Memory and Storage - General Questions (8)

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Memory and Storage - General Questions

57.

Typically, how often is DRAM refreshed?

A.	2 to 8 ms
B.	4 to 16 ms
C.	8 to 16
D.	1 to 2

Answer: Option B

Explanation:

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58.

ROMs retain data when the ________.

A.	power is off
B.	power is on
C.	system is down
D.	all of the above

Answer: Option D

Explanation:

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59.

Which is not part of a hard disk drive?

A.	Spindle
B.	Platter
C.	Read/write head
D.	Valve

Answer: Option D

Explanation:

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60.

Dynamic memory cells store a data bit in a ________.

A.	diode
B.	resistor
C.	capacitor
D.	flip-flop

Answer: Option C

Explanation:

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61.

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?

mcq12_1021_1

A.	The Q0, Q2, and Q3 output lines are open; the chip is defective.
B.	The Q1 line appears to be shorted to Vcc; replace the chip.
C.	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.
D.	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 B

Explanation:

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62.

What two functions does a DRAM controller perform?

A.	address multiplexing and data selection
B.	address multiplexing and the refresh operation
C.	data selection and the refresh operation
D.	data selection and CPU accessing

Answer: Option B

Explanation:

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63.

What is a major disadvantage of RAM?

A.	Its access speed is too slow.
B.	Its matrix size is too big.
C.	It is volatile.
D.	High power consumption

Answer: Option C

Explanation:

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64.

Which of the following best describes volatile memory?

A.	memory that retains stored information when electrical power is removed
B.	memory that loses stored information when electrical power is removed
C.	magnetic memory
D.	nonmagnetic

Answer: Option B

Explanation:

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Memory and Storage - General Questions (8)

Memory and Storage - General Questions

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