Exercise: Digital Electronics

Questions for: Digital Electronics

In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than that of register B, As a result.
A:
carry flag will be set but zero flag will be reset
B:
carry flag will be reset but zero flag will be set
C:
both carry flag and zero flag will be reset
D:
both carry flag and zero flag will be set
Answer: A
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Assertion (A): In a parallel in-serial out shift register data is loaded one bit-at a time

Reason (R): A serial in-serial out shift register can be used to introduce a time delay.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is true, R is false
D:
A is false, R is true
Answer: D
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Programmable logic array uses
A:
RAM matrices
B:
ROMs matrices
C:
PROM matrices
D:
Silo memory
Answer: B
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Which has the lowest propagation delay time?
A:
ECL
B:
TTL
C:
CMOS
D:
PMOS
Answer: A
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A transistor is operated as non-saturated switch to eliminate
A:
turn on time
B:
turn off time
C:
storage time
D:
delay time
Answer: B
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