ppose that a disk drive has 5,000 cylinders, numbered 0 to 4999. The drive is currently serving a request at cylinder 133, and the previous request was at cylinder 115. The queue of pending requests, in FIFO order, is:76,1460, 903, 1764, 938, 1499, 1012,1740,120. Starting from the current head position, what is the total distance (in cylinders) that the disk arm moves to satisfy all the pending requests for each of the following disk-scheduling algorithms? (a) FCFS (b).SSTF (c) SCAN (d) LOOK (e) C-SCAN (f) C-LOOK

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Hash Table

A hash table also called a hash map, is a data structure that maps key-value pairs. The hash table can be used in complex systems to provide fast access and compact storage. A hash table is a structure that stores data in an abstract data type kind of associative array. It keeps data in an array format, with a distinct index value for every data value. If the index of the required data is known, then the data can be accessed very easily.