An engineer wrote the following code, which items are correct about the description of the following code?@Entity(tableName = 'user', ignoredColumns = {'ignoredColumn1', 'ignoredColumn2'} , indices = {@Index(value = {'firstName', 'lastName'), name ='name_index', unique = true)})

name_index is the compound index name

ignoredColumns indicates that the field does not need to be added to the properties of the user table

name_index is the compound index name

ignoredColumns indicates that the field does not need to be added to the properties of the user table

Which of the following subsystems in the HarmonyOS subsystem belongs to the hardware service subsystem set?

Event Notification Service Subsystem

A software development engineer uses the traditional Bluetooth native management method to manage Bluetooth, which of the following functions can the engineer achieve?

Get a list of Bluetooth devices that have been paired with Bluetooth for the machine

Scan the surrounding Bluetooth settings

Get a list of Bluetooth devices that have been paired with Bluetooth for the machine

Scan the surrounding Bluetooth settings

Which of the following scenarios is part of the HarmonyOS notification function?

Displays received text messages

A HarmonyOS developer uses the EventHandler mechanism to process four events: A, B, C, and D, where event D retains the default priority, and the priority properties of the other three events are set as follows: Event A: Priority.INTERMEDIATE Event B: Priority.HIGH Event C: Priority.IDLEWhich of the following statements about the above events are correct?

Event A will be delivered immediately

delivers event C when there are no other events

Event D will be delivered before Event C

Event A will be delivered immediately

Event B D will be delivered before Event B

delivers event C when there are no other events

Event D will be delivered before Event C

In a live broadcast scenario, where the anchor uses an action camera as the live broadcast camera, what are the distributed capabilities of HarmonyOS used in this scenario?

Virtualization of distributed devices

The library file is the third-party code that the application depends, which are the correct ways to use the following library files?

Put the library files in the libs directory in the form of jar, so, etc., and then reference the dependencies {Implementation project(:mylibrary)} through the build.gradle under the project If the required library files exist in the maven repository, you can configure the project's build.gradle as follows to use Repositories {.}

Maven{ Url 'XXX' // Add a Maven repository address, which can be a local Maven address or a remote Maven address }

Put the library file in the libs directory in the form of jar.so, and then refer to the dependencies (Implementationproject(: mylibrary)) through the build.gradle of the application module.

Create a new module with the source code of the library file as a whole, and the entry directly references the classes in the library file

Put the library files in the libs directory in the form of jar, so, etc., and then reference the dependencies {Implementation project(:mylibrary)} through the build.gradle under the project If the required library files exist in the maven repository, you can configure the project's build.gradle as follows to use Repositories {.}

Maven{ Url 'XXX' // Add a Maven repository address, which can be a local Maven address or a remote Maven address }

Put the library file in the libs directory in the form of jar.so, and then refer to the dependencies (Implementationproject(: mylibrary)) through the build.gradle of the application module.

In HarmonyOS, there are some applications that can call out universal cards, which can bring you the experience of using ().

Swipe up icon, information directly

Add desktops and combine them freely

Swipe up icon, information directly

Add desktops and combine them freely

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 btnSwitch= (Switch)findComponentByld(ResourceTable.ld_btn_switch); btnSwitch.setStateOffText(ON); btnSwitch.setStateONText(OFF);

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

Ability and InternalAbility are two different ways to call PA (ParticleAbility) by FA (FeatureAbility).

Ability has an independent life cycle

The class inherited by B Ability is ohos.aafwk.ability.Ability

Ability does not need to be registered with the FA

Ability has an independent life cycle

The class inherited by B Ability is ohos.aafwk.ability.Ability

Ability does not need to be registered with the FA

internalAbility can be called by other FAs

Which of the following items are involved in migrating Page from device A to device B?

requests migration from the Page on Device A

The system calls back the onCompleteContinuation( ) method of all AbilitySlice instances on the Page on Device A and all AbilitySlice instances in its AbilitySlice stack

The system calls back the onStartContinuation( ) method of all AbilitySlice instances on the Page on device A and all AbilitySlice instances in its AbilitySlice stack

requests migration from the Page on Device A

The system calls back the onCompleteContinuation( ) method of all AbilitySlice instances on the Page on Device A and all AbilitySlice instances in its AbilitySlice stack

If the migration can be done immediately, the system calls back the onSaveData( ) method of all AbilitySlice instances on the Page on device B and all AbilitySlice instances in its AbilitySlice stack

Which of the following descriptions of Harmony OS Data Ability are correct?

Data Ability can be used for data sharing between apps on the same device and across devices

Using Data Ability helps apps manage access to data stored by themselves and other apps, and provides a way to share data with other apps

Data Ability is used to provide a unified abstraction of data access within and between applications

Data Ability provides interfaces for adding, deleting, modifying, querying, and opening files of data, and the specific implementation of these interfaces is provided by the system

Data Ability can be used for data sharing between apps on the same device and across devices

Using Data Ability helps apps manage access to data stored by themselves and other apps, and provides a way to share data with other apps

What files does an engineer need to use to sign the debugged module when he wants to debug a newly developed application on a real device?

HarmsryAppProxvision file (.p7b).

When a data engineer constructs a data table, which of the following can be used as data types?

Double-precision floating-point type

Which of the following features of the HarmonyOS distributed database are correctly described?

shields different physical transmission channels

The synchronization logic is completely transparent

The interface is simple, and the backup and encryption features are simple and configurable

shields different physical transmission channels

The synchronization logic is completely transparent

The interface is simple, and the backup and encryption features are simple and configurable

Which of the following subsystems in HarmonyOS is part of the basic software service subsystem set?

Event Notification Service Subsystem

When using HarmonyOS distributed terminals, which of the following items can ensure that the system is safe and reliable?

Distributed multi-terminal collaborative identity authentication

In the process of cross-terminal flow of distributed data, the data is classified and hierarchically managed

Build a trusted operating environment on distributed terminals

Distributed multi-terminal collaborative identity authentication

The distributed terminal must be a Huawei product

In the process of cross-terminal flow of distributed data, the data is classified and hierarchically managed

Build a trusted operating environment on distributed terminals

The library file is the third-party code that the application depends on, which of the following library files are correct?

Put the library files in the libs directory in the form of jar, so, etc., and then reference the dependencies dependencies{Implementation project(':mylibrary ') } through the build.gradle under the project

If the required library files exist in the maven repository, you can use repositories{Maven{Url 'XXX'// to add the project's build.gradle as follows The address of the Maven repository, which can be either a local Maven address or a remote Maven address}

Put the library file in the libs directory in the form of jar.so, and then reference the dependency library through the build.gradle of the application module dependencies(Implementation project(':mylibrary'))

Create a new module with the source code of the library file as a whole, and the entry directly references the classes in the library file

Put the library files in the libs directory in the form of jar, so, etc., and then reference the dependencies dependencies{Implementation project(':mylibrary ') } through the build.gradle under the project

If the required library files exist in the maven repository, you can use repositories{Maven{Url 'XXX'// to add the project's build.gradle as follows The address of the Maven repository, which can be either a local Maven address or a remote Maven address}

Put the library file in the libs directory in the form of jar.so, and then reference the dependency library through the build.gradle of the application module dependencies(Implementation project(':mylibrary'))

When a developer calls Particle Ability (PA) with FA (Feature Ability), callAbility returns the error 'Internal ability not register.', what key steps does the developer need to check?

In the AccAbility inheritance class, whether the register method is executed for the AcelnternalAbility inheritance class

Whether the bundLeName and abilityName filled in on the JS (JavaScript) side are the same as the names filled in the AcelnternalAbility inheritance class constructor

checks that the Ability filled in on the JS (JavaScript) side is 1

In the AccAbility inheritance class, whether the register method is executed for the AcelnternalAbility inheritance class

Whether the bundLeName and abilityName filled in on the JS (JavaScript) side are the same as the names filled in the AcelnternalAbility inheritance class constructor

Check that the Internal Ability entered on the JS (JavaScript) side is 0

A HarmamyOS developer created three task distributors, serial task dispatcher_a and dispatcher_b, and a proprietary task dispatcher dispatcher_s. The developer is experiencing a deadlock while using syncDispatch, which of the following causes could cause this phenomenon?

In the task assigned by the dispatcher_a, the task is dispatched by dispatcher_a again

On a dedicated thread bound dispatcher_s, use dispatcher_s for syncDispatch

In the task assigned by the dispatcher_a, the task is dispatched by dispatcher_a again

In dispatcher_a assignment tasks, use dispatcher_b to dispatch assignments

On a dedicated thread bound dispatcher_s, use dispatcher_s for syncDispatch

To test the HarmonyOS Bluetooth Low Energy function, a developer uses a central device to call the startScan() interface and scans for a peripheral device. In order for the central device to complete the data exchange with the peripherals, the developer implemented the following development steps.

After the central device obtains the peripherals, it calls connect (boolean isAUtoConnect, BlePeripheraCallback callback) to establish a GATT connection with the peripherals

After the C GATT connection is successful, the central device can call the discoverServices() interface to obtain various data supported by the peripheral equipment

GATT connection is successful, and the peripheral device can call the write method to write the eigenvalue data to the central device

After the central device obtains the peripherals, it calls connect (boolean isAUtoConnect, BlePeripheraCallback callback) to establish a GATT connection with the peripherals

After the C GATT connection is successful, the central device can call the discoverServices() interface to obtain various data supported by the peripheral equipment

After the GATT connection is started, the developer needs to determine whether the GATT connection is successful based on the serviceDiscoveredEvent(int status) callback result

A HarmonyOS developer uses the EventHandler mechanism to handle four events: A, B, C, and D, where event D retains the default priority, and the priority properties of the other three events are set as follows:Event A: Priority.IMMEDIATEEvent B: Priority.HIGHEvent C: Priority.IDLEWhich of the following accounts of the above events is correct?

Event A will be delivered immediately

delivers event C when there are no other events

Event D will be delivered before Event C

Event A will be delivered immediately

Event B D will be delivered before Event B

delivers event C when there are no other events

Event D will be delivered before Event C

In order to control the access of a specific interface to the caller, an application confirms that the visitor has the required permissions through verifyCallingPermission. Which of the following descriptions is correct?

If the caller does not have permission, the service will not be provided

If the caller's permission verification is passed, the service will be provided

If verifyCallingPermission returns a value of 0, the service is not provided

If the caller does not have permission, the service will not be provided

If verifyCallingPermission returns a value of -1. then the service will be provided

If the caller's permission verification is passed, the service will be provided

Which of the following options belong to the kernel layer in the HarmonyOS system architecture?

HDF (Hardware Driver Foundation)

When using HarmonyOS in distributed terminal scenarios, which of the following capabilities can be used to ensure that the device is safe and reliable?

Device Certificate Certification

When a user is on a video call,Want to migrate the mobile phone video to the smart screen for playback,When clicking Migrate,Find that the smart screen is already in the optional list,What are the items in the description of the scene?

embodies the self-discovery function of the distributed soft bus

The mobile phone and the smart screen need to be under the same LAN

embodies the characteristics of extremely fast transmission of distributed soft bus

The mobile phone and the smart screen can be different HUAWEI ID

embodies the self-discovery function of the distributed soft bus

The mobile phone and the smart screen need to be under the same LAN

embodies the characteristics of extremely fast transmission of distributed soft bus

Huawei H14-231_V1.0 Practice Test 9 - Free Online Exam Prep & Questions

What files does an engineer need to use when he wants to debug a newly developed application on a real device?

HarmonyOS AppProvision

Private key

Request file

Digital certificates

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