Deck 1: Introductory Concepts

Question 1

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

A) that vary in discrete steps in proportion to the values they represent.
B) that vary in constant and direct proportion to the values they represent.
C) that vary constantly over a continuous range of values.
D) that are difficult to interpret because they are continuously changing.

Answer 1

that vary in discrete steps in proportion to the values they represent.

Question 2

Which of the following is NOT an analog device?

A) a light switch
B) an audio microphone
C) a 10- turn potentiometer
D) a thermocouple

Answer 2

a light switch

Question 3

What is the name of a two- axis graph, with a horizontal axis representing time, that displays pulse waveforms?

A) a frequency graph
B) a digital graph
C) an analog graph
D) a timing diagram

Answer 3

a timing diagram

Question 4

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

A) Information storage is easy.
B) The time it takes to process information is shorter.
C) The operation can be programmed.
D) The circuits are less affected by noise.

Question 5

What is the binary number before 1011010₂ in the counting sequence?

A) 1011001₂
B) 1011000₂
C) 1011011₂
D) 1011100₂

Question 6

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

A) 7
B) 9
C) 8
D) 10

Question 7

Which of the following represents the largest number that can be obtained in the decimal system when the MSD positional value is 10^4?

A) 99,999
B) 100,000
C) 10,000
D) 9,999

Question 8

What is the symbol for the period of a waveform?

A) P
B) T
C) X
D) Y

Question 9

The decimal number system is NOT used in digital systems because:

A) the decimal digits to the left of the decimal point are normally raised to negative exponent values.
B) it is difficult to design electronic equipment that will recognize ten different voltage levels.
C) the binary system is NOT a weighted positional value system like the decimal system.
D) it would take a greater number of decimal digits than binary digits to express a given quantity.

Question 10

Which of these is an example of analog device?

A) speedometer
B) electric tachometer
C) on- board navigational system
D) Both A and B

Question 11

Which of the following involve digital quantities?

A) The speedometer in a mint '67 Camaro
B) Lightning
C) A ten- position switch
D) A linear thermostat

Question 12

Which is an advantage of a digital system?

A) Operation can't be programmed.
B) The ability to store information.
C) It's used in the real world.
D) Digital circuits are more affected by noise.

Question 13

Which of the following describes digital memory?

A) Outputs remain in their new state after inputs are removed.
B) Inputs remain in their new state after outputs are removed.
C) Outputs return to their original state after inputs are removed.
D) Inputs return to their original state after outputs are changed.

Question 14

Which of the following voltage ranges would most likely be used to represent a binary zero in a typical digital circuit?

A) 0.8 V - 4 V
B) 0 V - 2 V
C) 2 V - 5 V
D) 0 V - 0.8 V

Question 15

Which of the following voltage ranges would most likely be used to represent a binary one?

A) 2 V - 5 V
B) 0 V - 0.8 V
C) 0.8 V - 2 V
D) 0 V - 4 V

Question 16

A given digital circuit is referred to as a logic circuit. This label means that the circuit operates:

A) as an analog representation of a given quantity.
B) by an unknown characteristic of a specific set of rules.
C) by a certain set of logic rules.
D) as a fully hybrid circuit.

Question 17

The parallel transmission of digital data:

A) is much slower than the serial transmission of data.
B) requires only one signal line between sender and receiver.
C) requires as many signal lines between sender and receiver as there are data bits.
D) is less expensive than the serial method of data transmission.

Question 18

A set of instructions that tell a computer exactly what to do is called a(n):

A) memory unit.
B) program.
C) control unit.
D) arithmetic/logic unit.

Question 19

Which of the following is NOT used to enter data into a computer through its input unit?

A) printer/plotter
B) magnetic disk
C) punched cards
D) keyboard

Question 20

The name of the computer unit that sends appropriate signals to all the other units to cause a specific instruction to be executed is the:

A) arithmetic/logic unit.
B) output unit.
C) memory unit.
D) control unit.

Question 21

The microprocessor's logic, memory, and input/output circuits are collectively referred to as:

A) microprocessor packaging.
B) semiconductor modules.
C) microcomputers.
D) microprocessor power supply.

Question 22

In addition to its microprocessor, a microcontroller must also have_____________circuits.

A) output ports
B) input ports
C) internal memory
D) all of the above

Question 23

The electronic device that converts digital data to an analog quantity is the:

A) ADC.
B) TTL.
C) DAC.
D) CMOS.

Question 24

What is the primary numbering system in digital applications?

A) octal
B) binary
C) decimal
D) hexadecimal

Question 25

You can compare timing diagrams with an oscilloscope.

Question 26

Parallel data transmission requires one transmission line per bit.

Question 27

Serial data transmission requires only two transmission lines.

Question 28

Memory plays an important role in digital systems.

Question 29

TTL stands for Total Timing Logistics.

Question 30

The two types of data transmission are parallel and serial.

Question 31

The primary disadvantage to digital techniques is that the "real world" is primarily analog.

Question 32

Each digit in the binary number system has three possible values.

Question 33

A graph representing voltage as a function of time is called a timing diagram.

Question 34

Digital systems process only two numbering systems.

Question 35

Transitions on a timing diagram appear as vertical lines.

Question 36

It is common to see both analog and digital circuits within the same system.

Question 37

Analog circuits are also called logic circuits.

Question 38

DAC stand for digital- to- analog converter.

Question 39

Hybrid systems contain both digital and analog circuits.

Question 40

Two signal voltages having slightly different voltage levels cannot be at the same binary levels.

Question 41

The logic analysis of a digital circuit is used to determine how the circuit responds to a binary (0 or1) input rather than an actual input voltage.

Question 42

A computer is a system of hardware that performs arithmetic operations, manipulates data, and makes decisions.

Question 43

Circuits that exhibit the property of memory normally revert to their original state when the input is removed.

Question 44

If the LSB of a binary number is a one (1), it is an even number.

Question 45

It is difficult to store digital data.

Question 46

Greater accuracy and precision are possible with digital techniques.

Question 47

Digital circuits are more affected by noise than analog circuits.

Question 48

In a typical digital system, 4.5 V and 3.1 V represent different binary levels.

Question 49

Serial data transmission costs more to implement than parallel data transmission.

Question 50

Parallel data transmission is faster than serial data transmission.

Question 51

Minicomputers can handle more data than mainframes.

Question 52

Circuits that do not exhibit the property of ___________have outputs that revert back to a previous state when an input signal is removed.

Question 53

The decimal system is a___________in which the value of a digit depends on its position.

Question 54

Digital circuits are also called___________circuits.

Question 55

The circuit property of retaining its response to a momentary input is called___________.

Question 56

A(n) ___________ is the smallest type of computer.

Question 57

A(n) ___________ quantity varies in proportion to a voltage or current.

Question 58

When digital and analog systems are combined the result is called a ___________system.

Question 59

A "CPU on a chip" is called a(n)___________

Question 60

In___________data transmission, a single conductor is used.

Question 61

In___________data transmission, multiple conductors are used.

Question 62

A___________diagram shows how logic signal level varies with respect to time.

Question 63

A computer's___________unit takes instructions from the memory unit and interprets them.

Question 64

A more specialized type of microcomputer is a(n)___________ .

Question 65

The three most commonly- used numbering systems in the digital system are___________ ,___________ , and___________ .

Question 66

The___________system is also called the base- 10 system.

Question 67

___________circuits are less susceptible to noise than ___________circuit.

Question 68

The___________number system is composed of 10 numerals or symbols.

Question 69

___________circuits are designed to produce output voltages that are within the prescribed 0 and 1 voltage ranges.