6-41. In a memory segment within the protected area
with all three bits of the memory protection
control register set, which of the following
operations are allowed?
1. Execute protected
2. Write protected
3. Read protected
4. All of the above
6-42. Memory lockout is used by larger computers to
prevent access to particular areas of memory by
task state instructions. Which of the following
statements describes the lockout function?
1. It is disabled when the CPU enters a particular
executive or interrupt state and enabled when
the CPU enters the task state
2. It is enabled when the CPU enters a particular
executive or interrupt state and enabled when
the CPU enters the task state
3. It is enabled when the CPU enters a particular
executive or interrupt state and disabled when
the CPU enters the task state
4. It is disabled when the CPU enters a particular
executive or interrupt state and disabled when
the CPU enters the task state
6-43. Compared with semiconductor memories,
magnetic memories have which of the following
advantages?
1. They cost less
2. They are faster in terms of storage and access
3. They require less power and they are volatile
4. They require less power and they are
nonvolatile
6-44. The state of a core or film is changed by which of
the following conditions?
1. Current flow in the opposite direction of
sufficient magnitude to overcome the
magnetic field and to magnetize in the new
direction
2. Current flow in the same direction of
sufficient magnitude to match the magnetic
field and to magnetize in the old direction
3. Voltage amplitude of a sufficient magnitude
to overcome the magnetic field and to
magnetize in the new direction
4. Current flow in the opposite direction of
sufficient magnitude to overcome the
magnetic field and to magnetize in the old
direction
6-45. Compared with core memory, film memory has
which of the following advantages?
1. Increased speed of read/write operations and
less power required
2. More compact and durable
3. Twice as many memory cells can be put in the
same space for the same amount of power
4. All of the above
6-46. Each ferrite core can store what total number of
bits?
1. One
2. Two
3. Three
4. Four
6-47. In a four-wire core winding, what is the physical
make up of the windings that are strung through
each and every core?
1. 1 drive line, 1 sense line, and 1 inhibit line
2. 2 drive lines, 1 sense line, and 2 inhibit lines
3. 2 drives lines, 1 sense line, and 1 inhibit line
4. 2 drive lines, 2 sense lines, and 1 inhibit line
IN ANSWERING QUESTIONS 6-48 THROUGH 6-51,
SELECT THE CORE LINE THAT MATCHES THE
DESCRIPTION IN EACH QUESTION.
1. Drive line
2. Sense line
3. Inhibit line
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