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COP4600 FINAL EXAM STUDY GUIDE 2024 (A NEW UPDATED VERSION) LATEST COMPLETE ACTUAL EXAM REAL QUESTIONS AND CORRECT DETAILED ANSWERS (CORRECT VERIFIED ANSWERS) |ALREADY GRADED A+ (REVISED EXAM) $19.99   Añadir al carrito
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COP4600 FINAL EXAM STUDY GUIDE 2024 (A NEW UPDATED VERSION) LATEST COMPLETE ACTUAL EXAM REAL QUESTIONS AND CORRECT DETAILED ANSWERS (CORRECT VERIFIED ANSWERS) |ALREADY GRADED A+ (REVISED EXAM)

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COP4600 FINAL EXAM STUDY GUIDE 2024 (A NEW UPDATED VERSION) LATEST COMPLETE ACTUAL EXAM REAL QUESTIONS AND CORRECT DETAILED ANSWERS (CORRECT VERIFIED ANSWERS) |ALREADY GRADED A+ (REVISED EXAM)

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  • 2 de noviembre de 2024
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  • cop4600 final exam study guide 2024 a new update

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COP4600 FINAL EXAM STUDY GUIDE 2024 (A NEW
UPDATED VERSION) LATEST COMPLETE ACTUAL
EXAM REAL QUESTIONS AND CORRECT DETAILED
ANSWERS (CORRECT VERIFIED ANSWERS)
|ALREADY GRADED A+ (REVISED EXAM)


What must I/O devices be connected to in order to do anything? - ANSWERA computer


What is a port? - ANSWERA set of wires that connects an I/O device and the computer.


A device that allows other devices to hook up to it in turn is said to support what? -
ANSWERDaisy-chained devices


What is a bus? - ANSWERA common set fo wires used by more than one I/O device


If devices connect to ports, what do ports connect to? - ANSWERBuses


What is a controller? - ANSWERThe electronics that manage a port, bus or I/O device


What does the operating system actually talk to? - ANSWERThe device's controller


What is a data in register? - ANSWERAllows the computer to get input from the device


What is a data out register? - ANSWERAllows the computer to send output to the device


What is a status register? - ANSWERIndicates the current state of the device, including
whether the current command has completed, whether the data registers are ready, and
whether there is an error.


What is a control register? - ANSWERA register that is used to send commands to the
device

,What does the interrupt/trap mechanism handle? - ANSWERUser-process calls for I/O,
and notifications for those calls. Notifications from hardware about I/O completion,
memory exceptions, arithmetic exceptions (divide by zero), and privilege exceptions.


What is required in order for direct memory access to work? - ANSWERDevice
controllers must be given their own channel to system memory, with its own control
registers.


What is a device driver? - ANSWERA piece of software intended to handle interfacing
with a particular device's controller.


What are some I/O device characteristics? - ANSWERStream versus block, sequential
versus random, synchronous versus asynchronous, sharable versus dedicated,
read/write versus read-only write-only, speed of operation.


What are the fundamental functions of block devices? - ANSWERRead, write, and seek.


What are fundamental functions of character-stream devices? - ANSWERGet and put
(often still mapped to read and write with bufferring to allow multiple bytes to be read
and written)


What is a socket interface? - ANSWERProvides a file-like metaphor for reading and
writing to a network connection


What are the three main functions of hardware clocks? - ANSWERReport the current ime,
report the elapsed time, and set an interval timer to report in the future.


What are clocks used by the OS for, at a minimum? - ANSWERTo preempt processes,
flush cache buffers, and to report the failure of timed-out network connections.


What is the device status table? - ANSWERA table that is used to keep track of each
device and related pending request queues.

,What is a spool? - ANSWERA special-purpose buffer that serves entire coherent jobs.


What is the print spool? - ANSWERThe OS accepts jobs quickly on the printer's behalf,
and presents them to the printer in order.


What are disks? - ANSWERSecondary storage devices that represent both the effective
bottom of the memory hierarchy and the most obvious I/O devices.


What are the three types of disks? - ANSWERMagnetic disks, optical disks, and solid
state disks.


What are magnetic disks? - ANSWERFixed disks that are made up of a series of plateers.
The platters are divided into circular tracks, and the track are then divided into sectors,
and the collection of tracks at the same distance from the center is referred to as a
cylinder.


What allows the disk to run? - ANSWERA drive motor spins it


What are the two important speed metrics for magnetic disks? - ANSWERTransfer rate
and the random accss time.


What is the transfer rate? - ANSWERThe effective rate of data flow between the disk and
the computer.


What is the random access time? - ANSWEREqual to the seek time plus the rotational
latency.


What is the seek time? - ANSWERThe time is takes to move the disk arm to the right of
the cylinder.


What is the rotational latency? - ANSWERThe time it takes the right sector to rotate to the
disk head.

, Most personal disks nowadays are host attached. What does this mean? - ANSWERATA
in its various forms for magnetic disks and low-end SSDs, PCI Express for high-end
SSDs, USB for low-end external drives, or Thunderbolt for high-end external drives.


How does network attached storage work? - ANSWERBy using standard networking
protocols to provide storage over the network. This typically means NFS/CIFS network
devices or shares.


What is low level formatting? - ANSWERThe process of writing the storage structures
that order the disk at the sector level.


What is the partition referred to where code from is loaded by the chain of bootstrap
programs? - ANSWERBoot partition


What is RAID? - ANSWERRedundant array of independent disks


How do RAID arrays help? - ANSWERThey increase the reliability of data by
implementing redundancy and also increase performance of the data retrieval and
manipulation process by storing it across multiple devices.


How does RAID 0 work? - ANSWERStrips data block-by-block across multiple disks


What are the performance ratings for RAID 0? - ANSWERWrite and Read performance are
theoretically equal to the combined disks, severe decrease in reliability, disk space of all
disks combined.


How does RAID 1 work? - ANSWERMirrors data across multiple disks, writing identical
data to each disk in the array


What are the performance ratings for RAID 1? - ANSWERWrite performance is equal to a
single disk, read performance is equal to RAID 0, all but 1 disk must fail for data to be
lost, disk space of a single disk.


What is the final disk used for in RAID 5 and 6? - ANSWERUsed to store a parity block

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