Suppose the head of a moving-head disk with 200 tracks numbered 0 to 199 is currently serving a request at track 99 and has just finished a request at track 125. The queue of outstanding requests in FIFO order is: 5, 95, 75, 100,30 and 155. What is the total number of head movements (in cylinders) for the following disk-scheduling algorithms?   FCFS Scheduling                                                                                                                                  SCAN Scheduling                                                                                                                         SSTF Scheduling

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A: Dear Student, The answer to your question with required explanation is given below -

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Q: How many data block accesses on the average are needed to fetch a record by using linear search?

A: A linear search or sequential search is a method for finding an element within a list.

Fundamentals of memory

A collection of connected storage devices form the memory unit. It is a space to store data and instructions required for processing. Information is stored in a memory unit in the form of bits. There are two types of memory namely: