Q.1

Convert the fractional binary number 0001.0010 to decimal.

  • 1.40
  • 1.125
  • 1.20
  • 1.80
Q.2

Convert the fractional binary number 10010.0100 to decimal.

  • 24.50
  • 18.25
  • 18.40
  • 16.25
Q.3

Which of the following statements does NOT describe an advantage of digital technology?

  • The values may vary over a continuous range.
  • The circuits are less affected by noise.
  • The operation can be programmed.
  • Information storage is easy.
Q.4

The generic array logic (GAL) device is ________.

  • one-time programmable
  • reprogrammable
  • a CMOS device
  • reprogrammable and a CMOS device
Q.5

A multiplexer has ________.

  • one input and several outputs
  • one input and one output
  • several inputs and several outputs
  • several inputs and one output
Q.6

What is the decimal value of 2–1 ?

  • 0.5
  • 0.25
  • 0.05
  • 0.1
Q.7

A demultiplexer has ________.

  • one data input and a number of selection inputs, and they have several outputs
  • one input and one output
  • several inputs and several outputs
  • several inputs and one output
Q.8

Give the decimal value of binary 10010.

  • 610
  • 910
  • 1810
  • 2010
Q.9

A decoder converts ________.

  • noncoded information into coded form
  • coded information into noncoded form
  • HIGHs to LOWs
  • LOWs to HIGHs
Q.10

A DAC changes ________.

  • an analog signal into digital data
  • digital data into an analog signal
  • digital data into an amplified signal
  • none of the above
Q.11

Convert the fractional binary number 0000.1010 to decimal.

  • 0.625
  • 0.50
  • 0.55
  • 0.10
Q.12

Which of the following is a semiconductor memory?

  • RAM
  • MAR
  • CD-ROM
  • CD
Q.13

The holes through a PC board are ________.

  • smaller with SMT than with through-hole mounting
  • larger with SMT than with through-hole mounting
  • the same size as with through-hole mounting
  • usually unnecessary
Q.14

What is one relative disadvantage of serial transfer?

  • It requires too many conductors.
  • Its interconnect system is complex.
  • It is slow.
  • It can only be used over very short distances.
Q.15

Which format can send several bits of information faster?

  • Parallel
  • Serial
  • Both are the same
  • Cannot tell
Q.16

The range of voltages between VL(max) and VH(min) are ________.

  • unknown
  • unnecessary
  • unacceptable
  • between 2 V and 5 V
Q.17

What is the decimal value of 23 ?

  • 2
  • 4
  • 6
  • 8
Q.18

A flip-flop has ________.

  • one stable state
  • no stable states
  • two stable states
  • none of the above
Q.19

The output of a NOT gate is HIGH when ________.

  • the input is LOW
  • the input is HIGH
  • the input changes from LOW to HIGH
  • voltage is removed from the gate
Q.20

Digital representations of numerical values of quantities may BEST be described as having characteristics:

  • that are difficult to interpret because they are continuously changing.
  • that vary constantly over a continuous range of values.
  • that vary in constant and direct proportion to the values they represent.
  • that vary in discrete steps in proportion to the values they represent.
Q.21

A classification of ICs with complexities of 100 to 10,000 equivalent gates per chip is known as ________.

  • SSI
  • MSI
  • LSI
  • VLSI
Q.22

Which format requires fewer conductors?

  • Parallel
  • Serial
  • Both are the same
  • Cannot tell
Q.23

A pulse has a period of 15 ms. Its frequency is ________.

  • 6.66 Hz
  • 66.66 Hz
  • 666.66 Hz
  • 15 Hz
Q.24

An encoder converts ________.

  • noncoded information into coded form
  • coded information into noncoded form
  • HIGHs to LOWs
  • LOWs to HIGHs
Q.25

Digital signals transmitted on a single conductor (and a ground) must be transmitted in:

  • slow speed.
  • parallel.
  • analog.
  • serial.
Q.26

The output of an OR gate is LOW when ________.

  • all inputs are LOW
  • any input is LOW
  • any input is HIGH
  • all inputs are HIGH
Q.27

A common instrument used in troubleshooting a digital circuit is a(n) ________.

  • logic probe
  • oscilloscope
  • pulser
  • all of the above
Q.28

The parallel transmission of digital data:

  • is much slower than the serial transmission of data.
  • requires only one signal line between sender and receiver.
  • requires as many signal lines between sender and receiver as there are data bits.
  • is less expensive than the serial method of data transmission.
Q.29

Give the decimal value of binary 10000110.

  • 13410
  • 14410
  • 11010
  • 12610
Q.30

What has happened to the advances in digital technologies over the past three decades?

  • Slowed down considerably
  • Continued to increase, but at a decreasing rate
  • Made excellent progress
  • Nothing short of phenomenal
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