Get All Modules Introduction to the Internet of Things and Embedded Systems Quiz Answers
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Introduction to the Internet of Things and Embedded Systems Module 01 Quiz Answers
Q1. My watch displays the current weather downloaded from the Internet. My watch is an IoT device.
- True
Explanation: An IoT device is any device connected to the internet to exchange data. A smart watch fetching weather data online is an example of an IoT device.
Q2. Which of the following could be an IoT device?
- all of the above
Explanation: An IoT device can be any physical object with sensors, software, and connectivity that allows it to interact with other systems. Lamps, couches, and pens can all become IoT devices if equipped accordingly.
Q3. An IoT device can most easily be differentiated from a standard computer based on
- the interface with the user and the world
Explanation: IoT devices focus on interacting with their environment through sensors and actuators rather than traditional input/output methods like keyboards or screens.
Q4. The following trend is NOT related to the growth in IoT technology:
- Increase in computer monitor size over time.
Explanation: IoT growth is driven by trends such as improved performance, miniaturization, and cost reduction. Monitor size is unrelated.
Q5. IoT devices are likely to be more vulnerable to cyberattacks than standard computers.
- True
Explanation: IoT devices often have limited resources for security measures and may lack regular updates, making them more vulnerable.
Q6. Which of these security approaches is feasible for most IoT devices?
- Regular installation of product firmware updates.
Explanation: Firmware updates often include security patches, which are crucial for protecting IoT devices. Other measures like internal firewalls or anti-virus software are not commonly used in IoT.
Q7. IoT devices gather private information about users. Which statement is most true about the security of that data?
- Users must rely on data-collecting agencies to securely store and transmit their data.
Explanation: Data security for IoT largely depends on the systems and practices of the companies managing the data, as users often lack direct control over it.
Q8. Although people are aware of the dangers of cyberattacks, they often do not understand the risks to IoT devices.
- True
Explanation: Many users underestimate the vulnerability of IoT devices, focusing more on traditional computers for cybersecurity concerns.
Introduction to the Internet of Things and Embedded Systems Module 02 Quiz Answers
Q1. A light sensor (photoresistor) is an analog sensor.
- True
Explanation: A photoresistor produces a continuous range of resistance values based on light intensity, making it an analog sensor.
Q2. A microphone is a digital sensor.
- False
Explanation: Microphones convert sound waves into analog electrical signals, which may later be digitized by an ADC.
Q3. A push-button is an analog sensor.
- False
Explanation: A push button is a digital sensor as it only has two states: pressed (ON) or not pressed (OFF).
Q4. A keyboard is a digital sensor.
- True
Explanation: A keyboard detects key presses and sends discrete digital signals to the computer, corresponding to each key.
Q5. Which of the following components are actuators? Select all that apply.
- a servo motor
- an LED
- a heating element
Explanation:
- Servo motor: Converts electrical signals into mechanical movement.
- LED: Converts electrical energy into light.
- Heating element: Converts electrical energy into heat.
Thermometers and CMOS cameras are sensors, not actuators.
Q6. The component of an embedded system that executes a program is:
- a microcontroller
Explanation: A microcontroller is a small computer on a chip that runs programs to control embedded systems.
Q7. An analog-to-digital converter is common in embedded systems because
- many sensors are analog while the microcontroller is digital.
Explanation: Sensors like temperature or light sensors output analog signals, which must be converted into digital data for processing by a microcontroller.
Q8. Consider the anti-lock braking system in a car. What are the main sensors and actuators of this system from the perspective of the driver?
- brake pedal and brake calipers and pads
Explanation:
- Brake pedal: Acts as the input device (sensor).
- Brake calipers and pads: Act as actuators to apply pressure to the brakes.
Introduction to the Internet of Things and Embedded Systems Module 03 Quiz Answers
Q1. Under what conditions should an integrated circuit be used in an IoT device?
- When highest performance is required.
- When lowest power is required.
- When the function is already commonly available as an integrated circuit.
Explanation: Integrated circuits (ICs) are preferred when performance and power efficiency are critical, or when a common function is readily available in an IC, reducing development time and cost.
Q2. Given a choice between implementing a function as an integrated circuit (in hardware) or as a program (in software), what factor needs to be considered the least?
- The physical look of the final device.
Explanation: The physical appearance usually has minimal influence on the decision. Factors like cost, design time, and performance are much more important.
Q3. Generally, in a computer-based system, the main memory is much larger than the cache.
- True
Explanation: Main memory (RAM) is designed to be larger but slower, while cache is much smaller and faster to provide quick access to frequently used data.
Q4. What is the fastest type of storage in a computer-based device?
- Registers
Explanation: Registers are the fastest type of storage, located directly within the CPU, followed by cache and main memory.
Q5. Which statement is false?
- Machine language is universal, allowing programs written in machine language to be executed on any microprocessor.
Explanation: Machine language is specific to each type of microprocessor, meaning programs must be rewritten for different architectures.
Q6. What does an assembler generate?
- Machine code from assembly code.
Explanation: An assembler converts human-readable assembly instructions into machine code executable by the processor.
Q7. Compiled code generally executes faster than interpreted code.
- True
Explanation: Compiled code is translated directly into machine language before execution, while interpreted code is translated during execution, making it slower.
Q8. Which of the following is NOT a benefit of using an operating system?
- The frequency of the microcontroller clock can be significantly increased.
Explanation: The clock frequency is a hardware characteristic and not directly influenced by the presence of an operating system.
Introduction to the Internet of Things and Embedded Systems Module 04 Quiz Answers
Q1. What protocols are required for Internet communication?
- TCP or UDP/IPare turned on often, for small bits of work
Explanation: The Internet relies on the TCP/IP protocol suite for communication. TCP and UDP operate at the transport layer, while IP handles addressing and routing at the network layer.
Q2. Which network device copies packets onto all ports?
- hub
Explanation: A hub broadcasts incoming packets to all its ports, unlike switches or routers that direct packets based on MAC or IP addresses.
Q3. What is the protocol associated with the worldwide web?
- HTTP
Explanation: HTTP (Hypertext Transfer Protocol) is the primary protocol for accessing and transferring web resources.
Q4. A MANET protocol is likely to differ from a typical LAN protocol because a MANET protocol will
- consume less power than a typical LAN protocol.
Explanation: MANET (Mobile Ad Hoc Network) protocols are designed to operate in dynamic, resource-constrained environments, prioritizing energy efficiency and adaptability.
Q5. The function of a packet header is to
- contain packet information generated by a protocol layer.
Explanation: A packet header contains metadata like source/destination addresses, sequence numbers, and protocol-specific details necessary for transmission and delivery.
Q6. A packet sniffer is a tool that can be used to record all local traffic on a network.
- True
Explanation: Packet sniffers capture and analyze network traffic, which can help with debugging, network management, or security analysis.
Q7. A hub can be used to communicate between two LANs with different protocols.
- False
Explanation: A hub simply forwards packets within a single LAN and does not translate between different network protocols. Bridges or routers are needed for such tasks.
Q8. In the HTTP protocol, a request message is sent by a web client to a web server.
- True
Explanation: In HTTP, clients (browsers) send request messages to servers to retrieve web resources such as HTML pages or images.
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The Arduino Platform and C Programming Quiz Answers
All Quiz Answers of An Introduction to Programming the Internet of Things (IoT) Specialization Course
Course 1: Introduction to the Internet of Things and Embedded Systems
Course 2: The Arduino Platform and C Programming
Course 3: Interfacing with the Arduino
Course 4: The Raspberry Pi Platform and Python Programming for the Raspberry Pi
Course 5: Interfacing with the Raspberry Pi
