Introduction to the Internet of Things and Embedded Systems : Coursera Quiz Answers 2023

Week 1 Quiz Answers

1.

My watch displays the current weather downloaded from the Internet. My watch is an IoT device.

1 point

True

False

2.

Which of the following could be an IoT device?

1 point

a lamp

a couch

a pen

all of the above

3.

An IoT device can most easily be differentiated from a standard computer based on

1 point

computational performance

memory capacity

interface with the user and the world

weight/size

4.

The following trend is NOT related to the growth in IoT technology:

1 point

Increase in computer monitor size over time.

Increase in computer performance over time.

Decrease in computer size over time.

Decrease in computer cost over time.

5.

IoT devices are likely to be more vulnerable to cyberattacks than standard computers.

1 point

True

False

6.

Which of these security approaches is feasible for most IoT devices?

1 point

Use of anti-virus software.

Use of an internal firewall.

Regular installation of product firmware updates.

Complete separation of the device from the Internet.

7.

IoT devices gather private information about users. Which statement is most true about the security of that data?

1 point

Users can ensure security of collected data by encrypting it manually.

Users must rely on data-collecting agencies to securely store and transmit their data.

Users can sue data collecting agencies if their data is not held securely.

Most data gathered by IoT devices is safe because IoT devices are not a target of hackers.

8.

Although people are aware of the dangers of cyberattacks, they often do not understand the risks to IoT devices.

1 point

True

False

Week 2 Quiz Answers

1.

Question 1

A light sensor (photoresistor) is an analog sensor.

1 point

True

False

2.

Question 2

A microphone is a digital sensor.

1 point

True

False

3.

Question 3

A push button is an analog sensor.

1 point

True

False

4.

Question 4

A keyboard is a digital sensor.

1 point

True

False

5.

Question 5

Which of the following components are actuators? Select all that apply.

1 point

a servo motor

a thermometer

an LED

a CMOS camera

a heating element

6.

Question 6

The component of an embedded system that executes a program is:

1 point

an FPGA

an analog-to-digital converter

a microcontroller

a sensor/actuator pair

7.

Question 7

An analog-to-digital converter is common in embedded systems because

1 point

many sensors are analog while the microcontroller is digital.

analog computation is faster than digital.

analog computation uses less battery power than digital computation.

digital data is generally more compact than analog.

8.

Question 8

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?

1 point

accelerator pedal and turn signal

gearshift and dashboard monitor

brake pedal and steering wheel

brake pedal and brake calipers and pads

Week 3 Quiz Answers

1.

Question 1

Under what conditions should an integrated circuit be used in an IoT device?

1 point

When highest performance is required.

When lowest power is required.

When the function is already commonly available as an integrated circuit.

All of the above.

2.

Question 2

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?

1 point

The cost of manufacturing the integrated circuit.

The required time to design the integrated circuit vs. the program.

The performance required of the final product.

The physical look of the final device.

3.

Question 3

Generally, in a computer-based system, main memory is much larger than cache.

1 point

True

False

4.

Question 4

What is the fastest type of storage in a computer-based device?

1 point

Registers

Cache

Flash

Main memory

5.

Question 5

Which statement is false?

1 point

A programmer may write assembly code directly if performance is very important.

High-level languages are generally easier to program in than assembly language.

Machine language is universal, allowing programs written in machine language to be executed on any microprocessor.

Assembly code is easier to read than machine code.

6.

Question 6

What does an assembler generate?

1 point

Machine code from assembly code.

Assembly code from a high-level language.

Assembly code from machine code.

Machine code from a high-level language.

7.

Question 7

Compiled code generally executes faster than interpreted code.

1 point

True

False

8.

Question 8

Which of the following is NOT a benefit of using an operating system?

1 point

Many programs can execute on the same processor at the same time.

The frequency of the microcontroller clock can be significantly increased.

The operating system provides a convenient programming interface to the hardware.

The operating system enables separation between multiple processes.

Week 4 Quiz Answers

1.

Question 1

What protocols are required for Internet communication?

1 point

TCP or UDP/IP

Ethernet/Token Ring

HTTP/Ethernet

FTP/HTTP

2.

Question 2

Which network device copies packets onto all ports?

1 point

router

hub

switch

bridge

3.

Question 3

What is the protocol associated with the world wide web?

1 point

HTTP

FTP

TCP

SMTP

4.

Question 4

A MANET protocol is likely to differ from a typical LAN protocol because a MANET protocol will

1 point

ensure greater connectivity than a typical LAN protocol.

have higher bandwidth than a typical LAN protocol.

consume less power than a typical LAN protocol.

support more nodes than a typical LAN protocol.

5.

Question 5

The function of a packet header is to

1 point

contain packet information generated by a protocol layer.

mark the ending of the previous packet.

store an encrypted version of the packet’s contents.

all of the above.

6.

Question 6

A packet sniffer is a tool that can be used to record local traffic on a network.

1 point

True

False

7.

Question 7

A hub can be used to communicate between two LANs with different protocols.

1 point

True

False

8.

Question 8

In the HTTP protocol, a request message is sent by a web client to a web server.

1 point

True

False