Q.1

Temperature variation is normally an analog quantity.

  • True
  • False
Q.2

Transistor-transistor logic (TTL) uses the bipolar transistor as its main circuit element.

  • True
  • False
Q.3

A microcomputer is not a general-purpose computer.

  • True
  • False
Q.4

An invalid digital signal is used as a zero.

  • True
  • False
Q.5

With an AND gate, if one input is HIGH, the output reflects the other input.

  • True
  • False
Q.6

Digital circuits cannot perform logic comparisons since the circuit can have only one of two values at any instant.

  • True
  • False
Q.7

With an OR gate, the output is HIGH only when both inputs are HIGH.

  • True
  • False
Q.8

PALs are relatively simple integrated circuit devices.

  • True
  • False
Q.9

A digital quantity has a discrete set of values.

  • True
  • False
Q.10

The time interval on the leading edge of a pulse between 10% and 90% of the amplitude is the rise time.

  • True
  • False
Q.11

How many binary bits are necessary to represent 748 different numbers?

  • 9
  • 7
  • 10
  • 8
Q.12

What is a digital-to-analog converter?

  • It takes the digital information from an audio CD and converts it to a usable form.
  • It allows the use of cheaper analog techniques, which are always simpler.
  • It stores digital data on a hard drive.
  • It converts direct current to alternating current.
Q.13

What kind of logic device or circuit is used to store information?

  • Counter
  • Register
  • Inverter
  • Buffer
Q.14

Any number with an exponent of zero is equal to:

  • zero
  • one
  • that number
  • ten
Q.15

The rise time is the time it takes a pulse to go from ________.

  • the base line to the maximum HIGH voltage
  • 10% of the pulse amplitude to the maximum HIGH voltage
  • the base line to 90% of the pulse amplitude
  • 10% of the pulse amplitude to 90% of the pulse amplitude
Q.16

A periodic digital waveform has a pulse width (tw) of 6 ms and a period (T) of 18 ms. The duty cycle is ________.

  • 3.3%
  • 33.3%
  • 6%
  • 18%
Q.17

What are the symbols used to represent digits in the binary number system?

  • 0,1
  • 0,1,2
  • 0 through 8
  • 1,2
Q.18

PLCC packages have leads on ________.

  • one side
  • two sides
  • three sides
  • four sides
Q.19

What is the typical invalid voltage for a binary signal?

  • 0.7–2.8 volts
  • 0.8–3 volts
  • 0.8–2 volts
  • 0.7–2.5 volts
Q.20

In the decimal numbering system, what is the MSD?

  • The middle digit of a stream of numbers
  • The digit to the right of the decimal point
  • The last digit on the right
  • The digit with the most weight
Q.21

What is an analog-to-digital converter?

  • It makes digital signals.
  • It takes analog signals and puts them in digital format.
  • It allows the use of digital signals in everyday life.
  • It stores information on a CD.
Q.22

Any number with an exponent of one is equal to:

  • zero.
  • one.
  • two.
  • that number.
Q.23

Serial format means digital signals are:

  • sent over many conductors simultaneously.
  • sent over one conductor sequentially.
  • sent in groups of eight signals.
  • sent in binary coded decimal.
Q.24

Which of the following is not an analog device?

  • Thermocouple
  • Current flow in a circuit
  • Light switch
  • Audio microphone
Q.25

A full subtracter circuit requires ________.

  • two inputs and two outputs
  • two inputs and three outputs
  • three inputs and one output
  • three inputs and two outputs
Q.26

The output of an AND gate is LOW ________.

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

Parallel format means that:

  • each digital signal has its own conductor.
  • several digital signals are sent on each conductor.
  • both binary and hexadecimal can be used.
  • no clock is needed.
Q.28

In positive logic, ________.

  • a HIGH = 1, a LOW = 0
  • a LOW = 1, a HIGH = 0
  • only HIGHs are present
  • only LOWs are present
Q.29

A classification of ICs with complexities of 12 to 100 equivalent gates on a chip is known as ________.

  • SSI
  • MSI
  • LSI
  • VLSI
Q.30

Convert the fractional decimal number 6.75 to binary.

  • 0111.1100
  • 0110.1010
  • 0110.1100
  • 0110.0110
0 h : 0 m : 1 s