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Huawei H14-231_V1.0 Practice Test - Questions Answers, Page 24

Question list

List of questions

Question 231

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Which kind of decorator can be used as a page entry component?

Question 232

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Regarding the callback event of the Video component, the following statement is incorrect

Question 233

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With regard to the characteristics of @State state data, the following description is incorrect

Question 234

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Regarding the position setting of the Tabs component tab, the following is the wrong description

Question 235

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Regarding the boot mode of UIAbility, the following statement is incorrect

Question 236

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With regard to Web components, the following is incorrect

Question 237

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Regarding the container components Row and Column, the following statement is wrong. The main axis of A Column container is vertical, and the cross axis is horizontal;

Question 238

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Which of the following modules needs to be imported for page routing?

Question 239

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In the stage model, what are the following configuration files that belong to the AppScope folder?

Question 240

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What kind of struct is used to decoratively indicate that the structure has the ability to be componentized?

Related questions

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.

Which of the following sorting types does the trusted list of devices found by HarmonyOS Device Manager contain?

In the HarmonyOS system architecture, the distributed data management module belongs to the framework layer.

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?

Which modules in the following figure can be installed and operated independently?

A developer is developing a flight booking application, and uses the sliding selector Picker to select the location of the ticket and writes the following code.

A developer needs to cancel a task, but part of the code segment he wrote was deleted by mistake. The remaining codes are as follows, with the missing codes indicated by the dash: TaskDispatcher dispatcher = getUlTaskDispatcher(); Revocable revocable = ________________________(new Runnable(){ @Overide Public void run(){ HiLog.info(L . ABEL_ _LOG,'delay dispatch'); } },10); Boolean revoked = revocable.revoke(); HiL og.info(L _ABEL_ LOG),'%{public}b' ,revoked); Which of the following might be missing pieces in the above code?

The default size of shared memory in Harmony OS is ?

An engineer uses the WLAN P2P function, and the engineer can establish a P2P group.

Which of the following classes is the base class for JavaScript FA (Feature Ability) to run on HarmonyOS?

Question 231

Which kind of decorator can be used as a page entry component?

@Component

@Entry

@Preview

@Builder

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Question 232

Regarding the callback event of the Video component, the following statement is incorrect

onStart is triggered when the video is playing, and you can get the video duration here.

This event is triggered at the end of the B onFinish video.

This event is triggered when the C onPrepared video is ready.

onUpdate is triggered when the playback progress changes, the unit is s, and the update interval is 250 ms.

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Question 233

With regard to the characteristics of @State state data, the following description is incorrect

State is decorated with a variable that is the internal state data of the component, and when the state data is modified, the build method of the component will be called to refresh the UI.

Properties marked as @State are private variables that can only be accessed within the component

@State variable can be left without an initial value The decorated variables @Link

child components can be bidirectionally bound to the @State variables of the parent component

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Question 234

Regarding the position setting of the Tabs component tab, the following is the wrong description

When barPosition is set to Start (the default value) and the vertical attribute is false (the default value), the tab is located at the top of the container

If barPosition is set to Start (the default value) and the vertical attribute is set to true, the tab is located on the left side of the container

When barPosition is set to End and vertical is set to false (the default), the tab is located at the bottom of the container

When barPosition is set to End and vertical is set to true, the tab is located at the bottom of the container

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Question 235

Regarding the boot mode of UIAbility, the following statement is incorrect

UIAbility supports three launch modes: single-instance, standard-mode, and specified instance, which can be configured in module.json via launchType.

singleton is a single-instance mode, only one instance exists in the system, and if it already exists, the only instance in the system is reused.

standard is the standard mode, and a new instance will be started every time startAbility, and the system defaults to the standard mode.

specified is the specified instance mode, and the internal business of Ability decides whether to create multiple instances during runtime.

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Question 236

With regard to Web components, the following is incorrect

WebController can control various behaviors of web components, such as forward, backward, runJavaScript, etc.

The web component supports the setting of various properties such as fileAccess.javaScriptAccess, for example, .javaScriptAccess(true) indicates that JavaScript scripts are allowed to be executed.

The web component supports a variety of events, such as onConfirm and onConsole, for example, the onConfirm callback is triggered when a web page calls confirm().

The ohos.permission.INTERNET permission is required to access both online and offline web pages using the web component.

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Question 237

Regarding the container components Row and Column, the following statement is wrong. The main axis of A Column container is vertical, and the cross axis is horizontal;

The main axis of the row container is horizontal, and the cross axis is vertical.

The main axis and the cross axis are always perpendicular to each other, and the direction of the Row and Column main axes is different.

The alignment of the subcomponents of the C Column in the direction of the main axis is set using the justifyContent property, and its parameter type is FlexAlign.

The alignment of D Row's subcomponents in the direction of the cross axis is set using the alignltems property, which is of type HorizontalAlign.

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