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Digital Electronics - Memory and Storage

Exercise : Memory and Storage - General Questions
31.
Which of the following best describes volatile memory?
memory that retains stored information when electrical power is removed
memory that loses stored information when electrical power is removed
magnetic memory
nonmagnetic
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
What is a major disadvantage of RAM?
Its access speed is too slow.
Its matrix size is too big.
It is volatile.
High power consumption
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
What two functions does a DRAM controller perform?
address multiplexing and data selection
address multiplexing and the refresh operation
data selection and the refresh operation
data selection and CPU accessing
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.

The RAM circuit given below is suspected of being bad. A check with a logic probe shows pulse activity on all of the address lines and data inputs. The / line and inputs are forced HIGH and the data output lines are checked with the logic probe. Q0, Q2, and Q3 show a dim indication on the logic probe; Q1 indicates a HIGH level on the logic probe. What, if anything, is wrong with the circuit?

The Q0, Q2, and Q3 output lines are open; the chip is defective.
The Q1 line appears to be shorted to Vcc; replace the chip.
The outputs should be active only when the / line is held LOW, so the circuit is behaving normally considering the fact that the line is HIGH.
The EN input should be forced HIGH and the outputs rechecked; if they are still giving the same indications as before, then the three outputs are definitely open and the IC will have to be replaced.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Dynamic memory cells store a data bit in a ________.
diode
resistor
capacitor
flip-flop
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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