Flashcards
SCIA 360 Chapter 7
Cards in this deck (20)
- 1____ peripheral devices are assigned to only one job at a time. a. Dedicated b. Shared c. Virtual d. Statica. Dedicated
- 2The USB controller assigns bandwidth to each device depending on its priority. The ____ priority is assigned to real-time exchanges where no interruption in the data flow is allowed, such as video or sound data. a. highest b. medium c. lowest d. standarda. highest
- 3The I/O ____ allocates the devices, control units, and channels. a. scheduler b. traffic controller c. device handler d. directora. scheduler
- 4The number of characters that can be recorded per inch on a magnetic tape is determined by the ____ of the tape. a. width b. length c. density d. parityc. density
- 5Transfer rate of a magnetic tape is measured in inches per second (ips) using the following formula: transfer rate = density * ____. a. block size b. average access time c. transport speed d. sector sizec. transport speed
- 6If 2.5 minutes is the maximum access time for a magnetic tape, ____ is the average access time. a. 0.5 minutes b. 1 minute c. 1.25 minutes d. 2 minutesc. 1.25 minutes
- 7Of the three components of access time in a movable-head DASD, ____ is the slowest. a. seek time b. search time c. transfer time d. delay timea. seek time
- 8____ time is the time required to move the arm of a movable-head magnetic drive into position over the proper track. a. Search b. Seek c. Transfer d. Accessb. Seek
- 9____ uses the same underlying philosophy as shortest job next, where the shortest jobs are processed first and longer jobs are made to wait. a. LOOK b. FCFS c. SSTF d. SCANc. SSTF
- 10____ is a way to optimize search times on hard disk drives by ordering the requests once the read/write heads have been positioned. a. Rotational ordering b. SSTF c. C-SCAN d.LOOK and SCANa. Rotational ordering
- 11The advent of optical discs was made possible by developments in ____ technology. a. magnetic b. laser c. storage d. siliconeb. laser
- 12On an optical disc, all sectors are ____. a. of varying sizes depending upon where you are on the disc b. larger as you move to the edge c. smaller as you move to the edge d. of the same size throughout the discd. of the same size throughout the disc
- 13The data-transfer rate for an optical disc is measured in ____ per second and refers to the speed at which massive amounts of data can be read from the disc. a. kilobytes b. megabytes c. gigabytes d. terabytesb. megabytes
- 14To put data on an optical disc requires a high-intensity laser beam, which burns indentations, called pits, and flat areas, called ____. a. lands b. valleys c. hills d. lakesa. lands
- 15A dual-layer, single-sided DVD can hold the equivalent of ____ CDs. a. 3 b. 8 c. 13 d. 19c. 13
- 16To write data to flash memory, a relatively high voltage is sent through one transistor, called the ____, then through a metal oxide layer and into a second transistor called the control gate, where the charge is stored in a cell until it’s erased. a. parallel port b. floating gate c. pit d. crystalline portb. floating gate
- 17____ control the transfer of information between the disk drives and the rest of the computer system. a. System controllers b. Disk drive controllers c. System interfaces d. Disk drive interfacesd. Disk drive interfaces
- 18The ____ is a hardware flag that must be tested by the CPU to determine when a device has completed an operation. a. Channel Interrupt Word b. Channel Status Word c. Device Status Word d. Device Polling Wordb. Channel Status Word
- 19A ____, used in RAID Level 2, is a coding scheme that adds extra, redundant bits to the data and is therefore able to correct single-bit errors and detect double-bit errors. a. Synch code b. Hamming code c. Parity code d. Redundancy codeb. Hamming code
- 20RAID level ____ requires two different parity calculations. a. 2 b. 3 c. 5 d. 6d. 6
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- SCIA 360 Flashcards on SCIA 360 Chapter 7, created by Tyler Rock on 09/04/2019.
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