Mobile Applications ISE Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is a key UX consideration when designing a mobile app for controlling multiple IoT devices?

   • ARequiring users to navigate to a separate screen for each device
   • BProviding a unified dashboard that shows the status of all devices at a glance
   • CHiding device status to reduce clutter
   • DUsing technical jargon in labels to be precise
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   Which design principle is most important for ensuring that a mobile IoT app is usable by people with visual impairments?

   • AHigh-contrast color schemes and support for screen readers
   • BComplex navigation menus to provide more options
   • CFast animation effects for visual feedback
   • DSmall touch targets to fit more controls on screen
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A logistics company uses a mobile app for warehouse staff to scan barcodes and receive real-time inventory updates. The warehouse has unreliable internet, but there is a local edge server that caches inventory data. The company wants the app to remain functional during internet outages and to sync data when connectivity returns. Which architecture best meets this requirement?

   • AApp uses a peer-to-peer mesh between phones to share inventory data without any central server
   • BApp uses Bluetooth to connect to a nearby IoT gateway that stores all data locally and never syncs to the cloud
   • CApp talks directly to the cloud only, and any offline work is lost
   • DApp uses a local edge server for reads/writes and syncs changes to the cloud when connectivity is available
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   A team is developing a mobile app that controls a fleet of industrial robots via MQTT. They have a limited budget and need to test the app's behavior under various network conditions (high latency, packet loss, broker disconnects) and with different robot firmware versions. They cannot afford a large physical test lab. Which testing approach gives the best coverage for the money?

   • AUse a network simulator (e.g., a fault-injection proxy) with a simulated MQTT broker and virtual robots
   • BTest only on real robots in the field, even though it is expensive and slow
   • CRely on unit tests only, without integration or network-level testing
   • DUse a cloud-based device farm that provides real phones but no network fault injection
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A smart factory is deploying a mobile app for maintenance technicians to monitor and control robotic arms on the factory floor. The robotic arms generate large amounts of sensor data that need to be processed in real-time to detect anomalies. The factory has a reliable local network but limited bandwidth to the cloud. Which architecture best supports real-time monitoring while minimizing cloud bandwidth usage?

   • AHave the app connect directly to each robotic arm and process the sensor data on the mobile device.
   • BStream all sensor data to the cloud for processing and have the app retrieve processed results from the cloud.
   • CProcess sensor data on an edge gateway and have the app communicate with the edge gateway for real-time monitoring, while sending only aggregated summaries to the cloud.
   • DUse a peer-to-peer network between the robotic arms and the app, bypassing the cloud and edge gateway entirely.
   Reveal Solution Discussion Select an answer first