csc 110 ch 8 Exam 2026 Questions and
Answers Graded A+
Hard Disk Drive (HDD) - Correct answer-A storage device that spins platters of
magnetically-coated material under moving read-write heads to store and retrieve
data
Logical Block - Correct answer-Smallest unit of transfer in a disk drive created
during low-level formatting.
Transfer Rate - Correct answer-Speed at which data moves between the disk and
the computer.
Disk Bandwidth - Correct answer-Total bytes transferred divided by total time
from first request to completion.
Seek Time - Correct answer-Time required to move the disk arm to the correct
cylinder.
Rotational Latency - Correct answer-Time for the desired sector to rotate under the
disk head.
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, Positioning Time / Random-Access Time - Correct answer-Seek time + rotational
latency.
Head Crash - Correct answer-Physical contact between disk head and surface
causing failure.
Mean Time to Failure (MTTF) - Correct answer-Average time before a disk fails.
Mean Time to Repair (MTTR) - Correct answer-Average time to repair/replace a
failed disk.
FCFS (First-Come, First-Served) - Correct answer-Serves requests in arrival order.
SSTF (Shortest Seek Time First) - Correct answer-Selects request closest to current
head position.
SCAN (Elevator Algorithm) - Correct answer-Head moves in one direction
servicing requests, then reverses.
C-SCAN (Circular SCAN) - Correct answer-Services only one direction; jumps
back to start without servicing return.
Deadline Scheduler - Correct answer-Linux scheduler using read/write queues to
prevent starvation.
Error Detection - Correct answer-Detects presence of data errors (e.g., parity,
checksums).
©COPYRIGHT 2026, ALL RIGHTS RESERVED 2
Answers Graded A+
Hard Disk Drive (HDD) - Correct answer-A storage device that spins platters of
magnetically-coated material under moving read-write heads to store and retrieve
data
Logical Block - Correct answer-Smallest unit of transfer in a disk drive created
during low-level formatting.
Transfer Rate - Correct answer-Speed at which data moves between the disk and
the computer.
Disk Bandwidth - Correct answer-Total bytes transferred divided by total time
from first request to completion.
Seek Time - Correct answer-Time required to move the disk arm to the correct
cylinder.
Rotational Latency - Correct answer-Time for the desired sector to rotate under the
disk head.
©COPYRIGHT 2026, ALL RIGHTS RESERVED 1
, Positioning Time / Random-Access Time - Correct answer-Seek time + rotational
latency.
Head Crash - Correct answer-Physical contact between disk head and surface
causing failure.
Mean Time to Failure (MTTF) - Correct answer-Average time before a disk fails.
Mean Time to Repair (MTTR) - Correct answer-Average time to repair/replace a
failed disk.
FCFS (First-Come, First-Served) - Correct answer-Serves requests in arrival order.
SSTF (Shortest Seek Time First) - Correct answer-Selects request closest to current
head position.
SCAN (Elevator Algorithm) - Correct answer-Head moves in one direction
servicing requests, then reverses.
C-SCAN (Circular SCAN) - Correct answer-Services only one direction; jumps
back to start without servicing return.
Deadline Scheduler - Correct answer-Linux scheduler using read/write queues to
prevent starvation.
Error Detection - Correct answer-Detects presence of data errors (e.g., parity,
checksums).
©COPYRIGHT 2026, ALL RIGHTS RESERVED 2
