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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( 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


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