help pleasee!!

1. How does a Real-time system differ from other systems? 2. What is the difference between a hard and soft deadline? 3. Define CPU utilization, throughput, turnaround time, waiting time and response time. What is the significance of response time? 4. What does it mean for the dispatcher to preempt a process? 5. What are the advantages of the multilevel feedback algorithm vs. the multilevel queue algorithm? What is the difference between preemptive and non-preemptive scheduling? 6. In a Uniprocessor scheduler what is the best algorithm? Why? 7. What are some of the concerns about multiprocessor scheduling? 8. How would CPU utilization be used as a performance criterion in a scheduling algorithm