Exercise: Digital Electronics

Questions for: Digital Electronics

The simplest register is
A:
buffer register
B:
shift register
C:
controlled buffer register
D:
bidirectional register
Answer: A
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In 8085, TRAP is
A:
always maskable
B:
cannot interrupt a service subroutine
C:
used for catastrophic events like temporary power failure
D:
lowest priority interrupt
Answer: C
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SSI refers to ICs with
A:
less than 12 gates on the same chip
B:
less than 8 gates on the same chip
C:
less than 6 gates on the same chip
D:
less than 3 gates on the same chip
Answer: A
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A Read/Write memory chip has a capacity of 64 k bytes. Assuming separate data and address line and availability of chip enable signal, what is the minimum number of pins required in the IC chip?
A:
28
B:
26
C:
24
D:
22
Answer: A
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In 8085 microprocessor, in order to enable INTR interrupt, which of the following instruction are needed?
A:
EI only
B:
SIM only
C:
El and SIM both
D:
None
Answer: A
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