With four Boolean variables, how many Boolean expressions can be performed?
Answer: D
No Explanation.
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Assertion (A): Even if TTL gates and CMOS gates used in a realization have the same power supply of + 5 V, suitable circuit is needed to interconnect them
Reason (R): VOH, VOL, VIH and VIL of a TTL gave are respectively 2.4, 0.4, 2 and 0.8 V respectively. If supply voltage is + 5 V. VIL and VIH for CMOS gate for the supply voltage of + 5 V are 1.5 V and 3.5 V respectively.
Answer: A
Interfacing is necessary and interfacing depends on gate parameters like VOH, VOL, IIH, IIL.
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Which one of the following can be used as parallel to series converter?
Answer: C
It converts parallel data into serial data.
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It is desired to display the digit 7 using a seven segment display. The LEDs to be turned on are
Answer: A
No Explanation.
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Octal number 12 is equal to decimal number
Answer: C
12 in octal = 8 + 2, i.e., 10 in decimal.
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In 2's complement representation the number 11100101 represents the decimal number
Answer: D
A = 11100101. Therefore A = 00011010 and A' = A + 1 = 00011011 = 16 + 8 + 2 + 1 = 27. Therefore A = -27.
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Which of these are two state devices?
Answer: D
Each has 2 states.
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A 4 : 1 multiplexer requires __________ data select line.
Answer: B
22 = 4. Hence 2 select lines.
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If the ladder reference voltage is 2 V, then minimum comparator resolution required is
Answer: A
No Explanation
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Assertion (A): ECL is fast as compared to TTL.
Reason (R): ECL dissipates less power than TTL.
Answer: C
ECL dissipates more power than TTL.
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