ATO2 NAVY ADVANCEMENT UPDATED EXAMS
UPDATED QUESTIONS AND ANSWERS SURE A+
✔✔What type of storage can retain its data even if there is a power failure or
breakdown? - ✔✔Nonvolatile (magnetic core storage and bubble memory are
examples)
✔✔Bubble memory consists of what? - ✔✔A very thin crystal made of semiconductor
material
✔✔How are the magnetic domains of a bubble memory switched? - ✔✔By passing a
current through a control circuit imprinted on top of the crystal
✔✔What do we mean when we say that reading from bubble memory is
nondestructive? - ✔✔The data is still present after being read
✔✔In what type of memory are often used instructions and programs permanently
stored inside the computer? - ✔✔Read-only memory (ROM)
✔✔Who provides the programs stored in ROM? - ✔✔Only the manufacturer.
✔✔Can programs in ROM be changed? - ✔✔No.
, ✔✔What is another name for random-access memory (RAM)? - ✔✔Read/write memory
✔✔How is data read from or written into RAM? - ✔✔By giving the computer the address
of the location where the data is stored or is to be stored.
✔✔In what two states can programmable read-only memory (PROM) be purchased? -
✔✔Already programmed by the manufacturer or in a blank state.
✔✔What is the main disadvantage of PROM? - ✔✔If a mistake is made and entered, it
cannot be corrected or erased.
✔✔What does EPROM stand for? - ✔✔Erasable programmable read-only memory.
✔✔How is EPROM erased? - ✔✔With a burst of ultra-violet light
✔✔Why are disk storage devices popular? - ✔✔Largely because of their direct access
capabilities
✔✔How is data stored on all disks? - ✔✔In a number of invisible concentric circles
called tracks.
✔✔What precedes each record on a disk? - ✔✔A disk address
✔✔How is the storage capacity of a disk determined? - ✔✔By the bits per inch of track
and the tracks per inch of surface.
✔✔What two ways can data be physically organized on a disk pack? - ✔✔By cylinder or
sector
✔✔The amount of data that can be stored on a linear inch of tape is known by what
term? - ✔✔Recording density
✔✔The length of tape between BOT and EOT is referred to by what term? - ✔✔The
usable recording (reading/writing) surface or usable storage area
✔✔How does a magnetic drum differ from a magnetic disk? - ✔✔The tracks in which
the data is stored are assigned to channels that form circular bands around the drum
✔✔Tracks on each channel of a magnetic drum are grouped into what? - ✔✔Sectors
✔✔What is the purpose of any magnetic tape unit? - ✔✔To write data on or read data
from a magnetic tape
UPDATED QUESTIONS AND ANSWERS SURE A+
✔✔What type of storage can retain its data even if there is a power failure or
breakdown? - ✔✔Nonvolatile (magnetic core storage and bubble memory are
examples)
✔✔Bubble memory consists of what? - ✔✔A very thin crystal made of semiconductor
material
✔✔How are the magnetic domains of a bubble memory switched? - ✔✔By passing a
current through a control circuit imprinted on top of the crystal
✔✔What do we mean when we say that reading from bubble memory is
nondestructive? - ✔✔The data is still present after being read
✔✔In what type of memory are often used instructions and programs permanently
stored inside the computer? - ✔✔Read-only memory (ROM)
✔✔Who provides the programs stored in ROM? - ✔✔Only the manufacturer.
✔✔Can programs in ROM be changed? - ✔✔No.
, ✔✔What is another name for random-access memory (RAM)? - ✔✔Read/write memory
✔✔How is data read from or written into RAM? - ✔✔By giving the computer the address
of the location where the data is stored or is to be stored.
✔✔In what two states can programmable read-only memory (PROM) be purchased? -
✔✔Already programmed by the manufacturer or in a blank state.
✔✔What is the main disadvantage of PROM? - ✔✔If a mistake is made and entered, it
cannot be corrected or erased.
✔✔What does EPROM stand for? - ✔✔Erasable programmable read-only memory.
✔✔How is EPROM erased? - ✔✔With a burst of ultra-violet light
✔✔Why are disk storage devices popular? - ✔✔Largely because of their direct access
capabilities
✔✔How is data stored on all disks? - ✔✔In a number of invisible concentric circles
called tracks.
✔✔What precedes each record on a disk? - ✔✔A disk address
✔✔How is the storage capacity of a disk determined? - ✔✔By the bits per inch of track
and the tracks per inch of surface.
✔✔What two ways can data be physically organized on a disk pack? - ✔✔By cylinder or
sector
✔✔The amount of data that can be stored on a linear inch of tape is known by what
term? - ✔✔Recording density
✔✔The length of tape between BOT and EOT is referred to by what term? - ✔✔The
usable recording (reading/writing) surface or usable storage area
✔✔How does a magnetic drum differ from a magnetic disk? - ✔✔The tracks in which
the data is stored are assigned to channels that form circular bands around the drum
✔✔Tracks on each channel of a magnetic drum are grouped into what? - ✔✔Sectors
✔✔What is the purpose of any magnetic tape unit? - ✔✔To write data on or read data
from a magnetic tape
