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When developing a HarmonyOS application, if you want to set the background color for a Text component in the page, the following is correct
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)})
Which of the following permissions is required when using the Video component to play network videos?
Which of the following items belongs to the kernel layer in the system architecture of HarmonyOS?
If a developer wants to use the notification function of HarmonyOS when developing an application, which of the following notification styles can be selected by the developer?
After the release of the open beta version, how do the invited test users experience?
When a programmer develops an online education application, the studentAnswer:ing interface has multiple choice questions and multiple choice questions, which of the following components is suitable for displaying multiple choice questions?
Which of the following situations will not call back the onFinish function?
Regarding the callback event of the Video component, the following statement is incorrect
HarmonyOS is designed for 1+8+N full-scene experience, which of the following devices belongs to the "8" in 1+8+N?
An engineer uses a local simulator for application debugging, which of the following describes the wrong local simulator?
Which of the following combinations can realize the one-way state synchronization of child components from parent and child components?
HarmonyOSdefines different open scopes and authorization methods to protect data according to the sensitivity of the data involved in the interface
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?
When developing a HarmonyOS application, which of the following notification types can be implemented by developers?
Which of the following breakpoint management functions does the JS code type support?
Where is the data of the preference placed after persistence?
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:
When a developer clicks the exit button of an application to release Page Ability resources, which callback method in the Page Ability lifecycle will be triggered?
In HarmonyOS, Intents are the carriers for transferring information between objects, and which of the following items can be set through Intents?
In DevEco Studio, what form can developers use to develop HarmonyOS cloud?
When a company is developing a HarmonyOSapplication, it needs to customize an artboard control, how to get the X coordinates of the current touch point in the whole screen during the listening of touch events?
The maximum number of simultaneous activations of a Worker thread
Regarding the Button component, which of the following styles is a capsule-type button?
What are the following types of transition animations in the declarative development paradigm?
API9 and above, router.pushUrl() method, what is the default mode used by the jump page?
Which of the following items are correctly described about the HarmonyOS distributed database?
Which of the following scenarios is part of the HarmonyOS notification function?
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?
The maximum length limit of the preference key is ( ) bytes
HarmonyOS Capabilities are divided into two types: Feature Ability and Particle Ability.
What are the following aspects of resource utilization analysis that DevEco Studio Performance Analyzer can perform?
A developer needs to use the current scattered data network for socket data transmission, and in this scenario, the development process involves the following steps:
1. Use socket to send data
2. Call NetHandle.bindSocket() to bind the network.
3. Call NetManager.getDefaultNet() to get the default data network.
4. Call NetManager.getInstance(Context) to get the instance object of network management.
When the developer combed through the development steps, the above steps were sorted according to the order in which the features were completed in the code. Which of the following is the correct order?
Which field needs to be configured in the module.json5 file for UIAbility startup mode?
How to set reverse playback in attribute animation?
Which of the following subsystems in HarmonyOS is part of the basic software servicesubsystem set?
What principles of permission should be followed when developing HarmonyOS applications?
When designing the application, the developer added a Text component and a Button component, and the development sample is shown below. What layout does the developer not have to choose to place the components?
When creating an application, which field in the config.json file must be the same as the application package name?
When adding user information, if the account uses a mobile phone number, which of the following input formats is correct?
Which of the following resource directories should the pictures, audios, videos and other media files involved in the application development process be placed in?
When developing an application, a developer uses the WLANP2P function to realize point-to-point data transmission between devices. The functionality of the application is as follows: Function 1: Discover the peer device. Function 2: Create and remove groups. Function 3: Initiate a connection to the peer device. Which of the above features is correct in the following descriptions?
When a developer receives a new product demand and asks the user to remake old documents such as paper letters into electronic versions, the application can improve the remake effect of old documents and make the work more correct. What kind of AI-enabled capabilities can be leveraged by HarmonyOSto achieve this?
Regarding the container components Row and Column, the following statement is wrong.Themain axis of A Column container is vertical, and the cross axis is horizontal;
The meta-service package consists of one or more HAP packages, and each HAP package shall not exceed ( ) to provide a second-to-open experience.
What is the minimum API version supported by HarmonyOS Cloud Development?
A HarmonyOS application developer creates two pages, indlex and detai1, so that the two pages jump to each other. The code of the index page is as follows, which of the following descriptions are correct?
Cross-terminal migration and collaboration are the capabilities of which HarmonyOS feature
If a developer wants to obtain the location information of a HarmonyOS device, which of the following methods is correct?
HarmonyOS supports the flexible deployment of multiple terminal devices on demand through design methods such as componentization and miniaturization, and can adapt to different types of hardware resources and functional requirements. Which of the following descriptions of elastic deployment are correct?
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?
In HramonyOS, which of the following can developers use the static animation feature to achieve?
In HarmonyOS's "1+8+N" strategy, mobile phones belong to one of the "8" devices.
Sampling refers to the process of sampling a digital signal in a continuous time domain at certain time intervals to obtain a discrete signal in the discrete time domain.
The input division method of HarmonyOS is different from that of traditional operating systems, and multi-dimensional inputs will be integrated, so that developers can use application frameworks, UI components or interfaces that come with the system to implement applications with multi-dimensional and natural interaction characteristics.
When a developer develops an application based on HarmonyOS, the data used by a developer can be decomposed into multiple objects. The developer needs to add, delete, modify, and check the teaching data, but does not want to write overly complex SQL statements. In this scenario, the developer can use an object-relational mapping database to process the data.
Huawei's latest mobile phones、HarmonyOS system is pre-installed in the smart screen.Among them, the mobile phone does not belong to the HarmonyOS large system device.The smart screen belongs to the large system device。
When using the location capability of HarmonyOS, developers need to apply for the LOCATION permission, which is a non-sensitive permission and needs to be declared in config.json.
A Page Ability (hereinafter referred to as a "Page") may consist of one or more AbilitySlice, which refers to the sum of a single page of an application and its controllogic.
When an Intent is used to initiate a request, if both BundleName and Abilitylame are specified, the application can be started directly according to the full name of the Ability (for example, "com.demcapp.FooAbility").
When using EventHandler to implement inter-thread communication, if EventRunner takes out the Runnable task, it will trigger the callback method of EventHandler and the processing method of EventHandler.
HarmonyOS developers can use the "chos. Permission.CET_NET7ORK_INFO request permission to Modify Network Connection Status.
Intent is a carrier for transmitting information between objects.
HarmonyOS not only has the system capability of a single device, but also supports deployment on multiple devices with different memory sizes based on the same set of system capabilities
When a developer starts a music player on a remote device, he or she may not fill in the Deviceld of the remote device.
When installing the HarmonyOS application development environment, if the network can directly access the Internet, developers need to set up Gradle and NPM agents to configure the development environment correctly.
When a developer navigates within the same page, the AbilitySlice is new, even if present(newTargetSlice(), new Intent()) is repeatedly called, it will not cause any AbilitySlice to be out of the stack.
HAR (HarmonyOS Ability Resources) is different from HAP (HarmonyOS Ability Package) in that HAR cannot be installed and run on devices independently, and can only be referenced as dependencies of application modules.
The network management module of HarmonyOS can realize the communication between different processes of the machine, and the communication supports streaming socket technology.
The lightweight preference database is a non-relational database, which mainly provides lightweight key-value operations and supports local applications to store a large amount of data. If a HarmonyOS developer uses a lightweight preference database to save data, the data will be stored in a local file and will not be loaded into memory.
In multiple distributed devices with the same HarmonyOS account, after logging in to an app, the app can synchronize the app account authentication information (account name, token or other) to other devices as needed.
When designing a JavaScript UI based on HarmonyOS, if the text component itself cannot be focused, the focus cannot be moved to the component, and the focusableattribute of text is set to true. text component.
In JavaScript UI development, for wearable projects and TV projects, the name of the home page can be not index, and the first page in the pages configuration list is the home page; for the litewearable project, the name of the home page must be index.
If a developer wants to develop a file background download function, there needs to be a Page Ability to provide U pages, and a Service Ability to provide the background file download function. If you want to perform some operations after connecting to the Service Ability in the Page Ability, you need to implement the onAbilityConnectDone() method in the Page Ability.
Developers can create user interfaces directly on AbilitySlice or on Ability.
HarmonyOS application packages are released in the form of application packs, which are composed of one or more HAPs (HarmonyOS Ability Packages) and pack.info describing each HAP attribute.
When developing HarmonyOS applications, if the client and server need to communicate across processes, you can use idl to define programming interfaces that are recognized by both.
In the process of developing an application based on HarmonyOS, in order to avoid applying for permissions that are unrelated to the user's required functions, a developer uses the UUID generated by the application instead of the device ID to reduce the permission application. The developer's actions exemplify the principle of applying for permissions in the vicinity.
HarmonyOS provides the Al capability of Instant Messaging (IM) intent, which can convert speech signals into text or commands, and identify the user's intent represented by the message content.
The way to find the object of the control declared in the Layout file by ID in HarmonyOS is findComponentByld().
The atomic service consists of one or more HAP packets, andone HAP packet corresponds to one FA or one PA. Each FA or PA can be operated independently to perform 1 specific function.
Lightweight data storage is suitable for data storage involving a large number of data relationships and business relationships, and has better read and write performance than relational databases and object-relational mapping databases.
In HarmonyOS's "1+8+N" strategy, smart microwave oven devices belong to "N" devices.
Sampling refers to the process of sampling a digital signal in a continuous time domain at certain time intervals to obtain a discrete signal in the discrete time domain.
If a developer wants to be able to get the return result when the user returns from the navigation target AbilitySlice, they should use presentForResult() to implement the navigation. When the user returns from the navigation target AbilitySlice, the system will call onResult() to receive and process the returned result.
A HarmonyOS application may not contain a hap package of the feature type.
In HarmonyOS, both relational databases and object-relational mapping databases can use SQL statements to manipulate databases.
Motion sensors may be a single physical sensor, or they may be composed of multiple physical sensors.
AR (HarmonyOSAbilityResources) Different HAPs (HarmonyOSAbilityPackage), HAR cannot be installed and run on the device independently, and can only be referenced as a dependency of the application module.
There is a button on the main interface of a HarmonyOS application, and the display text on the button is "Start Download", after clicking this button, a sub-thread is created to perform time-consuming download operations. After the download is over, you can change the button in the subthread to "Download End".
A developer uses continueAbility() to migrate the distributed news application of the mobile phone to the large screen, and the large screen can also migrate the news browsing page back to the mobile phone.
The following code snippet is used to start the Service of the remote device, if it is replaced with the Service.withDeviceld("deviceld") that starts the local device, it can be deleted.
Intent intent =new Intent();
Operation operation =new Intent.OperationBuilderO
.withDeviceld("deviceld")
.withBundleName
("com.domainname.hiworld.himusic")
.withAbilityName("com.domainname.hiworld.himusic.ServiceAbility")
.withFlags(Intent.FLAG_ABILITYSLICE_MULTI_DEVICE)
.bui1d();
intent.setOperation(operation);
startAbility(intent);
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.
Frame rate is the frequency (rate) at which a bitmap image appears continuously on a display in frames, measured in hertz (Hz).
In the Javascript UI framework, to realize the jump between pages, you need to specify the uri in the page routing router to find the target page.
A developer calls the terminate method in JavaScript code, which causes the Page Ability to be destroyed.
A user uses the HarmonyOS distributed task scheduling capability to migrate mobile phone videos to the smart screen for playback. In this scenario, the process of finding whether the smart screen has the same playback software is a global query.
Operations such as the display and update of the UI interface are carried out on the main thread, so the main thread is also called the UI thread.
When an application calls a service, the service will check the permissions of the application, and the service cannot be used if there is no corresponding permission.
A HarmonyOS developer uses syncDispatch to synchronously dispatch tasks when developing applications. In this scenario, syncDispatch dispatches the task and waits for the task to complete on the current thread, so the current thread is not blocked until it returns.
HarmonyOS provides the NFC message notification function, through which developers can obtain the message of the NFC switch state change and the NFC field strength message.
Distributed data services can isolate data belonging to different applications to ensure that data between different applications cannot be accessed to each other through distributed data services.
A user grants permission X to application A of a certain device, and on the device, application A persists the state of this permission grant and can call all interfaces controlled by permission X at any time.
In the lifecycle of AbilitySlice, the onStart() callback method does not need to be rewritten.
The description of the ForEach(arr,itemGenerator,index) component is correct
What are the scenario-based capabilities included in the HarmonyOS feature?
The log content filtered by a developer through relevant information is:
01-2016:08:36.908
23597/com.example.myapplication W
00201/MY TAG:Failed to visit,reason:503.
Which of the following cannot be obtained by analyzing the log?
A manufacturer uses the HarmonyOS system to produce a smart oven, which is a lightweight system device in HarmonyOS.
HarmonyOS supports on-demand elastic deployment of a variety of terminal devices.
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?
When developing HarmonyOS applications, if the client and server need to communicate across processes, you can use idl to define programming interfaces that are recognized by both.
Relational databases provide the ability to add, delete, modify, and query local data.
What are the parameters of animation in attribute animation?
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?
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?
What are the common problems in uploading software packages during the listing process of HarmonyOS applications/metaservices?
What types of conversion functions are supported for static animations in HarmonyOS?
Which of the following components are container components?
If there are different components in the layout with the same ID, when the component is searched by ID, the last component found will be returned.
A developer needs to read the resource file in the rawfile folder, and the following code can be used to read it successfully.
Image
image(Image)findComponentByld(ResourceTable.Id_component_image);
Image.setPixelMap (ResourceTable.Media hawei);
A user migrated video from his mobile phone to a smart screen for playback, using the distributed task scheduling capability of HarmonyOS. In this scenario, the process of connecting the mobile phone to the playback software of the smart screen belongs to the remote connection.
What are the following scenarios that belong to the public events of the system?
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?
If you need to use a composite animation, you can combine multiple animated objects and add them to the AnimatorGroup. The AnimatorGroup provides two methods: runSerially() and runParallel(). Indicates that the animation starts at the same time and that the animation starts sequentially.
HarmonyOS Distributed File Service can automatically share files under different accounts.
There is an application A that occupies a large amount of memory and a background service B on the mobile phone, but there is no binding relationship between the two. What are the following scenarios that may cause Service B to be stopped?
When a developer is developing an application, he uses DevEco Studio to create an empty Java project, but does not install Node.js separately, and can still develop the project normally.
What is the correct position setting for the Tabs tab described below?
In the JavaScript FA development self-record, the file ending hml is used to describe the current page layout structure, the components used in the page, and the hierarchical relationship between these components, and the following code should be placed in the file.
In HarmonyOS, when a subscription action is performed after an out-of-order public event is published, subscribers can also receive the out-of-order public event.
If an engineer uses the two-way preview function of JavaScript in DevEco Studio, which of the following items can be supported after the function is enabled?
Which of the following descriptions of traditional Bluetooth operation is correct for HarmonyOS devices?
Which of the following component hierarchies are correct
Barrier-free color palettes should meet the identification needs of color blindness, and safe color palettes can be found by simulating the visual effects of different similar color defects.
What are the life cycle states of UIAbility?
If a developer uses the startAbility() method provided in Ability to start a Service, what are the correct descriptions of starting the Service?
Mobile terminal devices have penetrated into all aspects of people's daily life, such as checking the weather, news and anecdotes of the city, traveling taxi, travel navigation, and sports records. These accustomed activities are inseparable from locating the location of the user's terminal equipment. What positioning technologies does HarmonyOS's location services subsystem provide?
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?
To publish a public event with permissions in HarmonyOS, you need to set subscriber permissions in the code.
Which of the following pop-up functions does ArkU provide?
What attributes are supported by attribute animations?
What is the correct description of the http module?
If a developer needs to use the JavaScript UI framework to display the bar chart of the month's product sales, he can use the chart component to implement this function.
In HarmonyOS, when switching between pages, if you use Ability Switching, it is equivalent to constantly switching new pages in the same window, and if you use AbilitySlice to switch, a new window will pop up.
If a developer uses the DevEco Studio tool for application development, which of the following commissioning methods does the tool support?
To publish an app, a HarmonyOS developer needs to use a certificate request file (Cerificate Signing Request) to apply for a digital certificate from AppGallery Connect.
The HarmonyOS Media Management module provides capabilities for audio playback, audio recording, audio and video synthesis, and video decoding.
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?
In order to put a series of related download tasks into a task group, a developer uses the following code:
String dispatcherName =
"parallelTaskDispatcher";
TaskDispatcher dispatcher =
createParallelTaskDispatcher(dispatcherName,TaskPriority.DEFAULT);
Group group
=dispatcher.createDispatchGroup();
dispatcher.asyncGroupDispatch(group,new
Runnable(){
@Override
public void run(){
HiLog.info(LABEL_LOG,"download taskl is
running ");
}
});
dispatcher.groupDispatchlotify(group,new
Runnable(){
@0verride
public void run(){
HiLog.info(LABEL_L0G,"the close task2 is
running");
}
});
dispatcher.groupDispatchlotify(group,new
Runnable(){
@Override
public void run(){
HiLog.info(LABEL_L0G, "the close task is
running after all tasks in the group are
completed");
}
});
If the developer runs this code, which of the following results might occur?
When a developer compiles a project, the compilation fails, and the message "This device type does not match project profile" is displayed, because the device type configured in "config.json" does not match the device type for debugging, and "deviceType" needs to be configured in the "module" tag.
What are the following types of task dispensers that HarmonyOS provides for developers?
What are the types of background agent reminder services?
Which of the following are the lifecycle callback functions of Ability?
Which of the following service SDKs has been integrated with device-cloud integration?
HarmonyOS adopts a multi-core design, which supports the selection of appropriate OS kernels for different resource-constrained devices, and which of the following capabilities does the kernel provide for the operating system?
When using DevEco Studio for debugging, you need to check the properties in configjson regardless of whether you use a real machine or an emulator.
A developer tries to update the text of Text directly in a non-UI thread, but the update fails, how to solve the problem of updating the UI of the non-UI thread in HarmomyOS??
HarmonyOSprovides developers with different abilities according to different application scenarios, for example, if a developer plans to develop a background music playback function, which of the following is correct about the configuration of the ability in config.json?
A developer obtains a log content: static finalHiLogLabel LABEL = new HiLogLabe1
(HiLog.LOG_APP,Ox00201, "MY_TAG"); Which of the following information can't be obtained?
Which of the following is the callback behavior of the Page Ability lifecycle that can destroy the page?
Which of the following subsystems is not part of the basic software service subsystem of HarmonyoS?
Which of the following scenarios does not use encoding technology?
Inwhat form will the application package of Harmony OS be released and put on the shelves?
Both the provider and user of DataAbility use a URI (UnifomResourceldentifier) to identify a specific data, and the format of the URI is as follows:
Scheme://[authority]/[path][? query][#fragment]
Which is the correct URI description in the cross-device scenario and the local device scenario?
In the process of coding, software development engineers need to detect whether the Butfer data is read and whether an exception occurs, which of the following methods can be called?
A developer is developing an online education application, and there are multiple choice questions and multiple choice questions in the studentAnswer:interface, which of the following components is suitable for displaying multiple choice questions?
Which of the following options is allthe components ofthe Harmony OS package?
When a developer needs to specify the exact coordinates of the x-axis and y-axis of a sub-component when laying out a component, which layout can be used to achieve this function?
Which of the following belongs to the lifecycle of starting a Service Ability?
When a developer develops a JavaScript application on a smart screen. If you want to do some static animation, if you want to move a component 200px horizontally, which of the following styling configurations is correct?
The distributed soft bus is the base for communication between various devices, which of the following does not belong to the bus hub of the distributed soft bus?
If a developer wants to develop a Data Ability for the storage and management of application data, which of the following can help the developer realize the function of inserting multiple pieces of data into the database at one time?
A HarmonyOS developerdevelops an application based on distributed data services, and the developer uses device A, device B, and device C to test the functionality of the application in a distributed scenario. In the test, after device A successfully adds, deletes, and modifies data, device B and device C cannot read the updated data immediately, but after a certain time window, the data of the three devices will reach the same state. In the preceding scenario, what kind of consistency does the application conform to in a distributed database?
Which of the following is NOT acomponent of the Harmony OS object-relational mapping database?
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?
The developer uses device A (local device) to control device B (remote device) to open the album, which distributed task scheduling capability is used in this scenario?
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);
}
A developer uses HarmonyOS to write half of an email on his mobile phone and click the transfer button to the tablet to continue editing the email.
When the system destroys a page, which of the following callback methods will be triggered?
A developer needs to use the current scattered data network for socket data transmission, in this scenario, the development process involves the following steps: 1. Use socket to send data.2. Call NetHandle.bindSocket() to bind the network.3. Call NetManager.getDefaultNet() to get the default data network.4. Call NetManager.getInstance(ContextWhen the developer sorts out the development steps, the above steps are sorted according to the order in which the functions are completed in the code. Which of the following is the correct order?
When a developer calls HarmonyOS Abi1ity Resources (HAR) in an application module, he or she needs to merge the config.json file of HAP and the config.json file of HAR into a single config.json file when compiling and building a HarmonyS Ability Package (HAP). During the merging process, under what circumstances will the values of tags conflict?
The HarmonyOS video module supports the development of video services and the opening of the ecosystem, allowing developers to easily play, operate, and develop new functions of video media through the open interfaces. Video playback includes playback controls, playback settings, and playback queries, such as start/stop playback, playback speed settings, and whether to loop playback. When developing a video playback feature, which of the following steps is correct?
A developer is developing a ticket booking application, in the selection of the location of the ticket, you need to use the slide selector Picker, in order to highlight the selected text, the developer sets the rendering effect that the selected text margin is greater thanthe ordinary text margin. Which of the following settings are correct?
When a developer was developing a ticket booking application, he used the sliding selector TimPicker in the time selection of air tickets, according to the requirements of the airline, the time does not need to display the second information, which of the following can meet the needs?
In the declarative development paradigm, which of the following decorator decorated state variables needs to be initialized locally, and the initialized value can be overridden by the construction parameters?
It is necessary to apply for the permission of certain operation sensitive capabilities. Which of the following is NOT considered a sensitive capability?
When the engineer is developing JS (JavaScript), the application can successfully load the local image in the common path, but cannot load the network image.
After the creation of a custom component of the Web development paradigm, which of the following callbacks will be triggered when it is added to the Page component tree?
If a developer needs to solve problems such as insufficient image resolution and image compression noise, which of the following AI capabilities can be used by HarmonyOS?
In the JavaScript UI framework, which layer is used to provide animation parsing, DOM (Document Object Model) tree construction, layout calculation, rendering command construction and drawing, event management, etc.?
When a user is traveling by car, a navigation route is planned on the mobile phone, and after getting into the car, the user migrates the mobile phone navigation to the large screen of the car machine. In this scenario, which interface is used to implement cross-device migration?
When a developer adds a Harmony OS app on the AppGallery web page, which platform does the developer need to choose to add the app?
In the HarmonyOS system architecture, which of the following can shield the differences between multiple cores and provide basic kernel capabilities for the upper layer?
When a developer specifies a music playback service through an intent when closing a remote service, the developer can realize the ability to disable music playback on remote devices.
If a developer needs to use asyncDispatBarrionr to set up a barrier asynchronously, in this scenario, in order to separate different task groups, which of the following can the developer choose?
How do I define the permissionscorrectly when a developer needs to customize the permissions for a third-party application forHarmony OS?
A HarmonyOSuser downloads and installs a new application, which has declared some non-sensitive permissions in the config.json file, and the application may involve some sensitive permissions during running. Which of the following is correct in this scenario?
If a developer wants to use the video playback function of HarmonyOS, which of the following subsystems will he use?
When a developer is developing a game application, in order to display the download progress of game resources, it is necessary to use a horizontal linear progress bar, which of the following components can help the developer complete this function?
Which of the following is NOT a capability provided by Distributed Device Virtualization in HarmonyOS?
A developer now needs to make a motion track recording application, which can report the user's location information in real time. Which of the following is correct?
When a developer receives a new product demand and asks users to remake old documents such as paper letters into electronic versions, the application can improve the remake effect of the old documents and make the work more correct. What kind of AI-enabled capabilities can be leveraged by HarmonyOSto achieve this?
Which option is not the process of decoding in the conversion of the following information?
Which of the following descriptions of the HarmonyOSclipboard function is correct?
In the HarmonyOSsystem architecture, which of the following provides unified peripheral access capabilities and driver development management framework?
WhenthePage of Harmony OS executes the onForeground() callback, which of the following states will the Page return to first?
When I use the interface to set the system time in HarmonyoS, which of the following is the smallest time unit?