arrival of an interrupt
b) from the occurance of an event to the servicing of an interrupt
c) from arrival of an interrupt to the start of the interrupt service routine
d) None of these

Answer : c

6) Real time systems need to __________ the interrupt latency.
a) minimize
b) maximize
c) not bother about
d) None of these

Answer : a

7) The amount of time required for the scheduling dispatcher to stop one process and start another is known as ______________.
a) event latency
b) interrupt latency
c) dispatch latency
d) context switch

Answer : c

8) The most effective technique to keep dispatch latency low is to :
a) provide non preemptive kernels
b) provide preemptive kernels
c) make it user programmed
d) run less number of processes at a time

Answer : b

9) Priority inversion is solved by use of _____________.
a) priority inheritance protocol
b) two phase lock protocol
c) time protocol
d) All of these
View Answer

Answer : a