Robots are coming! Build IoT apps with Watson, Swift, and Node-RED Quiz Answers

Get Robots are coming! Build IoT apps with Watson, Swift, and Node-RED Quiz Answers

Learn how to program a simple robot (TJBot) to move its arm, recognize objects, flash a light, speak, and more. You can build simple apps to control TJBot by using Node.js or even Node-RED. If you don’t want to purchase the TJBot, you use a simulator instead.

In this hands-on Internet of Things (IoT) course, you’ll build Node-RED flows (applications) running on the cloud and connect them to more flows and Swift applications. You’ll use those applications to track the temperature of a Raspberry Pi CPU, store that data in a Cloudant NoSQL database, take pictures with the RaspCam, use AI to recognize objects in the pictures, send Twitter notifications, and send simple commands from your smartphone to a robot called iRobot Create 2. You don’t need to purchase the iRobot to be successful in this course. But playing with a programmable robot can be a lot more fun!

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Lab 1: Read temperature data from an IoT sensor

Question: In Lab 1, what is the main purpose of the Internet of Things Platform Starter?

To provide a boilerplate application in Node-RED
To facilitate communication between the Node-RED instance running on the Raspberry Pi and the instance running on IBM Cloud
To send data from an iOS device to Twitter
To create a Cloudant database

Question: In Lab 1, where exactly does the Swift UI get the temperature data from?

Directly from the temperature senson device
From a node in the Node-RED flow
From the Cloudant database
From the IoT QuickStart

Question: What imported library is required for you to do CRUD operations on the Cloudant database in IBM Cloud?

SwiftDBCloudant
CloudantSwift
SwiftyDB
SwiftCloudant

Question: In Lab 1, why did you need two Node-RED flows?

To get sensor data (flow 1) and then to send it to IBM Cloud (flow 2)
To set up a Cloudant database (flow 1) and then send it IBM Cloud (flow 2)
To get sensor data (flow 1) and then send it to the IoT Platform QuickStart (flow 2)
None of these

Question: In which Node-RED node do you initially enter a device ID? In this lab, the device ID is from the virtual temperature sensor.

IBM IoT App Out
msg.payload
IBM IoT App In
GetCPUtemp

Lab 2: Add a camera and analyze images

Question: How is Watson Visual Recognition used by the Raspberry Pi in an IoT environment?

Pictures taken by the Raspberry Pi camera are sent in bulk to the cloud and matched against existing pictures.
Pictures taken by the Raspberry Pi camera are matched against existing pictures on the Raspberry Pi. The result is communicated to the cloud.
Single pictures taken by the Raspberry Pi camera are sent to the cloud and processed by the deep learning network trained on existing pictures.
Pictures taken by the Raspberry Pi camera are minimized on the Raspberry Pi before being sent to the cloud for comparison with existing pictures.

Question: The Visual Recognition service uses machine learning to recognize and classify visual content.

True
False

Question: MQTT cannot be used to pass data through firewalls.

True
False

Question: What action does the following Swift code perform?

  DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(10), execute: {
            // Put your code which should be executed with a delay here
            NSLog("Read doc: 10 sec")
            self.imageFromDb.image = self.fetchedImage as UIImage
        })

Updates the Cloudant database with a new picture
Shows a picture on a mobile device
Creates buttons in your mobile UI
Sends a picture to the Visual Recognition service

Question: In Node-RED, output nodes have the logo on the left side of the node.

True
False

Lab 3: Connect your app to an iRobot and smartphone

Question: Which one of the following SDKs helps to simplify how you use cognitive services with Swift applications?

Text-to-speech-swift
Watson-Developer-Cloud SDK for iOS
SwiftyJSON SDK
IBM Cloud Services SDK for iOS

Question: What’s the purpose of the WeatherData.swift file?

Adds the encoding for the network
Connects the Text to Speech service to the iRobot
Manages the connectivity to the Text to Speech service
Manages the connectivity to the Weather Company Data service

Question: The Watson IoT Platform starter automatically deploys and connects which of these services. Select all that apply.

Watson IoT Platform
Weather Company Data service
IBM SDK for Node.js for IBM Cloud
IBM Cloudant for IBM Cloud

Question: To manipulate JSON, you added which framework to the XCode project?

SpeechToTextV1.framework
RestKit.framework
SwiftyJSON.framework
BMSCore.framework

Question: What additional data can you find in the Weather Data JSON?

Conditions for playing golf
Conditions for skating
Conditions for hiking
Conditions for swimming
Conditions for running

Final Exam

Question: Which of the following data types can be be sent from an IoT sensor to the cloud for further processing? Select all that apply.

Temperature
Humidity
Air pressure
Seismometer data
Text

Question: What is the lightweight protocol that is used for communication between a Raspberry Pi device and a cloud application?

TCP/IP
HTTP
MQTT
MSP

Question: Which Watson services can you use to build a voice user interface to access IoT devices?

Speech to Text
Real-time Audio conversion
Text to Speech
Voice routing over the Internet

Question: You typically need to install a node package to get Cloudant database nodes in Node-RED.

True
False

Question: How does BM Watson Visual Recognition determine what’s in an image?

By analyzing the file names of images
By deciding what categories the image and the parts of an image fall into
By reading what users post on social media about an image
By querying the user who submitted the image

Question: In this course, how did you connect the Raspberry PI to the iRobot?

MQTT
The iRobot serial port
HTTP
ICMP

Question: IBM Cloudant is an example of which of the following service types? Select all that apply.

MBaaS
PaaS
SaaS
DBaaS

Question: What action does the following code perform?

iotfSession.send(BEEP_MSG.data(using: String.Encoding.utf8, allowLossyConversion: false),
         topic: CMD_TOPIC,
         qos: MQTTQosLevel.exactlyOnce,
         retain: false)

Sends a dock command to the iRobot
Specifies what encoding to use
Sends a command over an MQTT connection
Sends a command to a smartphone

Question: What method can you use to extend the functionality of Raspbian Jessie?

npm
Configure it with apt-get commands
Download nodes from the Node-RED community
CocoaPods

Question: You can store pictures from a camera or from the Internet by using a Cloudant database.

True
False

Conclusion:

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