Tutorial 8

Interactive Phase 2 quiz lab.

The Phase 2 quiz checks app-flow reasoning: navigation, state, storage choices, and user-facing error behavior.

Multi-select: states a catalogue app should handle

Question: Which UI states should a network-backed catalogue handle?

Loading while data is fetched. Empty result after search or filter. Silent failure with a blank screen. Error with retry when the request fails.

Drag the steps into the correct sequence. Use move buttons on touch devices.

Back returns to the previous list state

User taps a business row

Detail screen loads business by id

Navigate with the business id route argument

Selected language Favourite business ids Fresh server catalogue Sort preference

Find the user-facing problem before checking the explanation.

if (businesses.isEmpty()) {
    // Do nothing
} else {
    BusinessList(businesses)
}