Each of the following statements about a typical mobile social navigation app is true. Which most captures the essence of the application?

a. The app processes massive amounts of crowdsourced data—that is, the data that’s continuously supplied by users through their mobile GPS-based devices worldwide.
b. The app uses speech synthesis to speak driving directions and alerts to you, and speech recognition to understand your spoken commands.
c. The app uses your phone as a streaming Internet of Things (IoT) device. Each phone is a GPS sensor that continuously streams data over the Internet to the app.
d. The app probably stores its routing information in a graph database. Such databases can efficiently calculate shortest routes.


a. The app processes massive amounts of crowdsourced data—that is, the data that’s continuously supplied by users through their mobile GPS-based devices worldwide.

Computer Science & Information Technology

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