Huawei HCIA-HarmonyOS Application Developer (H14-211) Certification Sample Questions

01. Which ArkUI attribute allows a developer to apply a "blur" effect to the background of a component, similar to frosted glass?
a) .opacity()
b) .backdropBlur()
c) .shadow()
d) .grayscale()

02. How does a UI page communicate data back to its parent UIAbility instance in the Stage Model?
a) UI pages cannot communicate with the Ability.
b) By calling this.parent() in ArkTS.
c) By using the EventHub provided by the AbilityContext.
d) By using global variables.

03. For storing small amounts of user settings, such as "Dark Mode" preferences, which ArkData storage method is most appropriate for high-speed synchronous access?
a) Preferences
b) Distributed Data Service
c) KV Store
d) RDB Store

04. If a UIAbility is currently in the background but hasn't been destroyed, and the user navigates back to it, which lifecycle sequence occurs?
a) onCreate() -> onForeground()
b) onForeground() -> onWindowStageCreate()
c) onBackground() -> onForeground()
d) onForeground() is called directly.

05. Which attribute is used in ArkUI to specify that a component should occupy all remaining space along the main axis of its parent container?
a) .width('100%')
b) .layoutWeight(1)
c) .flexGrow(1)
d) .aspectRatio(1)

06. A developer wants a widget to update its displayed information (e.g., weather or stock price) every 30 minutes. Which configuration field in module.json5 facilitates this?
a) updateEnabled
b) scheduledUpdateTime
c) updateDuration
d) formUpdateInterval

07. When a widget needs to perform a small background logic task (like toggling a smart light) without opening the main app, which postCardAction type should be used?
a) 'call'
b) 'update'
c) 'router'
d) 'message'

08. In the lifecycle of a UIAbility, which callback is the final opportunity for the developer to save transient state data before the ability instance is destroyed by the system?
a) onBackground()
b) onForeground()
c) onDestroy()
d) onWindowStageDestroy()

09. To use the Distributed Data Service for syncing a database across devices, which permission must be requested by the application?
a) ohos.permission.DISTRIBUTED_DATASYNC
b) ohos.permission.INTERNET
c) ohos.permission.KEEP_BACKGROUND_RUNNING
d) ohos.permission.SYNC_DATA

10. What is the primary difference between an Entry HAP and a Feature HAP in a HarmonyOS application package?
a) An application can contain multiple Entry HAPs but only one Feature HAP.
b) Feature HAPs do not require a module.json5 file.
c) Entry HAPs are only for phones; Feature HAPs are only for smartwatches.
d) Entry HAPs contain the main entry point of the app; Feature HAPs provide additional, optional functionality.