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Huawei H14-231_V1.0 Practice Test - Questions Answers, Page 14

Question list

List of questions

Question 131

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Before developing the NFC function, a HarmonyOS developer must first confirm whether the device supports the NFC function and whether the NFC is turned on.

Question 132

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When a developer is developing a HarmonyOS application, if he needs to annotate information for a certain resource file of different types of elements in the Element directory to facilitate the unde

Question 133

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If a HarmonyOS developer has developed multiple applications and ensured that the data between different applications cannot be accessed through the triplet of account, application, and database, wh

Question 134

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When the developer jumps to a new page through the button button, the following code is created. If you don't add '' Button button = (Button) findComponentByld(ResourceTable.ld_button) ;' What happe

Question 135

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What events can the next piece of code handle?

Question 136

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When a developer subscribes to a public event, he processes the public event in the onReceiveEvent() callback function and writes the following code. EventRunner runner = EventRunner.create(); MyE

Question 137

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How do I define the permissions correctly when a developer needs to customize the permissions for the Harmony OS third-party application?

Question 138

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In the Page Ability lifecycle of HarmonyOS, when the system creates a Page instance for the first time, which of the following callback methods will be triggered first?

Question 139

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If a developer wants to stop the service in a Service, which of the following APIs needs to be called?

Question 140

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When the Page of Harmony OS executes the onForeground() callback, which of the following states will the Page return to first?

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?

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?

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

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?

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

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.

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

Question 131

Before developing the NFC function, a HarmonyOS developer must first confirm whether the device supports the NFC function and whether the NFC is turned on.

NFC basic query

Access to the security element

card emulation

NFC message notification

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When a developer is developing a HarmonyOS application, if he needs to annotate information for a certain resource file of different types of elements in the Element directory to facilitate the understanding and use of the resource, which of the following methods can be added (XXX represents the comment text)?

'comment': 'xxX'

#XXX

/+X+/ or /XXX

xXxX

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Question 133

If a HarmonyOS developer has developed multiple applications and ensured that the data between different applications cannot be accessed through the triplet of account, application, and database, which of the following services can the developer use to achieve this function?

Distributed file services

Distributed data services

Data search services

Data storage management

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Question 134

When the developer jumps to a new page through the button button, the following code is created. If you don't add '' Button button = (Button) findComponentByld(ResourceTable.ld_button) ;' What happens to this line of code?

Public void onStart(Intent intent){

super.onStart(intent);

super.setUlContent

(ResourceTable.Layout_ability_main);

Button button =

(Button)findComponentByld(ResourceTable.ld_button);

button.setClickedListener(listener -> present(new

SecondAbilitySlice(),new Intent()));

}

When you click the button again, the ability crashes

button button does not show up on the layout

Clicking the button does not respond

Click the button button to jump to a new page

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Question 135

What events can the next piece of code handle?

public class CustonLomponent extends Componentimplements Component.DrawTask,Component.EstimateSizeListener,Component.TouchEventListener { ...... public CustomComponent (Context context){ ... Set up a TouchEvent to respond to events setlouchEventListener(this); } ... @Override public boolean onTouchEvent(Component component,TouchEvent touchEvent){ switch (touchEvent.getAction() { case TouchEvent.PRIMARY_POINT_DOWN: circ1ePaint.setColor(Color.GREEN); invalidate() ; break; case TouchEvent.PRIMARY_POINT_UP: circlePaint.setColor(Color.YELLOWV); invalidate(); break ; } return false; } } Both DOWN and UP events can be handled normally

Neither event can be processed

can only handle DOWN events

Only UP events can be processed

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Question 136

When a developer subscribes to a public event, he processes the public event in the onReceiveEvent() callback function and writes the following code.

EventRunner runner = EventRunner.create();

MyEventHandler myHandler = new

MyEventHandler(rurner);

@Override

public void onReceiveEvent(CommonEventData

commonEventData){

final AsyncCommonEventResult

result=goAsyncCommonEvent Runnable task = new

Runnable(){

@override

pub1ic void run {

......

The action to be performed, defined by the developer

result.finishCommonEvent();

}

};

myHandler.postTask(task);

}

Gives subscribers permissions

implements asynchronous operations, which solves the problem that time-consuming operations cannot be performed on onReceiveEvent

sets the priority of ordered public events

The publisher has the permission to publish sticky public events

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Question 137

How do I define the permissions correctly when a developer needs to customize the permissions for the Harmony OS third-party application?

'module': { 'reqPermissions': [ { 'name':'com.myability.permission.MYPERMISSION ' 'grantMode':'system_grant', 'availableScope': ['signatures'] } }

'module': { 'defPermissions': [ 'name':'com.myability.permission.INTERNET' 'grantMode':'user_grant' 'availableScope': ['signatures'] } }

'module': { 'defPermissions': [ { 'name':'com.myability.permission.INTERNET' 'grantMode':'system_grant' 'availableScope': ['signatures'] } }

'module': { 'defPermissions': [ { 'name':'com.myability.permission.MYPERMISSION', 'grantMode':'system_grant' 'availableScope': ['signatures'] } }

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Question 138

In the Page Ability lifecycle of HarmonyOS, when the system creates a Page instance for the first time, which of the following callback methods will be triggered first?

onStart()

onActive()

onInactive()

onStop()

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