Exercise: Digital Electronics

Questions for: Digital Electronics

In a digital system there are three inputs ABC. Output should be high when atleast two inputs are high. Then output =
A:
AB + BC + AC
B:
ABC + ABC + A BC + ABC
C:
AB + BC + AC
D:
AB + BC + AC
Answer: B
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In Von-Neumann-or Princeton-type computers, the program
A:
can appear any where within the memory
B:
memory and data memory are clearly distinguished
C:
data and instructions are distinguished at the first stage
D:
none of the above
Answer: A
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In a clocked NAND latch, race condition occur when
A:
R and S are high CLK is low
B:
R and CLK are high and S is low
C:
R, S, CLK are high
D:
R, S, CLK are low
Answer: C
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Assertion (A): An SR latch has the problem of RAC condition

Reason (R): While designing a digital circuit RAC condition should be avoided.

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: B
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The circuit shown in the figure is a
A:
positive logic OR circuit
B:
negative logic OR circuit
C:
positive logic AND circuit
D:
negative logic AND circuit
Answer: A
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