6-60.
In a core memory, a restore cycle is
necessary after data has been read from
memory for what reason, if any?
1. To change the state of each selected
core from zero to one
2. To change the state of all the cores
from one to zero
3. To sense the state of each core
4. None, a restore cycle is not needed
6-61.
During a restore operation of zeros in a
three-wire core, the absence of write
current on which of the following lines will
leave the cores in the zero state?
1. Digit
2. Word
3. X drive
4. Y drive
6-62.
What specific number of paired film spots
is used for each bit position?
1 . O ne
2.
Two
3. Three
4.
Four
6-63.
Current flow through which of the
following lines will magnetize a film spot?
1. Drive
2. Word only
3. Sense/digit only
4. Word or sense/digit, depending on the
function
6-64.
In the application of external fields, the
longitudinal fields are produced by passing
the current (a) in which of the following
ways and the transverse fields are produced
by passing the current (b) in which of the
following ways?
1. (a) Down the word line
(b) In the proper direction along the
sense/digit line
2. (a) In the proper direction along the
word line
(b) Down the sense/digit line
3. (a) In the proper direction along the
sense/digit line
(b) Down the word line
4. (a) In the proper direction along the
sense/digit line
(b) Down the drive line
6-65.
In a film memory, a packet stores what
specific number of bits of data?
1 . O ne
2.
Two
3. Three
4.
Four
6-66.
Which, if any, of the following devices
makes the mated film cells less susceptible
to the disturbance from other cells in close
proximity to them?
1. Ground plane
2. Insulator
3. Keeper
4. None of the above
6-67.
How is mated film memory structured?
1. Bit organized
2. Stack organized
3. Word organized
4. Array organized
49
