OSG-I/O_P1

Which of the following is not an operating system?

• Microsoft Office

• Windows

• macOS

• Linux

What is RAID?

• A type of computer virus

• A type of computer hardware

• A data storage technology that combines multiple physical hard drives into a single logical unit for the purposes of data redundancy, performance improvement, or both

• A type of computer network

Which RAID level provides the highest level of data redundancy?

• 1

• 3

• 5

• 7

Which RAID level provides the best performance?

• 0

• 2

• 4

• 6

Which of the following is not a type of RAID level?

• 1

• 3

• 5

• 7

Which RAID level offers both data redundancy and improved performance?

• 0

• 1

• 10

• 11

Which of the following is a disadvantage of using RAID?

• Improved performance

• Increased data redundancy

• Higher cost

• Larger storage capacity

Which of the following is not a component of an operating system?

• Kernel

• Shell

• Device drivers

• Compiler

Consider a disk with 2000 cylinders numbered from 0 to 1999, and a disk queue with the following I/O requests: 132, 94, 170, 105, 180, 168, 20, 89, 115, 190. Implement the SSTF (shortest seek time first) algorithm to service the requests, assuming that the initial position of the disk arm is at cylinder 50. Calculate the total amount of head movement required to service all the requests.

• 200

• 180

• 220

• 240

Consider a disk with 2000 cylinders numbered from 0 to 1999, and a disk queue with the following I/O requests: 132, 94, 170, 105, 180, 168, 20, 89, 115, 190. Implement the Elevator upward algorithm to service the requests, assuming that the initial position of the disk arm is at cylinder 50. Calculate the total amount of head movement required to service all the requests.

• 310

• 300

• 320

• 330