A developer called the getDefaultHost(Context context) interface of BluetoothHost to obtain a Bl1uetoothHost instance for managing local Bluetooth operations. The developer uses the following development steps to implement Bluetooth pairing:1Turn on Bluetooth.2Scan Bluetooth.3. Initiate pairing.Which of the following statements about steps 1, 2, and 3 is true?

calls startBtDiscovery() to complete step 2

calls the enableBt() interface to complete step 1

calls startPair() to complete step 3

calls startBtDiscovery() to complete step 2

The order in which steps 2 and 3 are implemented can be reversed

calls the enableBt() interface to complete step 1

calls startPair() to complete step 3

Which of the following descriptions is wrong when it comes to the simultaneous development of JS (JavaScript) and Java languages in HarmonyOS application development?

Use Java to develop the UI of the application

Use JS to develop the logic of the application

Java FA (Feature Ability) calls JS PA (Particle Ability).

Use Java to develop the UI of the application

Use JS to develop the logic of the application

Java FA (Feature Ability) calls JS PA (Particle Ability).

A PageA contains Ability SliceA1 and AbilitySliceA2, which is displayed as AbilitySliceA1 by default. What are the following steps if you want to navigate directly to PageA's AbilitySliceA2 in PageB on the current device?

Add a route for AbilitySliceA2 via addActionRoute() in PageA

Register the action corresponding to PageA in the configuration file

Set the action in the Intent of the PageB navigation

Add a route for AbilitySliceA2 via addActionRoute() in PageA

Register the action corresponding to PageA in the configuration file

Set the action in the Intent of the PageB navigation

Set Deviceld to empty in the Intent of the PageB navigation

Regarding Hongmeng's atomic service, the following statement is correct

Atomic service is displayed as a card in the Services Hub that can be added to the desktop

Atomic service is an installation-free application with an independent entrance

Atomic service is displayed as a card in the Services Hub that can be added to the desktop

When an atomic service is managed and distributed by the Marketplace, its size cannot exceed 10 MB

Atomic service is an installation-free application with an independent entrance

Atomic services correspond to one HAP package and are used to complete one specific convenience service

There is a configuration file named 'config.json' in the root directory of each HAP package of the HarmonyOS application, which mainly covers the following three aspects:

The configuration information of the app on a specific device

Global configuration information for the app

HAP package configuration information

The configuration information of the app on a specific device

Configuration information of all abilities in the current module

Global configuration information for the app

HAP package configuration information

When developing a HarmonyOS application, if you want to set the background color for a Text component in the page, the following is correct

ohos:background_element='$graphic:background

ohos:background_element='$color:green'

ohos:background_element='#0000FF'

ohos:background_element='#880000FF'

ohos:background_element='$graphic:background

ohos:background_element='$color:green'

ohos:background_element='#0000FF'

ohos:background_element='#880000FF'

. When developing a HarmonyOS application, use a component Text as the title of a page, if you want to make the title invisible and still occupy the space of the current page, the following operations are correct

text.setVisibility(Component.INVISIBLE)

text.setVisibility(Component.HIDE)

text.setVisibility(Component.INVISIBLE)

A developer has developed a HarmonyOS application that remotely launches a Page on phone B, and which of the following permissions does not need to request the user to grant permission by sending a pop-up window at runtime?

ohos.permission.GET_DISTRIBUTED_DEVICE_INFO

ohos.permission.DISTRIBUTED_DEVICE STATE_CHANGE

ohos.permission.GET_BUNDLE_INFO

ohos.permission.GET_DISTRIBUTED_DEVICE_INFO

ohos.permission.DISTRIBUTED_DEVICE STATE_CHANGE

ohos.permission.GET_BUNDLE_INFO

ohos.permission.DISTRIBUTED_DATASYNC

In the HarmonyOS distributed application scenario of multi-device collaboration, device A is often required to start and stop the service of device B, for example, start and stop the music playback of device B on device A. In the process of starting and stopping a Service, the following statement is correct

The onStart() method will only be called back once by the system during the lifetime of the Service

Every time you start the Service method, onCommand() will be called back by the system

can call the method terminateAbility() or stopAbility() to stop the Service

The onStart() method will only be called back once by the system during the lifetime of the Service

Every time you start the Service method, onCommand() will be called back by the system

can call the method terminateAbility() or stopAbility() to stop the Service

Service---Once it is running, it can be easily stopped or destroyed by the system

In the distributed terminal scenario, only by ensuring that the equipment used by the user is safe and reliable can the user's data be effectively protected on the virtual terminal and avoid the leakage of user privacy. What does HarmonyOS do to ensure that your devices are reliable?

Device certificate authentication

Collaborative Mutual Aid Certification

In the distributed terminal scenario, the 'correct person' refers to the data accessor and business operator who have passed identity authentication. The 'right person' is a prerequisite to ensure that user data is not illegally accessed and user privacy is not leaked. What does HarmonyOS use to implement collaborative authentication?

Multi-factor fusion authentication

Collaborative Mutual Aid Certification

Multi-factor fusion authentication

Collaborative Mutual Aid Certification

Which of the following is part of the basic software service subset in HarmonyOS?

Event Notification Service Subsystem

NetworkID is the communication identifier of distributed network device nodes in distributed networking, and is used to identify network device nodes in distributed services. To meet the privacy requirements in distributed scenarios, in which of the following scenarios will NetworkID change?

The user performs a factory reset of the device

The online list of devices in a distributed network changes from non-idle to empty and persists in empty for 5 minutes

The user performs a factory reset of the device

The online list of devices in a distributed network changes from non-idle to empty and persists in empty for 5 minutes

The interface of the application is transferred between different devices

Which of the following items belongs to the kernel layer in the system architecture of HarmonyOS?

HDF (Hardware Driver Foudation)

If a developer wants to use the clipboard service of HarmonyOS to implement simple data transfer between applications, which of the following statements is correct?

can paste the data copied in app A and paste it in app B

You can add or remove callbacks for changes in system clipboard data

can read, write, and query clipboard data from the system clipboard

can paste the data copied in app A and paste it in app B

You can add or remove callbacks for changes in system clipboard data

can read, write, and query clipboard data from the system clipboard

Clipboard data written to the clipboard service is destroyed at the end of the application

Apps that don't get focus in the foreground also have access to the system clipboard

Atomic service is a future-oriented service delivery method provided by HarmonyOS, which of the following statements about atomic service is correct?

Atomic service consists of one or more HAP packets, and one HAP packet corresponds to one FA or one PA

Atomic services do not have desktop icons, but they can be manually added to desktops in the form of service cards

Compared with the traditional way of installing applications, the E atomic service is lighter, and provides richer entry points and more accurate distribution

Atomic service consists of one or more HAP packets, and one HAP packet corresponds to one FA or one PA

Atomic services are managed and distributed by AppGallery

All HAP packages (including EntryHAP and FeatureHAP) of the Atomic Service are non-installation-free

Atomic services do not have desktop icons, but they can be manually added to desktops in the form of service cards

Compared with the traditional way of installing applications, the E atomic service is lighter, and provides richer entry points and more accurate distribution

If a developer wants to obtain the location information of a HarmonyOS device, which of the following methods is correct?

If the application scenario does not require real-time device location, you can obtain the latest historical location result cached by the system

When the real-time location result of the device is successfully determined by the system, it will be reported to the application through the onLocationReport interface. Applications can implement their own business logic in the implementation of the onLocationReport API

You can use the system's predefined constant SCENE_TRAJECTORY_TRACKING in a trajectory tracking scene

must apply for ohos.permission.LOCATION_INBACKGROUND permissions and be authorized by the user.

If the application scenario does not require real-time device location, you can obtain the latest historical location result cached by the system

When the real-time location result of the device is successfully determined by the system, it will be reported to the application through the onLocationReport interface. Applications can implement their own business logic in the implementation of the onLocationReport API

You can use the system's predefined constant SCENE_TRAJECTORY_TRACKING in a trajectory tracking scene

If a HarmonyOS engineer needs to apply for a digital certificate to complete the application release, what are the errors in the following descriptions of digital certificates?

contains the public key in the key pair

Digital certificates are used to ensure the integrity of the application

Which of the following items is correct about the objects of HarmonyOS permission protection?

Device identification, camera, microphone, etc. belong to device data

The objects protected by permissions can be divided into data and capabilities

Photos, contacts, calendars, locations, etc. are app data

Popping up a floating box and creating a shortcut belong to the device capabilities

Device identification, camera, microphone, etc. belong to device data

The objects protected by permissions can be divided into data and capabilities

A developer creates MyAbility with FooAbilitySlice and BarAbilitySlice, and currently FooAbilitySlice is in the foreground and gets focused, and then navigates to BarAbilitySlice, what happens to the lifecycle state in this period?

BarAbilitySlice changes from the INITIAL state to the INACTIVE state first

FooAbilitySlice changes from ACTIVE to INACTIVE

FooAbilitySlice changes from INACTIVE to BACKGROUIND

FooAbilitySlice changes from the INACTIVE state to the ACTIVE state

BarAbilitySlice changes from the INITIAL state to the INACTIVE state first

FooAbilitySlice changes from ACTIVE to INACTIVE

FooAbilitySlice changes from INACTIVE to BACKGROUIND

The streaming capability of HarmonyOS breaks the boundaries of devices and enables multi-device linkage, enabling users to separable, merge, and stream, enabling distributed services such as cross-device email editing, multi-device collaborative fitness, and multi-screen games. Which of the following options is one of the advantages of the HarmonyOS forwarding architecture?

Support remote service invocation and other capabilities, which can easily design business

Unified flow management UI, supporting device discovery, selection, and task management

Support different forms of devices, such as mobile phones, tablets, TVs, watches, etc

Support multiple applications to be forwarded at the same time

Support remote service invocation and other capabilities, which can easily design business

Unified flow management UI, supporting device discovery, selection, and task management

Support different forms of devices, such as mobile phones, tablets, TVs, watches, etc

Support multiple applications to be forwarded at the same time

When a HarmonyOS developer makes an FA call to PA, the callAbility interface returns the error 'Internal ability not register.', which of the following points needs to be checked correctly?

Check whether the bundleName and abilityName entered on the JS side are the same as those entered in the AcelnternalAbility inheritance class constructor

In the AceAbility inheritance class, the register method is executed for the AcelnternalAbility inheritance class

Check whether the Ability entered on the JS side is 1

Check whether the bundleName and abilityName entered on the JS side are the same as those entered in the AcelnternalAbility inheritance class constructor

In the AceAbility inheritance class, the register method is executed for the AcelnternalAbility inheritance class

Check whether the InternalAbility set on the JS side is 0

A HarmonyOS developer created two serial task distributors, dispatchera and dispatcher_b, and also created a proprietary task dispatcher. Which of the following scenarios can cause deadlocks due to improper use of syncDispatch?

On a dedicated thread, dispatchers are used for syncDispatch

In the tasks dispatched by dispatcher_a, the dispatcher_a is used again to dispatch the task

On a dedicated thread, dispatchers are used for syncDispatch

uses dispatcherb to dispatch tasks synchronously in dispatchera tasks

In the tasks dispatched by dispatcher_a, the dispatcher_a is used again to dispatch the task

When a developer designs a JavaScript login page, he needs to use Internal Ability to call Data Abiliity to verify the username and password, which of the following can be modified to complete the function?const ABILITY_TYPE_EXTERNAL=0;var action=0;action.bundleName='com.huawei.loginservice'; action.abilityName='com.huawei.loginservice.LoginDataAbility';action.messageCode=ACTION_MESSAGE_CODE_PLUS;action.data=actionData;action.abilityType=ABILITY_TYPE_EXTERNAL; action.syncOption=ACTION_SYNC;var result=awaitFeatureAbility.callAbility(action);

action.ability Type= ABILITY_TYPE_INTERNAL;

action.abiltyType =ABILITY_TYPE;

const ABILITY_TYPE_EXTERNAL= 2;

When a developer is developing a smart home application, the Switch component will be used to represent the switch of some devices, and ON should be displayed on the ON status component and OFF should be displayed on the closed state component, what are the following options that can meet the requirements?

Switch btnSwitch=(Switch)findComponentByld(Resource Table.ld_btn_switch); btnSwitch.setStateOffText('OFF'); btnSwitch.setStateONText('ON');

<Switch... ... ohos:text_state_off='OFF' ohos:text_state_on='ON'> </Switch>

Switch btnSwitch=(Switch)findComponentByld(Resource Table.ld_btn_switch); btnSwitch.setStateOffText('OFF'); btnSwitch.setStateONText('ON');

<Switch...... ohos:text_state_off='ON' ohos:text_state_on='OFF'> </Switch>

Switch btnSwitch=(Switch)findComponentByld(Resource Table.ld_btn_switch); btnSwitch.setStateOffText('ON'); btnSwitch.setStateONText('OFF');

<Switch... ... ohos:text_state_off='OFF' ohos:text_state_on='ON'> </Switch>

The developer is developing a ticket booking application, and uses the slide selector Picker to select the starting point of the ticket and writes the following code.<Pickerohos:id='$+id:test_picker'ohos:selected_text_color='#FFFFFF'ohos:value='55'ohos:max_value='10'ohos:selector_item_num='10'ohos:bottom_line_element='#FFFFFF'ohos:selected_text_size='16fp'/>

Set the font size of the selected Chinese version to 16fp

Choose the color of the Chinese text as white

Set the font size of the selected Chinese version to 16fp

Choose the color of the Chinese text as white

A developer uses ListContainer to create a list component that can be swiped, in order to improve the user experience, it needs to display the rebound effect when swiping to the beginning and end of the list, which of the following options can meet this requirement?

listContainer.setReboundEffect(true);

<ListContainer...... ohos:rebound_effect='true'/>

listContainer.setReboundEffect(true);

<ListContainer...... ohos:rebound_effect='true'/>

listContainer.setReboundEffect(false);

<ListContainer...... ohos:rebound_effect='false'/>

In the game scene, when playing games on the smart screen, you can use the mobile phone as a remote control handle, and with the help of the mobile phone's gravity sensor, acceleration sensor, and touch ability, it provides players with a more convenient and smooth gaming experience. What distributed capabilities are used to use the mobile phone as a remote control controller in this scenario?

Distributed Device Virtualization

When a developer sets a background for a Text component, which of the following methods are correct?

ohos:background_element='$graphic:background

ohos:background_element='#000000'

ohos:background_element='$color:black'

ohos:basement='$graphic:graphic_src'

ohos:background_element='$graphic:background

ohos:background_element='#000000'

ohos:background_element='$color:black'

Which of the following prerequisites are required for developers to access the process of another device or call the methods of another device on one device to achieve multi-device collaboration?

The project contains at least 2 or more modules

Connect to the same WiFi network

You need to select a real device and have been connected to the PC normally

The project contains at least 2 or more modules

Connect to the same WiFi network

You need to select a real device and have been connected to the PC normally

Huawei H14-231_V1.0 Practice Test 10 - Free Online Exam Prep & Questions

If a developer uses custom components when developing a HarmonyOS application, what are the correct descriptions of custom components below?

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