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WorksheetsIOT102_PART3
Total questions: 157
Worksheet time: 1hrs 21mins
How many digital pins are there in the UNO board?
A.14
B.12
C.16
d.20
_________ board allows sewn into clothing.
There is efficiency gains from ________ all sorts of equipment.
A.Implementation
B.Analogous
C.Evolution
D.Digitization
A provider which produces 99 percent uptime ________
With physical security, the stakes are incredibly ________
A.Very high
B.Low
C.Very low
D.High
Which digit does the colour yellow denote on a resistor colour band?
A.2
B.4
C.7
D.3
Which digit does the colour orange denote on a resistor colour band?
A.9
B.1
C.6
D.3
A resistor's first three colour bands are red, yellow and black. What is its value?
A.240 ohms
B.24 ohms
C.32 ohms
D.420000 ohms
Which digit is represented by a blue band on a resistor?
A.4
B.8
C.6
D.9
Which digit is represented by a black band on a resistor?
A.100
B.1
C.1000
D.0
A resistor's first three colour bands are brown, green and red. What is its value?
A.1500 ohms
B.250 ohms
C.2000 ohms
D.510 ohms
Which of these colours is NOT used in the resistor value colour code?
A micro-controller is...
A.small CPU made of transistors and conductors of heat and sound sensor
B.portable circuits capable of making other circuits
C.small computer on a single integrated circuit containing a processor core, memory, and programmable input/output peripherals
D.small chip made of silver
What does GPIO stand for?
A.General Purpose Inner Outer Propeller
B.General Purpose Interested Old People
C.General Purpose Input Output Pins
D.General Purpose Input Output Processor
Before your program "code" can be sent to the board, it needs to be converted into instructions that the board understands. This process is called...
A.Stop
B.Create Sketch
C.Compile
D.Serial Monitor
This shows you what the IDE is currently doing and is also where error messages display if you make a mistake in typing your program. (often called a syntax error)
A.Sketch Editor
B.Text Console
C.Line Number
D.Serial Monitor
This shows you what line number your cursor is on. It is useful since the compiler gives error messages with a line number.
A.Sketch Editor
B.Text Console
C.Line Number
D.Serial Monitor
A function is a series of programming statements that can be called by name. Which command is called once when the program starts:
A.loop()
B.(output)
C.setup()
D.(input)
A function is a series of programming statements that can be called by name. Which command is called repetitively over and over again as long as the Arduino has power.
A.loop()
B.(output)
C.setup()
D.(input)
A function is a series of programming statements that can be called by name. Which command delays the LED by a number of milliseconds is.
A.loop()
B.delay()
C.setup()
D.stop()
What is this line of code: // the loop function runs over and over again forever
A.A statement
B.A single line comment
C.A function definition
D.A bowl of cereal
What is this line of code: void loop() {
A.A statement
B.A single line comment
C.Part of a function definition
D.A banana
If you make a voltage divider circuit with R1 = 10K and R2 = 10K, and your Vin is 12V, what will be your Vout?
A.12V
B.10V
C.6V
D.5V
How many bits are there in a byte?
A.256
B.8
C.16
D.10
What is the nominal voltage of 6 AAA batteries connected in parallel?
A.6V
B.9V
C.12V
D.1.5V
This is an unsigned data type that occupies 1 byte of memory. Same as the byte datatype. It encodes numbers from 0 to 255.
A.highByte()
B.unsigned char
C.unsigned long
D.volatile
This is used to include outside libraries in your sketch. This gives the programmer access to a large group of standard C libraries (groups of pre-made functions), and also libraries written especially for Arduino.
A.#include
B.break
C.void
D.#define
This clears (writes a 0 to) a bit of a numeric variable.
A.bitClear
B.sizeof()
C.pinMode
D.#include
The void keyword is used only in function declarations. It indicates that the function is expected to return no information to the function from which it was called.
Sensors play a big part in the Internet of Things, collecting data from the physical world. There is a long and growing list of sensor types, but some of the more common ones are found in smart phones. Which sensor in your phone collects information on your physical activity for health apps?
A.Gyroscope
B.Magnetometer
C.Proximity sensor
D.Accelerometer
In an industrial fan maintenance system, what physical change does Ian Howard say a sensor might detect, measure and transmit data on?
A.Vibration
B.Blade speed
C.Power
D.Wind direction
When the gate system at the dairy closes one gate and opens another to direct a cow into a particular area, what is (or what are) the actuators in play?
A.RF antennae detecting ID of cow
B.Light sensors detecting cow in gate
C.Pneumatic arms on gate mechanism
D.Movement sensor in cow's pendant
All of the parts of a complete IoT process need programming. But where in the following IoT process is programming needed for the system to be Internet of Things?
A.Soil sensor to microcontroller to the Cloud to microcontroller to fertilising mechanism
B.Soil sensor and Cloud and fertilising mechanism
C.Microcontroller and Cloud
D.Soil sensor and Microcontroller
E.Soil sensor and fertilising mechanism
Which of these sentences could be a line of programming code?
A.If temperature is more than 30 degrees C, run fan, else, run heater
B.When it gets too hot, turn the fan on otherwise keep heating the room
C.Run heater until temperature reaches 30 degrees C then cool it down
In the reticulation (water irrigation) system, what type of device is the outdoor camera?
A.Sensor
B.Actuator
C.Control
D.none of the above
What sort of actuator would you use to control the movement of a conveyor belt?
A.A linear actuator
B.An AC motor
C.A thermocouple
D.A water pump
E.A rubber belt
Which of the following IS NOT criteria to help select a wired communication protocol?
A.Speed
B.Number of wires per connection
C.Ability to transmit and receive information at the same time
D.Number of devices that need connecting
E.Distance to the nearest power point
F.Maximum distance between master and slaves
If we intend to include a servo motor as an actuator, what feature should we include when selecting a microcontroller?
A.Analogue to Digital converter
B.Digital to Analogue converter
C.GPIO pins
D.Pulse Width Modulation pin
E.I2C pins
In an IoT smart home system, sensors are connected to the home power outlet and are required to process some part of the collected data. What would be the best option to connect sensors to each other, as well as a central location for Internet connection, where high data rate is required?
A.Bluetooth
B.6LowPAN
C.WiFi
D.LoRa
From the list below, which is the LPWAN technology?
A.LoRa
B.WiFi
C.LTE
D.6LowPAN
Fill in the blank: System _________________ can be a major problem, especially in badly designed closed-loop systems, as they may try to over-correct any errors which could cause the system to lose control and oscillate.
One advantage of a closed loop feedback system is:
A.Simplicity of design
B.Ability to react to disturbances in the system
C.It is less stable than an open loop system
D.Depends on calibration for accuracy
E.All of the above
Fill in the blank. If we want to measure the temperature of a solution in a chemical process to within 0.1 degree Celsius, over a range of 100 degrees, our development board would need a ____________ converter to meet that requirement for accuracy.
A.8 bit
B.10 bit
C.16 bit
D.32 bit
________ provide the means to create capability that reflects true awareness of the physical world and people.
________ in IoT as one of the key characteristics, devices have different hardware platforms and networks.
IoT devices are naturally vulnerable to ________ threats.
What is the role of communication protocol in IoT?
Which of the following is the future application of IoT?
A.Role of green IoT system
B.QoS in communication
C.Secure communication
D.Multimedia communication
__________ layer is the communication layer that connects the IoT devices with WAN.
A.Internet layer
B.Application layer
C.Sensor layer
D.Network layer
________ either built into smoke alarm and thermostat or in the form of small plug - in.
A.Microphones
B.Loudspeaker
C.Microphone and loudspeaker
D.Mic
________ Will reduces the cost of the devices.
A.Intuitive
B.Voice telephony
C.Voice recognition
D.Voice Integration
How many analog pins on an Arduino Uno board?
A.5
B.6
C.7
D.8
Which of the following function is used to set any pin in the state of HIGH/LOW ?
A.digitalRead
B.digitalWrite
C.analogWrite
D.pinMode
What does PWM stand for?
A.Pulse Width Modulation
B.Pulse Wide Module
C.Preventive Width Modulation
D.None of the other
Which function in the Arduino IDE is used to set any pin in output or input state?
A.digitalWrite
B.delay
C.pinMode
D.analogRead
How many PWM pins are present in the Arduino UNO?
A.1
B.3
C.6
D.9
What among the following is an example of external interrupt for the Arduino?
A.Button
B.Resistor
C.LED
D.Capacitor
What will be the correct syntax to make a digital pin (say D2) as an output pin?
A.pinMode(2,output)
B.pinMode(2,Output)
C.pinMode(2,OUTPUT)
D.pinmode(2,OUTPUT)
Which of the following digital pins can be used in Arduino Nano/Uno to give interrupt?
A.D2
B.D6
C.D4,D5
D.D2,D3
What is the size of EEPROM of the Arduino UNO?
A.1 KB
B.2 KB
C.4 KB
D.8 KB
Which function in the Arduino is used to start the serial communication using the COM port?
A.Serial.available()
B.Serial.begin()
C.serial.begin()
D.setup()
The action that will be performed using this switch case will be:switch (2): {case 1: digitalWrite(11,HIGH); case 2: analogRead(A3)}
A.D11 will become HIGH
B.Analog value of A3 will be read
C.D11 will become LOW
D.None of the other
While taking the input from the user in Arduino, which of these function is used in Sketch?
A.Serial.print
B.Serial.println
C.Serial.available
D.None of the other
What is the Tinkercad Circuits?
A.Its a just s software to create games
B.Tinkercad is a free online collection of software tools that help people create and simulation circuits.
C.Its a software for playing and create games.
D.None of the other
How do you zoom in on Tinkercad?
A.Spacebar
B.Use the arrows on the keyboard
C.Use the scroll wheel
D.Right Click
A photoresistor is an electronic component whose electrical resistance _______ when it is exposed to light.
A.changes
B.increases
C.doesn't change
What does this syntax mean? myservo.attach(9)
A.Connect the control wire 9 to GND pin
B.Connect the control wire for 9 seconds
C.Connect the control wire to 9 volts
D.Connect the control wire to digital pin 9
In remote control terms, IR stands for what?
A.indirect radio
B.infrared
C.inside remote
D.instant reception
Infrared remote controls use what to carry signals between the remote control and the device it controls?
Infrared signals can be used for ______.
A.(a) long-range communication
B.(b) short-range communication
C.Both (a) and (b)
D.None of the other
Which sensor is LM35?
A.Pressure sensor
B.Humidity sensor
C.Temperature sensor
D.Touch sensor
LM35 provides _______ Volt for each degree count?
A.1
B.0.01
C.0.001
D.10
What is the main purpose of the SRF05 sensor?
A.Water level sensor
B.Sound intensity sensor
C.Ranging sensor
D.Temperature sensor
What is the purpose of the pin named ECHO of HC-SR04 sensor?
A.Allows the ultrasonic sound wave to be sent from the sensor.
B.Provides the information that the ultrasonic sound wave is returned.
C.Allows the sensor to be fed with energy.
D.Provides the chassis connection of the sensor.
What does the AREF pin on the Arduino UNO?
A.Used to trigger a interrupt.
B.Reference voltage for analog inputs.
C.To reset the microcontroller.
D.Provides 8-bit PWM signal.
What pins can the Arduino UNO board communicate with the computer?
A.PWM pins
B.ADC pins
C.I2C pins
D.UART pins
What case is called serialEvent() interrupt?
A.Serial port shuts down.
B.When data is sent from the serial port.
C.When data comes from the serial port.
D.When the voltage is applied to the Arduino.
Each computer has its own Internet search engine.
A.True
B.False
What does CRM stand for?
A.Customer Research Management
B.Customer Relationship Management
C.Customized Research Management
D.Customer Research Metrics
A _____ allows customers to continue browsing after selecting each item they wish to purchase
Which of the following is NOT a standard used in E-Commerce?
A.EDI
B.XML
C.SETI
D.X12
Which of the following is NOT the characteristics of consumer when studying about EC Consumer Behavior Model?
Mechanism to protect private networks from outside attack is
While making payment using electronic check, credit and debit cards, the server authenticates the customers and verifies with the bank that funds are adequate before purchase
A.True
B.False
A computer communication technology that provides a way to interconnect multiple computer across short distance is
DNS is
A.The distributed hierarchical naming system
B.The vertical naming system
C.The horizontal naming system
D.The client server system
Which of the following is a technology constraint from the e-commerce macro-environment?
A.Propensity for consumers to purchase online.
B.Opt-in to e-mail required to avoid SPAM
C.Likelihood of fraudulent transactions
D.Taxation at source of purchase
In E-Commerce, HTTPS is a communication protocol that uses
The concept of electronic cash is to execute payment by
A chemical manufacturer has transactions that are predominantly:
A B2B reverse auction is:
A.the same as a seller auction.
B.intended to reduce the price by increasing competition from suppliers.
C.always run through a B2B marketplace.
D.both the second and third answers above.
A computer system that permits multiple users to run programs at same time
A.Real time system
B.Multi programming system
C.Time sharing system
D.Multi tasking system
The mercantile process model consists of the following phase(s):
A.The pre-purchase phase
B.Purchase consummation phase
C.Post-purchase Interaction phase
D.All of the above
The most serious disadvantage of e-auctions is:
A.the risk of fraud.
B.Logistics.
C.unreliable auction software.
D.payment delays.
Many companies use intermediaries or trading assistants instead of implementing e-auctions themselves for each of the following reasons EXCEPT:
All of the following are potential benefits from auctions to sellers EXCEPT:
A.auctions can broaden the customer base and reduce cycle time.
B.sellers receive valuable price sensitivity information
C.sellers are always anonymous.
D.sellers can liquidate large quantities of obsolete items very quickly.
Select the correct answer from the choices below which is corresponding with the following statement in STRATEGIC PLANNING TOOLS" : It is a methodology that surveys external opportunities and threats and relates them to internal strengths and weaknesses.
A major shortcoming with authentication services is:
A.two different authenticators may come up with different opinions regarding the authenticity and description of a given item.
B.it is impossible to tell whether many items are reproductions or genuine.
C.dishonest authenticators are the primary sources of fraud on the Internet.
D.most auction sites forbid the use of authentication services.
_____ work best with many buyers and many sellers.
A.Bartering
B.Dynamic exchanges
C.Forward auctions
D.Reverse auctions
The services provided through location-based m-commerce focus on key factors which include all of the following EXCEPT:
A.Geocaching, or determining the topography of an area.
B.Navigation, or plotting a route from one location to another.
C.Tracking, or monitoring the movement of a person or thing.
D.Timing, or determining the precise time at a specific location
Infrastructures that "support" the wireless connection are:
A.network access points, mobile communications server switches, and cellular transmitters and receivers.
B.WAP gateways, GPS locators, and GPS satellites.
C.PDAs, smartphones, and portable computers
D.web servers, mobile devices, and microbrowsers.
A ______ is suitable for mobile users who need to make very short-range device-to-device wireless connections within a small space, such as a single room, and most commonly with Bluetooth.
A.personal area network
B.local area network
C.wireless area network
D.metropilitan area network
You are walking near a coffee shop and suddenly your cell phone beeps with a message: "Come inside and get a free biscotti with any purchase." This is an example of:
A.permission marketing
B.location-based advertising
C.customer relationship management
D.m-commerce
One way to share information with supply chain partners is wireless _________, which is the science of measuring physical phenomena such as temperature, volume, or an on/off condition at a remote point and transmitting the value to a distant recorder or observer
A.RFID
B.mobilization
C.osmosis
D.telemetry
WiMax and 3G wireless mobile technologies offer telemedicine application opportunities that include all of the following EXCEPT:
A.Reduced threat of malpractice suits because there is no hands-on interaction between the remote physician and the patient.
B.Prescriptions can be transferred electronically to the appropriate pharmacy for a no-wait pick-up by the patient.
C.Real-time consultation between a patient in one location and a medical specialist in another.
D.Wearable heart monitors linked to a cell phone can automatically contact doctors or family members at the first sign of health problems.
All of the following about RFID are true EXCEPT:
A.An RFID tag can hold 20 times the amount of information a bar code can hold, and the tag can be read through cardboard, wood, and plastic at a range of up to 100 feet
B.An RFID tag includes an antenna and a chip with information about the item
C.An RFID reader contains a radio transmitter and receiver
D.An RFID tag remains inactive until radio frequency energy from the tag's radio transmitter hits its antenna, giving the chip enough power to emit a 96-bit string of information
Digital Signature is
A.Scanned Signature on Computer
B.Code number of the sender
C.Public Key Encryption
D.Software to recognize signature
The method(s) of payment for online consumers are
Which of the following statements are INCORRECT about company-centric marketplaces?
A.They are marketplaces which focus on a single company's purchasing needs or selling needs.
B.They are generally public entities owned by that company.
C.They support for buying needs (many to one, or buy-side).
D.They support for selling needs (one to many, or sell-side)
As in e-commerce, m-commerce B2C applications are concentrated in each of the following areas EXCEPT:
A.retail shopping for products and services
B.telecommunications
C.targeted advertising
D.providing content for a fee through mobile portals
All of the following about wireless wide area networks (WWAN) are true EXCEPT:
A.The single WWAN network standard insures compatibility of handsets within and between countries.
B.Most WWANs are cellular phone networks.
C.At the center of each cell is a base station transceiver or cell tower that is used to send and receive signals to and from mobile devices operating within the cell.
D.When a device is turned on, a SIM card inside the device identifies itself to the WWAN.
Which of the following is an example of edutainment?
A.Two or more students sharing music over the Internet
B.An online science fiction game whose object is to blast as many aliens as possible in a 60 second round
C.A community college providing an online college course on digital media
D.An online game that uses colorful characters to teach young children about numbers
Which of the following statements about blogs is not true?
A.A blog is a personal Web site, open to the public, in which the owner expresses his or her feelings or opinions.
B.Blogs became very popular after the September 11, 2001 terrorist attacks when people were looking for as many sources of information as possible and for personal connections to the tragedy.
C.Blogs are limited to one-way communication.
D.The most common types of blogs are professional blogs.
P2P systems have all of the following key characteristics EXCEPT:
A.They provide for real-time access to other users through techniques such as instant messaging and multichannel collaboration applications.
B.The users' computers can act as both clients and servers.
C.The overall system is well integrated, but lacks tools for easy creation of content or for adding functionalities.
D.They support cross-networking protocols such as SOAP or XML-RPC, which enables a program on one computer to execute a program on a server computer.
More and more people are willing to pay for digital music, as shown by the success of ________.
All of the following are examples of e-government EXCEPT:
A.a company sells army and navy surplus supplies at auction over the Internet.
B.a contractor submits an application for a building permit using a city hall Web site.
C.an unemployed worker consults a Web site operated by the state employment department to learn about job openings in his city.
D.a state purchasing officer places an online order for office supplies from an e-catalog sent to her by a national office supply store.
A(n) _____ is a computer system capable of integrating, storing, editing, analyzing, sharing, and displaying spatial information.
A.geographical information system
B.global positioning system
C.l-commerce system
D.on-star system
Which of the following statements about blogs is not true?
A.A blog is a personal Web site, open to the public, in which the owner expresses his or her feelings or opinions
B.Blogs became very popular after the September 11, 2001 terrorist attacks when people were looking for as many sources of information as possible and for personal connections to the tragedy
C.Blogs are limited to one-way communication
D.The most common types of blogs are professional blogs
P2P systems have all of the following key characteristics EXCEPT:
A.They provide for real-time access to other users through techniques such as instant messaging and multichannel collaboration applications
B.The users' computers can act as both clients and servers
C.The overall system is well integrated, but lacks tools for easy creation of content or for adding functionalities
D.They support cross-networking protocols such as SOAP or XML-RPC, which enables a program on one computer to execute a program on a server computer
The tasks of KM include each of the following EXCEPT:
A.creating knowledge repositories where knowledge can be stored and retrieved easily
B.enhancing a knowledge environment in order to conduct more effective knowledge creation, transfer, and use
C.restricting knowledge access to prevent its transfer between individuals
D.managing knowledge as an asset so as to increase the effective use of knowledge assets over time
_______ involves using various computer-based tools and techniques to analyze transaction data and generate new ideas
A.Knowledge creation
B.Knowledge capture
C.Knowledge classification
D.Knowledge management
Most universities use e-learning:
One initiative underway that could lead to widespread support for the introduction of RFID is the _____, which identifies the manufacturer, producer, version, and serial number of each item and does not require line-of-sight contact to be read.
Wal-Mart and Levi Strauss collaborate on demand forecasting in order to optimize the flow of materials along the supply chain. This is an example of:
A.reducing design cycle time
B.APS (Advanced Planning and Scheduling)
C.CPFR (Collaborative Planning, Forecasting and Replenishment)
D.reducing product development time
A major block in the widespread implementation of collaborative commerce is:
A.the theory of collaborative commerce hasn't been proven effective in real-world applications.
B.the technology needed isn't available.
C.collaborative commerce is extremely expensive.
D.the lack of universally accepted standards.
When you have a potential IoT idea you want to develop properly, what must you first define?
A.Its Unique Value Proposition
B.Problem it sets out to solve
C.Route to market
D.How it will work
What is used to uniquely identify devices connected to the Internet?
A.gateway address
B.IP address
C.device name
D.URL
What data security concerns do IoT devices pose?
A.The device being hijacked to harm another device or system
B.Because they are small and low powered, they can't carry much software including security software leaving them open to data theft or disruption
C.The devices being small and embedded into objects makes them easily vandalised or stolen
Which of the following IS NOT a characteristic of semiconductors?
A.They are better conductors than insulators.
B.They can be contaminated to improve their semiconductor properties.
C.They are abundantly found in nature.
D.Their semiconductor properties change as materials age.
E.All of the above.
A circuit involving a diode is powered with a 60 Volt peak-to-peak triangular signal, as shown in the following figure:
Assuming that the forward bias voltage of the diode is 0 V, which of the following graphs is a correct representation of Vout?
A.
B.
C.
D.
A 2V square signal is applied to a circuit that turns a Bipolar Junction Transistor (BJT) into a switch, as shown in the following figure:
Assuming that the BJT's voltage from collector to emitter at saturation (VCEsat) is equal to 0.2V, which of the following graphs is the correct representation of Vout?
A.
B.
C.
D.
Which of the following statements about sensors and actuators are true? (select 3):
A.Transducers change their physical properties in response to changes in the environment.
B.The Wheatstone Bridge converts a change in resistance into a change in voltage.
C.All sensors use instrumentation amplifiers.
D.Analogue to digital converters are needed to convert numbers produced by a computer into signals that can control actuators.
E.Strain gauges could be used to detect deflection in a concrete beam.
Which of the following sensors could be used to detect if an airplane is flying in cruise mode (horizontally), or if it is taking off or landing? (select 2):
A. A tilt sensor
B. A 3-axis accelerometer
C. A 3-axis gyroscope
D. A radar
E. A 3-axis magnetometer
Which of the following IS NOT criteria to help select a wired communication protocol?
A. Speed
B. Number of wires per connection
C. Ability to transmit and receive information at the same time
D. Number of devices that need connecting
F. Maximum distance between master and slaves
E. Distance to the nearest power point
Which of the following statements about communication protocols are true? (select 2):
A. Multi-drop and multi-point are the same thing, but one is American and the other is European nomenclature.
B. In a multilayer network, peers in one layer can listen but cannot talk directly to the peers in other layers.
C. In master-slave networks, the master can listen to only one slave at a time.
D. In master-slave multi-drop networks, all slaves can listen to the master at the same time.
E. In SPI networks, the number of devices that can be included is only limited by the length of the wires and the physical space in the board.
Most IoT systems utilise microcontroller units (MCUs) to collect data and transfer it to the processing units through the Internet. The advantages of using MCUs include: (select 3)
A. They are relatively simple to use, as MCUs do not require an operating system to function and are easy to interface with external components such as sensors.
B. An MCU is usually sufficient to provide processing power and functionality in most IoT systems, thus making it economically viable for IoT applications.
C. Due to their simplicity, MCUs are less vulnerable to security attacks.
D. MCUs normally run an operating system, which reduces development time.
E. MCUs can process and store large amounts of data locally.
If we intend to include a servo motor as an actuator, what feature should we include when selecting a microcontroller?
A. Analogue to Digital converter
B. Digital to Analogue converter
C. GPIO pins
D. Pulse Width Modulation pin
E. I2C pins
Which of the following should be considered when implementing a low power IoT device (or, which attributes will impact power usage on an IoT device)? (select 3)
A. Clock rate of the CPU
B. Sensor resolution
C. Number of attached sensors
D. Supply voltage
E. RAM
In an IoT smart home system, sensors are connected to the home power outlet and are required to process some part of the collected data. What would be the best option to connect sensors to each other, as well as a central location for Internet connection, where high data rate is required?
A. Bluetooth
B. 6LowPAN
C. WiFi
D. LoRa
From the list below, which are the two LPWAN technologies?
A. LoRa
B. WiFi
C. LTE
D. Sigfox
E. 6LowPAN
Fill in the blank: System _________________ can be a major problem, especially in badly designed closed-loop systems, as they may try to over-correct any errors which could cause the system to lose control and oscillate.
A. stability
B. scalability
C. security
D. useability
E. feedback
Which terminology deals with the excitation or stimulus applied to a system from an external source, for the generation of an output?
A. Input signal
B. Output signal
C. Error signal
D. Analogue signal
E. Feedback signal
Which of the following is an example of a closed loop system?
A. Dishwashing machine
B. Air-conditioning unit
C. Bread toaster
D. Electric hand drier
E. Automatic door opener
Which statements best describes the 'Block Diagram' representation of systems? (select 3)
A. Block diagrams are a series of interconnected black boxes that contain the details of complex components of an electronic system.
B. Block diagrams are used to reduce the complexity of electronic systems by packaging details within 'black boxes'.
C. Block diagram components may represent individual components or complete sub systems.
D. Block diagrams increase the complexity of electronic systems by packaging details within 'black boxes'.
E. Block diagrams are seldom used in IoT systems.
One advantage of a closed loop feedback system is:
A. Simplicity of design
B. Ability to react to disturbances in the system
C. It is less stable than an open loop system
D. Depends on calibration for accuracy
E. All of the above
Which six of the following statements are TRUE?
A. Things in the IoT have some intelligence and the ability to exchange information with other things.
B. Electricity is a form of thermal energy.
C. According to Ohm's Law, the higher the voltage, the smaller the resistance.
G. Bipolar Junction Transistors (BJTs) are widely used in modern digital electronics because they consume a negligible amount of current during transitions.
I. A 10-bit DAC, with a reference voltage of 5 volts, cannot produce positive and negative voltages
D. For a given voltage, a small resistance allows the flow of more electric current than a big resistance.
E. Capacitors and inductors store energy.
F. Diodes behave like a small resistor when they are forward biased.
H. Increasing the sampling rate of an ADC would increase the quality of the acquired signal.
J. The Arduino Uno microcontroller board has all the hardware necessary to implement a simple IoT thing.
Which five of the following statements about the end of the line things are TRUE?
A. Open loop control systems are more complex than closed loop control systems.
B. Transducers change one of their properties in response to changes in the environment.
C. All sensors require an analogue front-end (instrumentation amplifier).
D. A microphone is a kind of actuator.
E. A light-emitting diode (LED) is a kind of actuator.
F. The living lab at Curtin University uses vibration sensors to detect and measure movement in elevated walkways.
G. All IoT things have sensors and/or actuators.
H. The Ethernet is widely used to communicate IoT things over short distances.
I. RS-232 offers the fastest throughput in wired communications over short distances.
J. I2C simplifies the interconnection of components in a printed circuit board.
If communication to multiple slave subsystems is required, which communication protocols would be suitable? (select 3)
A. Serial RS232
B. USB
C. SPI
D. I2C
Fill in the blank. If we want to measure the temperature of a solution in a chemical process to within 0.1 degree Celsius, over a range of 100 degrees, our development board would need a ____________ converter to meet that requirement for accuracy.
A. 8 bit
B. 10 bit
C. 16 bit
D. 32 bit
PID is a form of control with 3 feedback methods: Proportional, Integral, and Derivative. What is the purpose of each term?
A. P corrects accumulation of errors, D instances of errors, I counteracts overshoot caused by P and D
B. I corrects accumulation of errors, D instances of errors, P counteracts overshoot caused by D and I
C. D corrects accumulation of errors, P instances of errors, I counteracts overshoot caused by D and P
D. D corrects instances of errors, P corrects accumulation of errors, I counteracts overshoot caused by D and P
E. P corrects instances of errors, I corrects accumulation of errors, D counteracts overshoot caused by P and I correct
