CEA 201 COMPREHENSIVE QUESTIONS AND
ANSWERS SET A+
✔✔B - ✔✔The _________ exchanges data with the processor synchronized to an
external clock signal and running at the full speed of the processor/memory bus without
imposing wait states.
A. DDR-DRAM
B. SDRAM
C. CDRAM
D. None of the above
✔✔C - ✔✔________ can send data to the processor twice per clock cycle.
A. CDRAM
B. SDRAM
C. DDR-DRAM
D. RDRAM
✔✔A - ✔✔__________ increases the data transfer rate by increasing the operational
frequency of the RAM chip and by increasing the prefetch buffer from 2 bits to 4 bits per
chip.
A. DDR2
B. RDRAM
C. CDRAM
D. DDR3
✔✔C - ✔✔________ increases the prefetch buffer size to 8 bits.
A. CDRAM
B. RDRAM
C. DDR3
D. All of the above
✔✔A - ✔✔Theoretically, a DDR module can transfer data at a clock rate in the range of
__________ MHz.
,A. 200 to 600
B. 400 to 1066
C. 600 to 1400
D. 800 to 1600
✔✔B - ✔✔A DDR3 module transfers data at a clock rate of __________ MHz.
A. 600 to 1200
B. 800 to 1600
C. 1000 to 2000
D. 1500 to 3000
✔✔D - ✔✔The ________ enables the RAM chip to preposition bits to be placed on the
data bus as rapidly as possible.
A. Flash memory
B. Hamming code
C. RamBus
D. Buffer
✔✔T - ✔✔Magnetic disks are the foundation of external memory on virtually all
computer systems.
(T/F)
✔✔F - ✔✔During a read or write operation, the head rotates while the platter beneath it
stays stationary.
(T/F)
✔✔F - ✔✔The width of a track is double that of the head.
(T/F)
✔✔T - ✔✔There are typically hundreds of sectors per track and they may be either fixed
or variable lengths.
(T/F)
✔✔T - ✔✔A bit near the center of a rotating disk travels past a fixed point slower than a
bit on the outside.
(T/F)
✔✔F - ✔✔The disadvantage of using CAV is that individual blocks of data can only be
directly addressed by track and sector.
(T/F)
✔✔T - ✔✔A removable disk can be removed and replaced with another disk.
(T/F)
,✔✔T - ✔✔The head must generate or sense an electromagnetic field of sufficient
magnitude to write and read properly.
(T/F)
✔✔F - ✔✔The transfer time to or from the disk does not depend on the rotation speed
of the disk.
(T/F)
✔✔T - ✔✔RAID is a set of physical disk drives viewed by the operating system as a
single logical drive.
(T/F)
✔✔T - ✔✔RAID level 0 is not a true member of the RAID family because it does not
include redundancy to improve performance.
(T/F)
✔✔F - ✔✔Because data are striped in very small strips, RAID 3 cannot achieve very
high data transfer rates.
(T/F)
✔✔T - ✔✔The SSDs now on the market use a type of semiconductor memory referred
to as flash memory.
(T/F)
✔✔F - ✔✔SSD performance has a tendency to speed up as the device is used.
(T/F)
✔✔T - ✔✔Flash memory becomes unusable after a certain number of writes.
(T/F)
✔✔C - ✔✔Greater ability to withstand shock and damage, improvement in the
uniformity of the magnet film surface to increase disk reliability, and a significant
reduction in overall surface defects to help reduce read-write errors, are all benefits of
___________.
a. magnetic read and write mechanisms
b. platters
c. the glass substrate
d. a solid state drive
✔✔B - ✔✔Adjacent tracks are separated by _________.
a. sectors
b. gaps
c. pits
d. heads
, ✔✔C - ✔✔Data are transferred to and from the disk in __________.
a. tracks
b. gaps
c. sectors
d. pits
✔✔D - ✔✔In most contemporary systems fixed-length sectors are used, with
_________ bytes being the nearly universal sector size.
a. 64
b. 128
c. 256
d. 512
✔✔A - ✔✔Scanning information at the same rate by rotating the disk at a fixed speed is
known as the _________.
a. constant angular velocity
b. magnetoresistive
c. rotational delay
d. constant linear velocity
✔✔B - ✔✔The disadvantage of _________ is that the amount of data that can be stored
on the long outer tracks is only the same as what can be stored on the short inner
tracks.
a. SSD
b. CAV
c. ROM
d. CLV
✔✔A - ✔✔A __________ disk is permanently mounted in the disk drive, such as the
hard disk in a personal computer.
a. nonremovable
b. movable-head
c. double sided
d. removable
✔✔C - ✔✔When the magnetizable coating is applied to both sides of the platter the disk
is then referred to as _________.
a. multiple sided
b. substrate
c. double sided
d. all of the above
✔✔D - ✔✔The set of all the tracks in the same relative position on the platter is referred
to as a _________.
a. floppy disk
ANSWERS SET A+
✔✔B - ✔✔The _________ exchanges data with the processor synchronized to an
external clock signal and running at the full speed of the processor/memory bus without
imposing wait states.
A. DDR-DRAM
B. SDRAM
C. CDRAM
D. None of the above
✔✔C - ✔✔________ can send data to the processor twice per clock cycle.
A. CDRAM
B. SDRAM
C. DDR-DRAM
D. RDRAM
✔✔A - ✔✔__________ increases the data transfer rate by increasing the operational
frequency of the RAM chip and by increasing the prefetch buffer from 2 bits to 4 bits per
chip.
A. DDR2
B. RDRAM
C. CDRAM
D. DDR3
✔✔C - ✔✔________ increases the prefetch buffer size to 8 bits.
A. CDRAM
B. RDRAM
C. DDR3
D. All of the above
✔✔A - ✔✔Theoretically, a DDR module can transfer data at a clock rate in the range of
__________ MHz.
,A. 200 to 600
B. 400 to 1066
C. 600 to 1400
D. 800 to 1600
✔✔B - ✔✔A DDR3 module transfers data at a clock rate of __________ MHz.
A. 600 to 1200
B. 800 to 1600
C. 1000 to 2000
D. 1500 to 3000
✔✔D - ✔✔The ________ enables the RAM chip to preposition bits to be placed on the
data bus as rapidly as possible.
A. Flash memory
B. Hamming code
C. RamBus
D. Buffer
✔✔T - ✔✔Magnetic disks are the foundation of external memory on virtually all
computer systems.
(T/F)
✔✔F - ✔✔During a read or write operation, the head rotates while the platter beneath it
stays stationary.
(T/F)
✔✔F - ✔✔The width of a track is double that of the head.
(T/F)
✔✔T - ✔✔There are typically hundreds of sectors per track and they may be either fixed
or variable lengths.
(T/F)
✔✔T - ✔✔A bit near the center of a rotating disk travels past a fixed point slower than a
bit on the outside.
(T/F)
✔✔F - ✔✔The disadvantage of using CAV is that individual blocks of data can only be
directly addressed by track and sector.
(T/F)
✔✔T - ✔✔A removable disk can be removed and replaced with another disk.
(T/F)
,✔✔T - ✔✔The head must generate or sense an electromagnetic field of sufficient
magnitude to write and read properly.
(T/F)
✔✔F - ✔✔The transfer time to or from the disk does not depend on the rotation speed
of the disk.
(T/F)
✔✔T - ✔✔RAID is a set of physical disk drives viewed by the operating system as a
single logical drive.
(T/F)
✔✔T - ✔✔RAID level 0 is not a true member of the RAID family because it does not
include redundancy to improve performance.
(T/F)
✔✔F - ✔✔Because data are striped in very small strips, RAID 3 cannot achieve very
high data transfer rates.
(T/F)
✔✔T - ✔✔The SSDs now on the market use a type of semiconductor memory referred
to as flash memory.
(T/F)
✔✔F - ✔✔SSD performance has a tendency to speed up as the device is used.
(T/F)
✔✔T - ✔✔Flash memory becomes unusable after a certain number of writes.
(T/F)
✔✔C - ✔✔Greater ability to withstand shock and damage, improvement in the
uniformity of the magnet film surface to increase disk reliability, and a significant
reduction in overall surface defects to help reduce read-write errors, are all benefits of
___________.
a. magnetic read and write mechanisms
b. platters
c. the glass substrate
d. a solid state drive
✔✔B - ✔✔Adjacent tracks are separated by _________.
a. sectors
b. gaps
c. pits
d. heads
, ✔✔C - ✔✔Data are transferred to and from the disk in __________.
a. tracks
b. gaps
c. sectors
d. pits
✔✔D - ✔✔In most contemporary systems fixed-length sectors are used, with
_________ bytes being the nearly universal sector size.
a. 64
b. 128
c. 256
d. 512
✔✔A - ✔✔Scanning information at the same rate by rotating the disk at a fixed speed is
known as the _________.
a. constant angular velocity
b. magnetoresistive
c. rotational delay
d. constant linear velocity
✔✔B - ✔✔The disadvantage of _________ is that the amount of data that can be stored
on the long outer tracks is only the same as what can be stored on the short inner
tracks.
a. SSD
b. CAV
c. ROM
d. CLV
✔✔A - ✔✔A __________ disk is permanently mounted in the disk drive, such as the
hard disk in a personal computer.
a. nonremovable
b. movable-head
c. double sided
d. removable
✔✔C - ✔✔When the magnetizable coating is applied to both sides of the platter the disk
is then referred to as _________.
a. multiple sided
b. substrate
c. double sided
d. all of the above
✔✔D - ✔✔The set of all the tracks in the same relative position on the platter is referred
to as a _________.
a. floppy disk
