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Which of the following accounts does the authentication service support?

A.

WeChat

B.

QQ

C.

HUAWEI ID

D.

Alipay

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?

A.

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

B.

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

C.

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

D.

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

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

A.

LiteOS

B.

HDF (Hardware Driver Foundation)

C.

Linux

D.

KAL(Kerne1 Abstract Layer)

When creating an application, which field in the app.json5 or config.json file must be the same as the application package name?

A.

package

B.

name

C.

bundleName

D.

page

Which of the following is all the components of the HAP package in HarmonyOS?

A.

Logical code, resource files, third-party libraries, application configuration files, pack.info

B.

Logical code, resource files, third-party libraries, and application configuration files

C.

Logical code, resource files, application configuration files

D.

Logical code

A developer uses the HarmonyOS Bluetooth Low Energy function to achieve cross-distance wireless communication, how does the central device and peripheral devices interact in this scenario?

A.

After the peripheral device and the central device establish a GATT connection, the peripheral device can query various data supported by the central device

B.

The peripheral device acts as a server and can receive GATT connection requests from the central device

C.

Peripherals are responsible for sending broadcasts

D.

The central device scans peripherals and discovers broadcasts

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?

A.

Event Awill be delivered immediately

B.

EventB D will be delivered before Event B

C.

delivers event C when there are no other events

D.

EventD will be delivered before Event C

What are the following task distribution methods for developers?

A.

Synchronous distribution

B.

Asynchronous distribution

C.

Asynchronous delayed distribution

D.

Distributed in groups

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?

A.

HarmsryAppProxvision file (.p7b).

B.

Digital certificate (.cer).

C.

Private key (.p12)

D.

Request file (.csr).

Which of the following combinations cannot realize two-way data synchronization between child components and parent and child components?

A.

@State and @Link

B.

@Provide and @Consume

C.

@Observed and @ObjectLink

D.

@State and @Prop

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

A.

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

B.

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 useRepositories {.}

C.

Maven{

Url 'XXX'

// Add a Mavenrepository address, which can be a local Maven address or a remote Maven address

}

D.

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.

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

A.

ohos:basement="$graphic:graphic_src"

B.

ohos:background_element="$graphic:background

C.

ohos:background_element="#000000"

D.

ohos:background_element="$color:black"

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.

A.

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

B.

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

C.

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

D.

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

What kind of permissions do you need to use Image to load network images?

A.

ohos.permission.USE_BLUETOOTH

B.

ohos.permission.INTERNET

C.

ohos.permission.REQUIRE_FORM

D.

ohos.permission.LOCATION

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 theoptional list,What are the correct descriptions of the scene?

A.

It embodies the characteristics of extremely fast transmission of distributed soft bus

B.

requires the mobile phone and the smart screen to be under the same LAN

C.

embodies the self-discovery function of the distributed soft bus

D.

mobile phones and smart screens can make different Huawei accounts