Q.1

The fan-out capability of a digital building block can be defined as

  • the number of inputs that one output can transmit to
  • the amount of cooling required for fanning the hear out
  • the number of inputs that can transmit to one input
  • the maximum power dissipation (heat generation) that the unit can stand.
  • None of the above
Q.2

A p- channel enhancement type MOSFET performs much the same function as a PNP transistor, except that

  • it operates much faster
  • it is considerably larger
  • it is controlled by voltage rather than by current, so that it requires very little current at the control terminal
  • it is controlled by current rather than by voltage like a bipolar transistor.
  • None of the above
Q.3

The hexadecimal digits are 0 to 9 and A to _____

  • E
  • F
  • G
  • D
  • None of the above
Q.4

Flip-flop outputs are always

  • complimentary
  • the same
  • independent of each other
  • same as inputs
  • None of the above
Q.5

Conversion of decimal number 1310 to it's octal number equivalent is

  • 158
  • 178
  • 138
  • 118
  • None of the above
Q.6

De Morgan's second therm says that NAND gate is equivalent to a bubbled _____ gate.

  • AND
  • XAND
  • XOR
  • OR
  • None of the above
Q.7

A bus is a group of _____ carrying digital signals.

  • wires
  • gates
  • transistors
  • registers
  • None of the above
Q.8

The inverter OR gate and AND gate are called decision-making elements because they can recognize some input _____ while disregarding others. A gate recognizes a word when its output is _____

  • words, high
  • bytes, low
  • bytes, high
  • character, low
  • None of the above
Q.9

The ALU carries out arithmetic and logic operations. It processes _____ numbers rather than decimal numbers.

  • decimal
  • hexadecimal
  • binary
  • All of the above
  • None of the above
Q.10

The Gray code for decimal 7 is

  • 0111
  • 1011
  • 0100
  • 0101
  • None of the above
Q.11

How many inputs signals can a gate have?

  • one
  • more than one
  • two only
  • both (a) and (b)
  • None of the above
Q.12

What logic function is produced by adding an inverter to the output of an AND gate?

  • NAND
  • NOR
  • XOR
  • OR
  • None of the above
Q.13

The number of binary bits required to represent a hexadecimal digit is

  • 3
  • 4
  • 6
  • 8
  • None of the above
Q.14

Resistor Ratio design is used in linear ICs because

  • Ratios increase input resistance
  • Ratios increase amplifier gain
  • Precise resistor values are not possible with IC processes
  • All of the above
  • None of the above
Q.15

The ASCII

  • is a subset of 8-bit EBCDIC
  • is used only in Western Countries
  • is version II of the ASC Standard
  • has 128 characters, including 32 control characters
  • None of the above
Q.16

The output 0 and 1 levels for TTL logic family is approximately

  • 0.1 and 5 V
  • 0.6 and 3.5 V
  • 0.9 and 1.75V
  • -1.75 and -0.9 V
  • None of the above
Q.17

The binary numberhas _____ bytes

  • 1
  • 2
  • 4
  • 8
  • None of the above
Q.18

What logic function is produced by adding an inverter to each input and the output of an AND gate?

  • NAND
  • NOR
  • OR
  • XOR
  • None of the above
Q.19

The simplified form of the Boolean expression (X + Y + XY)(X + Z) is

  • X + Y + Z
  • XY + YZ
  • X + YZ
  • XZ + Y
  • None of the above
Q.20

A positive AND gate is also a negative

  • NAND gate
  • NOR gate
  • AND gate
  • OR gate
  • None of the above
Q.21

Conversion of decimal number 7110 to it's binary number equivalent is

  • 1100112
  • 11100112
  • 01100112
  • 10001112
  • None of the above
Q.22

The time required for a pulse to decrease fromtopercent of its maximum value is known as

  • rise time
  • decay time
  • binary level transition period
  • propagation delay
  • None of the above
Q.23

A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as

  • encoder
  • decoder
  • multiplexer
  • demultiplexer
  • None of the above
Q.24

Conversion of decimal number 2810 to it's octal number equivalent is

  • 328
  • 408
  • 348
  • 368
  • None of the above
Q.25

Division of 1000112 by 1012 is

  • 1002
  • 1112
  • 1012
  • 10102
  • None of the above
Q.26

Instead of counting with binary numbers, a ring counter uses words that have a single high _____

  • bytes
  • bit
  • gate
  • chip
  • None of the above
Q.27

What advantages do ICs have over discrete-device circuits due to their greater complexity (i.e. more circuitary in less area)

  • Smaller size
  • Higher reliability
  • Lower cost
  • All of the above
  • None of the above
Q.28

An OR gate has 6 inputs. What is the only input word that produces a 0 output?

  • 000000
  • 000111
  • 111000
  • 111111
  • None of the above
Q.29

A _____ TTL device can sink up to 16mA and can source up toMA.

  • Low-power
  • high-power
  • Standard
  • Schottky
  • None of the above
Q.30

With a NAND latch a low R and a low S produce a _____ condition.

  • race
  • set
  • reset
  • no change
  • None of the above
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