A developer is using CommonEventData to encapsulate information about ordered public events for data processing when publishing, distributing, and receiving. What do I need to pay attention to when developing?

data is the result data of an ordered public event

intent is not allowed to be empty

code is the result code of an ordered public event

data is the result data of an ordered public event

intent is not allowed to be empty

code is the result code of an ordered public event

When a developer is developing a flight booking application, he needs to use the sliding selector DatePicker in the date selection of air tickets, and in order to improve the user experience, he needs to set the color of a single year/month/day item in operation to blue (#0000FF), which of the following items can meet the development needs?

ohos:selected text color=#0000FF

datePicker.setSelectedTextColor(new Color(Color.getlIntColor( '#0000FF')));

ohos:selected text color=#0000FF

datePicker.setSelectedTextColor(new Color(Color.getlIntColor( '#0000FF')));

datePicker.setPeratedTextColor(new Color(Color.getIntColor('#000OFF')));

ohos:operated_text_color='0000FF'

If a developer wants to develop an application on a smart screen, which of the following subsystems will he use?

Proprietary business subsystem of smart screen

. If a developer wants to use the distributed device virtualization capabilities of HarmonyOS, which of the following hardware can be selected by the developer?

Global Positioning System (GPS).

What are the reasons why a developer wants to use the previewer in DevEco Studio to view the application interface of the design, but the previewer cannot be used?

Preview is not supported for files currently open in the editor

SDK has not been updated to the latest version

The previewer resource was not downloaded

Project is not synchronized successfully

Preview is not supported for files currently open in the editor

SDK has not been updated to the latest version

The previewer resource was not downloaded

Project is not synchronized successfully

If a developer uses the startAbility() method provided in Ability to start a Service, what are the correct descriptions of starting the Service?

If the Service is running, the system will call back the onCommand() method of the Service to start the Service

If the Service is not yet running, the system will call onStart() to initialize the Service

If the Service is running, the system will call back the onStart() method of the Service to start the Service

If the Service is running, the system will call back the onCommand() method of the Service to start the Service

If the Service is not already running, the system will call the onCommand() method to start the Service

If the Service is not yet running, the system will call onStart() to initialize the Service

Which of the following methods can a developer use to obtain the actual pixel size corresponding to 8VP on the current device?

int size4 =AttrHelper.convertDimensionToPix(getContext(),'8vp'',0);

int size2 =AttrHe1per.vp2px(8,getContext());

int sizel =(int)(Dislaylanager.getInstance ().getDefaultDisplay( getContext().get().getRealAttributes().scalDensity*8 +.5f);

int size4 =AttrHelper.convertDimensionToPix(getContext(),'8vp'',0);

int size3=AttrHelper.convertDimensionToPix(getContext(),'8',0);

int size2 =AttrHe1per.vp2px(8,getContext());

int sizel =(int)(Dislaylanager.getInstance ().getDefaultDisplay( getContext().get().getRealAttributes().scalDensity*8 +.5f);

In order to solve the problem of safety risks when walking or cycling, a travel navigation company uses HarmoryOS to push mobile navigation reminders to its watch.

Distributed device virtualization

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

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

Distributed multi-terminal collaborative identity authentication

Build a trusted operating environment on distributed terminals

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

Distributed multi-terminal collaborative identity authentication

Build a trusted operating environment on distributed terminals

The distributed terminal must be a Huawei product

What features can developers use to implement collaborative identity authentication through HarmonyOS?

Collaborative Mutual Aid Certification

Multi-factor fusion authentication

Collaborative Mutual Aid Certification

Multi-factor fusion authentication

What are the features of Huawei DevEco Studio, which is a multi-device unified development environment?

Support distributed multi-terminal application development

Support rapid development of FA (Feature Ability) and PA (Partic1e Ability).

Support distributed multi-terminal application development

Support rapid development of FA (Feature Ability) and PA (Partic1e Ability).

What types of conversion functions are supported for static animations in HarmonyOS?

rotate: Rotates the specified angle of the specified assembly along the horizontal or vertical axis or center point

translate: Moves the specified component the required distance horizontally or vertically

scale: Scales the specified component down or in portrait orientation to the desired scale

rotate: Rotates the specified angle of the specified assembly along the horizontal or vertical axis or center point

animation-timing-function: Describes the speed curve of animation execution to make the animation smoother

translate: Moves the specified component the required distance horizontally or vertically

scale: Scales the specified component down or in portrait orientation to the desired scale

Relational databases provide the ability to add, delete, modify, and query local data.

For interfaces that update data, the return value indicates the number of rows affected by the update operation, and returns 0 if the update fails.

For interfaces that delete data, the return value indicates the number of deleted data rows, and if the deletion fails, it returns 0.

corresponds to the interface where data is inserted, and returns the line number of the latest inserted data when the insertion is successful, and 0 when it fails.

For interfaces that update data, the return value indicates the number of rows affected by the update operation, and returns 0 if the update fails.

For interfaces that delete data, the return value indicates the number of deleted data rows, and if the deletion fails, it returns 0.

For APIs that query data, you cannot run native SQL statements for query operations

When developing an application, a developer uses the WLAN P2P function to realize point-to-point data transmission between devices. Function 2, Create and remove groups, Function 3, Initiate a connection to the peer device.Which of the above functions is correct in the following descriptions?

To implement function 2, you need to use the createGroup() and removeGroup() interfaces, and you need to ohos.permission.GET_WIFI_INFO permissions

In order to achieve the above functions, you need to initialize the P2P messenger through the init(), interface, and need to request ohos.permssion.GET_WIFI_INFO and ohos.premission.SET_WIFI_INFO permissions.

To implement function 2, you need to use the createGroup() and removeGroup() interfaces, and you need to ohos.permission.GET_WIFI_INFO permissions

In order to achieve the above functions, you need to initialize the P2P messenger through the init(), interface, and need to request ohos.permssion.GET_WIFI_INFO and ohos.premission.SET_WIFI_INFO permissions.

In order to implement feature 3, connect() needs to be used, and ohos.permission.SET_WIFI_INFO permission needs to be requested

To implement function 1, you need to use the discoverDevices() interface, and you need to request the ohos.permission.SET WIFI INFO permission

Which of the following descriptions of traditional Bluetooth operation is correct for HarmonyOS devices?

Before you start Bluetooth scanning, you need to register for a broadcast BluetoothRemoteDevice.EVENT_DEVICE_DISOOVERED

can initiate a Bluetooth device scan through the startBtDiscovery() interface

If you want to get the scanned device, you must inherit the onReceiveEvent (CommonEventData data) method that implements the CommonEventSu business scriber class when you register the broadcast, and receive the EVENT_DEVICE_DISCOVERED broadcast

Before you start Bluetooth scanning, you need to register for a broadcast BluetoothRemoteDevice.EVENT_DEVICE_DISOOVERED

can initiate a Bluetooth device scan through the startBtDiscovery() interface

If you want to get the scanned device, you must inherit the onReceiveEvent (CommonEventData data) method that implements the CommonEventSu business scriber class when you register the broadcast, and receive the EVENT_DEVICE_DISCOVERED broadcast

You can use the getLocalName() interface to check whether Bluetooth is turned on

Which of the following can set the rounded corner effect of the ShapeElement?

AttrHelper.vp2px(8) element.setCornerRadiiArray(new float[] {radius,radius,radius,radius,radius,radius,radius,radius})

is set in Java code: element.setCornerRadius(AttrHelper.vp2px(8))

B in Java code set: int radius =

AttrHelper.vp2px(8) element.setCornerRadiiArray(new float[] {radius,radius,radius,radius,radius,radius,radius,radius})

is set in Java code: element.setCornerRadius(AttrHelper.vp2px(8))

An engineer wrote the following code, which items are correct in 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 composite index name

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

'name_index' is the composite index name

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

A developer wants to use the list component of the JavaScript UI framework to display a table.<list class='todo-wraper'scrollpage='true'scrollbar='on'shapemode='round'scrolleffect='no'><list-item for='{{todolist}}'class='todo-item'><text class='todo-title'>{{Sitem.title}}</text><text class='todo-title'>{{Sitem.date}}</text></list-item></list>

slides out of the viewport with the non-list part of the page at the top of the list

Swiping to the edge has no effect

slides out of the viewport with the non-list part of the page at the top of the list

Displayed when the inverted edge slider is touched, disappears after 2 seconds

Swiping to the edge has no effect

HarmonyOS supports on-demand elastic deployment of a variety of terminal devices.

supports the configuration of the feature set within the component

Support the on-demand selection of each component

supports the configuration of the feature set within the component

does not support the association of dependencies between components

Support the on-demand selection of each component

Clipping of functions within the component is not supported

When developing a HarmonyOS application, a developer receives the following product request: If a user logs in to the same HarmonyOS account on device A and device B, the user can log in to the app on device A and synchronize the application account authentication information to device B as needed. After the account authentication information is synchronized, the user can open the application on device B and log in directly without entering the application account authentication information again. Which of the following descriptions of this scene is correct?

The developer can use the UUID to do this, because the app can uniquely identify the same device with the UUID during its lifetime

If the developer uses the DVID to achieve the above functions, the DVID is strongly associated with the HarmonyOS account and application information, so it can prevent other applications from accessing the current application data

The developer can do this with the help of DVID, as the application can access and manage distributed devices based on the DVID

The developer can use the UUID to do this, because the app can uniquely identify the same device with the UUID during its lifetime

If the developer uses the UUID to achieve the above requirements, the UUID flag will still exist after the application is uninstalled

If the developer uses the DVID to achieve the above functions, the DVID is strongly associated with the HarmonyOS account and application information, so it can prevent other applications from accessing the current application data

A developer needs to use the emulator in DevEco Studio, click to log in to the emulator and enter your HUAWEI ID, and the browser will directly jump to the real-name authentication interface. What are the reasons for this problem?

has just completed real-name authentication, but the authentication has not yet taken effect

When testing the Bluetooth Low Energy feature of HarmonyOS, a developer needs to make the central device perform Bluetooth scanning. Which of the following descriptions of the developer's actions are correct?

Get scan filter, if the filter is empty, it is not used to scan without filter

Before performing Bluetooth scanning, it is necessary to inherit the advertiseCallback class to implement startResultEvent Callback, which is used to receive scan results

Call the BleCentralManager (BleCentralManagerCal1lback callback) API to obtain the device management object

Get scan filter, if the filter is empty, it is not used to scan without filter

calls startScan() to start scanning the Bluetooth device

Before performing Bluetooth scanning, it is necessary to inherit the advertiseCallback class to implement startResultEvent Callback, which is used to receive scan results

Call the BleCentralManager (BleCentralManagerCal1lback callback) API to obtain the device management object

Huawei H14-231_V1.0 Practice Test 12 - Free Online Exam Prep & Questions

When a developer uses HarmoyOS system security, which of the following functions makes the device have the ability to prove its security to other virtual devices?

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Huawei H14-231_V1.0 Practice Test 12

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