Web Communications ISE Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A company wants to allow remote technicians to troubleshoot IoT devices over the internet. The devices are behind a corporate firewall. Which approach is most secure and practical?

   • AUse telnet to access the devices over the internet.
   • BUse FTP to transfer configuration files.
   • CUse a VPN tunnel to the corporate network and then access the devices via their private IPs.
   • DExpose the devices' web interfaces directly to the internet.
   Reveal Solution Discussion Select an answer first
2. 17expert · hard

   A developer is designing a REST API for a smart irrigation system. The API must allow users to start and stop watering zones. The developer is considering using POST /zones/{id}/start and POST /zones/{id}/stop. Which alternative design is more RESTful?

   • AUse PUT /zones/{id} with a JSON body containing the desired state (e.g., {"state":"on"}).
   • BUse GET /zones/{id}/start to start watering.
   • CUse DELETE /zones/{id} to stop watering.
   • DUse POST /zones/{id}/toggle to switch the state.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   Which scenario best illustrates the use of a webhook in an IoT application?

   • AA cloud service stores all doorbell events in a database for later analysis.
   • BA mobile app repeatedly requests the doorbell's status every five seconds to check for motion.
   • CA smart doorbell maintains a continuous WebSocket connection to stream video to the homeowner's phone.
   • DA smart doorbell sends an HTTP POST to a cloud service whenever motion is detected, notifying the homeowner's app.
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A manufacturer wants its smart vending machine to notify the central inventory system immediately when a product is out of stock. The inventory system is a cloud web service that does not maintain a persistent connection to the device. Which approach should the developer implement?

   • AUse MQTT over WebSockets with the vending machine as the broker.
   • BHave the inventory system poll the vending machine every minute using GET requests.
   • CConfigure the vending machine to send an HTTP POST request to a webhook URL provided by the inventory system.
   • DOpen a WebSocket connection from the inventory system to the vending machine.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   Which practice is considered a secure API practice for IoT web communications?

   • AAllowing unlimited failed login attempts
   • BDisabling rate limiting on public endpoints
   • CEmbedding API keys in the URL of every request
   • DUsing API keys in the Authorization header with HTTPS
   Reveal Solution Discussion Select an answer first