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Huawei H14-231_V1.0 Practice Test - Questions Answers, Page 69

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Question 681

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When a developer develops an application based on HarmonyOS, the data used by a developer can be decomposed into multiple objects. The developer needs to add, delete, modify, and check the teaching data, but does not want to write overly complex SQL statements. In this scenario, the developer can use an object-relational mapping database to process the data.

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Question 682

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In HarmonyOS, both relational databases and object-relational mapping databases can use SQL statements to manipulate databases.

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Question 683

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Intent is a carrier for transmitting information between objects.

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Question 684

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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.

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Question 685

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The callback mechanism provided by the Ability class can enable the Page instance to switch in the background following the user's operation.

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Question 686

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Operations such as the display and update of the UI interface are carried out on the main thread, so the main thread is also called the UI thread.

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Question 687

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When a developer starts a music player on a remote device, he or she may not fill in the Deviceld of the remote device.

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Question 688

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If a developer sets a distributed tag Intent.FLAG_ABILITTSLICE_MULTI_DEVICE in the Intent, what does the tag mean?

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Question 689

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HarmonyOS is a distributed operating system that can be deployed on mobile phones and embedded devices.

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Question 690

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What problems do developers need to think about each basic element when building page layouts in JavaScript UI frameworks?

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After the page is jumped or overwritten, it will enter the INACTIVE state, but the resources will not be released, and when the page switches back to the ACTIVE state, the click event will still respond normally.
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When a developer is developing an online education application, in order to improve the user experience, if the user Answer:s the question correctly, a dialog box of 'Congratulations on the correct Answer:' will pop up at the top of the window.
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Which of the following sorting types does the trusted list of devices found by HarmonyOS Device Manager contain?
fter a developer sets :ohos:layout_alignment='horizontal_center' in the Text component, he writes: text.setMarginRight (600) in the code, where is the Text displayed in the parent layout?
After developing a HarmonyOS application, the developer needs to package the application into an app for publishing it to AppGallery. You can use DevEco Studio to generate a key, in what format is the key stored in the keystore file?
When the system creates a page instance for the first time, which method will be called?
When is the aboutToAppear() of the custom component executed?