Consider a Disk Queue Holding Requests to the Following Cylinders

question 30

Multiple Choice

Consider a disk queue holding requests to the following cylinders in the listed order: 210, 67, 11, 99, 87, 90, 19, 150. Using the C-SCAN scheduling algorithm, what is the order that the requests are serviced, assuming the disk head is at cylinder 88 and moving upward through the cylinders?

• A) 87 - 90 - 99 - 67 - 19 - 11 - 150 - 210
• B) 210 - 67 - 11 - 99 - 87 - 90 - 19 - 150
• C) 90 - 99 - 150 - 210 - 11 - 19 - 67 - 87
• D) 90 - 99 - 150 - 210 - 87 - 67 - 19 - 11

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Definitions:

Operating States

The various conditions or modes in which a device or system can exist, such as on, off, standby, or fault.

Control Coil

An electromagnetic coil used in electrical engineering to control the operation of devices, typically in relays or contactors.

Relay Contact

A component in a relay that opens or closes the electrical circuit it controls, acting as the switching element triggered by the relay.

Ice-cube Relays

Small, plug-in electromechanical relays that resemble the size and shape of an ice cube, used for various control applications.