Question: Digital computers are more widely used as compared to analog computers, because they are______________?

• 1. less expensive
• 2. always more accurate and faster
• 3. useful over wider ranges of problem types
• 4. easier to maintain

Question: Consider the representation of six-bit numbers by two’s complement, one’s complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000 ?

• 1. Two’s complement only
• 2. Sign and magnitude and one’s complement only
• 3. Two’s complement and one’s complement only
• 4. All three representations

Question: (1(10101)2 is_______________?

• 1. (37)10
• 2. ( 69)10
• 3. (41 )10
• 4. — (5)10

Question: What is the octal equivalent of the binary number : 10111101 ?

• 1. 675
• 2. 275
• 3. 572
• 4. 573

Question: The number 1000 would appear just immediately after__________________?

• 1. FFFF (hex)
• 2. 1111 (binary)
• 3. 7777 (octal)
• 4. All of the above

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