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Huawei H14-231_V1.0 Practice Test - Questions Answers, Page 50

Question list

List of questions

Question 491

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The following description of the basic components of the ArkTS declarative development paradigm is correct

Question 492

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Regarding the Tabs component and the TabContent component, the following description is correct

Question 493

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The description of the ForEach(arr,itemGenerator,index) component is correct

Question 494

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Which of the following properties can be used for components that contain text elements, such as Text, Button, TextInput, etc.?

Question 495

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Which of the following component hierarchies are correct

Question 496

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How do I create a new project in DevEco Studio?

Question 497

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Which of the following information is included in the module.json5 configuration file?

Question 498

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Which of the following functions is a lifecycle function for a custom component?

Question 499

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Which of the following decorators can be used to manage the state of variables in custom components?

Question 500

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API9 and above, router.pushUrl() method mode parameter can be configured to which of the following modes used by the jump page?

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 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 ?

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.

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

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

Question 491

The following description of the basic components of the ArkTS declarative development paradigm is correct

Decorator: Used to decorate classes, structs, methods, and variables to give them a special meaning, e.g. @Entry indicates that this is an entrance component.

Custom components: Reusable UI units that can be combined with other components.

UI Description: A declarative method to describe the structure of the UI, such as a code block in the build() method.

Built-in components: Built-in basic components and layout components in ArkTS by default, such as Column, Text, Divider, Button, etc., can be called by developers.

attribute method: used to configure component attributes, which are set through attribute methods, such as fontSize(), width(), height(), color(), etc.

Event method: It is used to add the component's response logic to the event, which is set through the event method, such as onClick() following the Button.

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Question 492

Regarding the Tabs component and the TabContent component, the following description is correct

TabContent component does not support setting a generic width property, and its width is equal to the barWidth property of the Tabs component.

The TabContent component does not support setting the general height attribute, and its height is determined by the height of the parent Tabs and the height of the TabBar component.

TabsController is used to control tabs to switch between tabs, and does not support one tabscontroller to control multiple tabs.

The tabBar property of the TabContent component supports components generated using the @Builder constructor.

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Question 493

The description of the ForEach(arr,itemGenerator,index) component is correct

ForEach can loop through logical code, such as console.info ('hello').

The first parameter must be an array, providing a data source for circular rendering.

The second parameter generates the lambda function of the child component, which generates the child component for each array item in the data source.

The third parameter is an anonymous function that generates a unique and stable key value for a given array item.

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