Question: The number of Boolean functions that can be generated by n variables is equal to_________________?

• 1. 2n
• 2. 22 n
• 3. 2n-1
• 4. — 2n

Question: Positive logic in a logic circuit is one in which______________?

• 1. logic 0 and 1 are represented by 0 and positive voltage respectively
• 2. logic 0 and, -1 are represented by negative and positive voltages respectively
• 3. logic 0 voltage level is higher than logic 1 voltage level
• 4. logic 0 voltage level is lower than logic 1 voltage level

Question: Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is__________________?

• 1. TTLAS
• 2. CMOS
• 3. ECL
• 4. TTLLS

Question: An OR gate has 6 inputs. The number of input words in its truth table are________________?

• 1. 6
• 2. 32
• 3. 64
• 4. 128

Question: NAND gates are preferred over others because these__________________?

• 1. have lower fabrication area
• 2. can be used to make any gate
• 3. consume least electronic power
• 4. provide maximum density in a chip

Question: An AND gate will function as OR if________________?

• 1. all the inputs to the gates are “1”
• 2. all the inputs are ‘0’
• 3. either of the inputs is “1”
• 4. all the inputs and outputs are complemented

Question: A debouncing circuit is________________?

• 1. an astable MV
• 2. a bistable MV
• 3. a latch
• 4. a monostable MV

Question: In case of OR gate, no matter what the number of inputs, a____________________?

• 1. 1 at any input causes the output to be at logic 1
• 2. 1 at any input causes the output to be at logic 0
• 3. 0 any input causes the output to be at logic 0
• 4. 0 at any input causes the output to be at logic 1

Question: Excess-3 code is known as_________________?

• 1. Weighted code
• 2. Cyclic redundancy code
• 3. Self-complementing code
• 4. Algebraic code

Question: Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is__________________?

• 1. 10 CPS
• 2. 120 CPS
• 3. 12CPS
• 4. None of the above