Correct Answer: To achieve maximum efficiency and reliability a mode of operation known as symmetric multiprocessing is used In essence, with SMP any process or threads can be assigned to any processor
4. What are the four layers that Windows NT have in order to achieve independence?
Correct Answer: 1 Increased speed and memory capacity of microprocessors together with the support for virtual memory and 2 Growth of client server computing
Correct Answer: Paging is solution to external fragmentation problem which is to permit the logical address space of a process to be noncontiguous, thus allowing a process to be allocating physical memory wherever the latter is available
9. Explain the concept of the batched operating systems?
Correct Answer: In batched operating system the users gives their jobs to the operator who sorts the programs according to their requirements and executes them This is time consuming but makes the CPU busy all the time
10. What is Throughput, Turnaround time, waiting time and Response time?
Correct Answer: Throughput : number of processes that complete their execution per time unit Turnaround time : amount of time to execute a particular process Waiting time : amount of time a process has been waiting in the ready queue Response time : amount of time it takes from when a request was submitted until the firstresponse is produced, not output (for time-sharing environment)