HarmonyOS's relational database and object relational mapping database are both based on SQLite.
Correct : A
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HarmonyOS maintains a stack of AbilitySlice instances for each Page, and each AbilityS1ice instance that enters the foreground will be added to the stack.
Correct : A
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HarmonyOS provides the NFC message notification function, through which developers can obtain the message of the NFC switch state change and the NFC field strength message.
Correct : A
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The way to find the object of the control declared in the Layout file by ID in HarmonyOS is findComponentByld().
Correct : A
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When MainAbility and MainAbiitySlice are bound together, the lifecycles of the two are synchronized, including the callback method for transitioning between states.
Correct : B
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