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What is the real time scheduling?

What is the real time scheduling?
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Hard real-time and soft real-time are the types of real time scheduling. Real time 


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A scheduling Algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (lowest priority). The scheduler re-evaluates the process priority for every 'T' time units and decides next process to be scheduled. If the process have no I/O operations and all arrive at time zero, then the scheduler implements .............. criteria. (A) Priority scheduling (B) Round Robin Scheduling (C) Shortest Job First (D) FCFS

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Answer : (B) Round Robin Scheduling

Consider three CPU intensive processes P1, P2, P3 which require 20, 10 and 30 units of time, arrive at times 1, 3 and 7 respectively. Suppose operating system is implementing Shortest Remaining Time first (preemptive scheduling) algorithm, then .............. context switches are required (suppose context switch at the beginning of Ready queue and at the end of Ready queue are not counted). (A) 3 (B) 2 (C) 4 (D) 5

Description : Consider three CPU intensive processes P1, P2, P3 which require 20, 10 and 30 units of time, arrive at times 1, 3 and 7 respectively. Suppose operating system is implementing Shortest Remaining Time first (preemptive scheduling) algorithm, then .............. context switches are required (suppose context switch at the beginning of Ready queue and at the end of Ready queue are not counted). (A) 3 (B) 2 (C) 4 (D) 5

Answer : (A) 3

Which of the following scheduling algorithms may cause starvation? a. First-come-first-served b. Round Robin c. Priority d. Shortest process next e. Shortest remaining time first (1) a, c and e (2) c, d and e (3) b, d and e (4) b, c and d

Description : Which of the following scheduling algorithms may cause starvation? a. First-come-first-served b. Round Robin c. Priority d. Shortest process next e. Shortest remaining time first (1) a, c and e (2) c, d and e (3) b, d and e (4) b, c and d

Answer : Answer: 2

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Answer : Which scheduling policy is most suitable for a time-shared operating system?  Round robin

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Answer : D .All of the above 

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Description : What is the speciality of WINDOWS–NT? (1) supports real–time processing (2) supports LAN and WAN (3) supports Batch processing (4) supports multi–processing

Answer : supports multi–processing

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