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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.
In order to avoid affecting the startup speed, developers need to postpone the execution of non-essential time-consuming tasks until the time of use, instead of performing all initializations in the onStart() method.
In HarmonyOS's "1+8+N" strategy, mobile phones belong to one of the "8" devices.
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.
The global search portal provided on HarmonyOS has a desktop drop-down search box or a negative screen search box.
When the user is driving a car, he cannot use the mobile phone with his hands free, but he can control the mobile phone through voice assistant interaction. The abovescenarios belong to a typical class of applications of entity recognition.
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.
Suppose that multiple AbilitySlice are associated in MainAbility, and multiple AbilitySlice are switched in the same page, the lifecycle of MainAbility and all AbilitySlice is synchronized.
When using EventHandler to implement inter-thread communication, if EventRunner takes out the InnerEvent event, EventRunner will directly process the event on the new thread.
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.
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.
HarmonyOS's distributed soft bus enables distributed management of application data and user data.
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 MainAbility and MainAbiitySlice are bound together, the lifecycles of the two are synchronized, including the callback method for transitioning between states.
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.
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.
HarmonyOS maintains a stack of AbilitySlice instances for each Page, and each AbilityS1ice instance that enters the foreground will be added to the stack.
Motion sensors may be a single physical sensor, or they may be composed of multiple physical sensors.
After the user enters a piece of text, with the help of the part-of-speech annotation interface, the application can perform automatic word segmentation, and label each word in the word segmentation result with a correct part of speech. However, the part-of-speech tagging feature provided by HarmonyOS only provides a fixed word segmentation granularity, and developers cannot customize the word segmentation granularity as needed when developing applications.
In the HarmonyOS system architecture, the distributed data management module belongs to the framework layer.
AbilitySlice and Page have the same lifecycle state and callback method with the same name, and when the Lifecycle of the Page changes, the same lifecycle change will occur in AbilitySlice. Similarly, as the lifecycle of an AbilitySlice changes, the lifecycle state of a Page changes.
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".
Use Textlnput to complete a password input box, which of the following values is recommended to set the type attribute?
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?
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.
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.
The ListContainer grid layout can be realized through the setLayoutManager() method
If a third-party application has registered the callback of the airplane mode setting item in advance, when the user modifies the airplane mode status of the terminal through the system settings, the application will detect the change of this setting item and adapt it. If the airplane mode is detected to be turned off, the app will go offline, and if the airplane mode is detected and turned on, the app will recapture the online data.
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.
When an engineer packages an application, DevEco Studio will package all the HAP (HarmonyOS Ability Package) modules in the project directory into the application, so if there are HAP modules in the project directory that do not need to be packaged into the application, the tool will automatically delete them and then compile and build the application.
The application package names of the application projects created by JavaSaript and the applications compiled by the Java projects are HAR (HarmonyOS Ability Resources) and HAP (HarmonyOS Ability Package), respectively.
When a developer is developing a HarmonyOS application, if part of the text in the value field of the JSON resource files of different types of elements in the Element directory does not need to be processed by the translator and will not be displayed on the application interface, a special structure can be used to identify the content that does not need to be translated
The way to find the object of the control declared in the Layout file by ID in HarmonyOS is findComponentByld().
A developer uses the Wi-Fi "Don't TrustHot-spotConfiguration" feature provided by HarmonyOS to add a specifiedhot-spotto its application, making it prioritize lower than the saved hot-spot. In this case, the system will refuse to connect to thehot-spoteven if it is the most suitablehot-spotafter the system scan.
A Page Instance can contain a group of related pages, and each page is represented by an AbilitySlice instance.
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.
The data generated by a developer's use of Data Ability can be shared between different applications on the same device, but cannot be shared across devices.
In order to improve the user experience, a developer uses ScrollView to realize the scrolling display of photos in an album application, and in order to improve the user experience, the developer sets the ScrollView rebound_effect property to true, so that the photo has a rebound effect when sliding to the bottom.
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.
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.
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.
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.
Which of the following functions does the HarmonyOS network management module provide?
Cross-terminal migration is a technical solution to realize the flow of user applications, which refers to the simultaneous or alternate operation of FA/PA on multiple terminals to achieve complete services.
HarmonyOS maintains a stack of AbilitySlice instances for each Page, and each AbilitySlice instance that enters the foreground will be added to the stack.
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.
A developer has multiple versions of the object-relational mapping database, and the developer calls the BOOKstoreUpgrade class to upgrade the database version, and the version number of the BOOKstoreUpgrade class is configured as "3", and the actual version number of the current BOOKstore.db is "1", in this case, TestormMigration12, TestormMigration23 The onMigration method is automatically called to complete the database upgrade.
HarmonyOS is classified according to the size of the device's memory, which of the following categories can be divided into?
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.
The HarmonyOS Media Management module provides capabilities for audio playback, audio recording, audio and video synthesis, and video decoding.
Knowing the variable int a=123, which of the following codes can successfully print the value of variable a in the console?
The main axis of the Row container is horizontal, and the cross axis is vertical, and its parameter type is VerticalAlign, and VerticalAlign defines the following types?
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.
What capabilities does the public event service provide for the application?
HarmonyOS supports on-demand elastic deployment of a variety of terminal devices.
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?
A manufacturer uses the HarmonyOS system to produce a smart oven, which is a lightweight system device in HarmonyOS.
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)})
Which of the following properties or events does the web component support?
What are the common problems in uploading software packages during the listing process of HarmonyOS applications/metaservices?
What are the scenario-based capabilities included in the HarmonyOS feature?
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?
Which of the following service SDKs has been integrated with device-cloud integration?
When using Bluetooth Low Energy in HarmonyOS, the peripheral device, as a client, can receive GATT connection requests from the central device, but cannotAnswer:requests for reading and writing eigenvalue content from the central device.
Encoding is the process of converting information from one form or format to another, which of the following can be encoded?
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?
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?
Which of the following properties can be used for components that contain text elements, such as Text, Button, TextInput, etc.?
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?
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.
The network management module of HarmonyOS provides a data networkmanagement function, which can effectively manage HTTP caches to reduce data traffic.
For example, if you want to implement an advertising pop-up window now, including information such as pictures and text, you can use the following pop-up window
In the same - Page, which of the following methods can be used to deal with the navigation between different pages?
If a HarmonyOS application developer writes the following code, what options are correct for the following code description?
Which of the following modules does the HarmonyOS forwarding architecture consist of?
If the HarmonyOS user displays the navigation information on the mobile phone and the smart watchat the same time, if the smart watch is out of power, causing the navigation information to stop displaying, which callback will the navigation app on the mobile phone distribute to receive the termination notification?
Ability and InternalAbility are two different ways to call PA (ParticleAbility) by FA (FeatureAbility).
In HarmonyOS, there are some applications that can call out universal cards, which can bring you the experience of using ().
The JS UI framework of HarmonyOSis a cross-device high-performance UI development framework that supports declarative programming and cross-device polymorphic UI. Which layer of the JS UI framework mainly completes front-end page parsing, and provides capabilities such as MVVM (Model-View-ViewModel) development mode, page routing mechanism, and custom components.
In order to complete the release of the application, an engineer needs to apply for a digital certificate, which of the following options is correct about the description of the digital certificate?
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.
ohos: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"/>
A HarmonyOS application developer displays three flowers in the form of a list, and the interaction logic code of the page is as follows.
In what ways can developers use device-cloud integration in DevEco Studio?
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 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?
After developing a HarmonyOS application, the developerneeds to package the application into an app for publishing it to AppGallery. You can use DevEco Studio to generate a key, in what format is the key stored in the keystore file?
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?
When a user uses the device camera to flip a blurry text file, he expects the camera app to provide a plug-in to improve the recognition of the text. Which of the following HarmonyOS service features is best suited to meet the needs of this user?
If the user migrates the video on the machine to the smart screen for playback, which of the following callback methods can save the video playback data on the mobile phone?
What functions does HarmonyOS provide in app data management to enable developers to seamlessly connect app data between different devices?
When a developer develops a HarmonyOS application and uses an intent pass object, which of the following descriptions of intent are correct?
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?
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;
If a HarmonyOSapplication developer wants to achieve the following effects, which of the following combinations can achieve the effect?
A)
B)
C)
D)
Whichof the following subsystems in Harmony OS can achieve data isolation between applications?
HarmonyOS Capabilities are divided into two types: Feature Ability and Particle Ability.
In HramonyOS, which of the following can developers use the static animation feature to achieve?
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?
What kind of struct is used to decoratively indicate that the structure has the ability to be componentized?
Which of the following combinations cannot realize two-way data synchronization between child components and parent and child components?
When a developer uses the distributed task scheduling capability of HarmonyOS, which of the following features can be selected by the developer?
When creating an application, which field in the config.json file must be the same as the application package name?
Which of the following sorting types does the trusted list of devices found by HarmonyOS Device Manager contain?
A HarmamyOS developer created three task distributors, serialtask dispatcher_aand 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?
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?
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?
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?
When using the capabilities or data of the corresponding service, you need to apply for the corresponding permissions, and the non-sensitive permissions need to be declared in which field of config.json?
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?
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 account 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 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?
When a developer develops an online education application, which of the following components can be combined into a single-choice question if the studentAnswer:ing interface has multiple choice questions and multiple choice questions?
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?
What development tools do programmers do not need to install when developing HarmonyOS mobile apps?
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?
To publish a public event with permissions in HarmonyOS, you need to set subscriber permissions in the code.
What types of conversion functions are supported for static animations in HarmonyOS?
Relational databases provide the ability to add, delete, modify, and query local data.
HarmonyOS single-version distributed databases do not enable automatic synchronization between networked devices by default, but you can enable automatic synchronization if necessary.
When an engineer compiles and builds a HarmonyOS Ability Package (HAP) with debugging signature information in DevEco Studio, he or she needs to apply for a debugging certificate and profile file in advance.
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?
What features can developers use to implement collaborative identity authentication through HarmonyOS?
A software development engineer will debug a piece of code, which of the following methods can be used?
The KV data model is a SQL-type database whose data is organized, indexed, and stored in the form of key-value pairs.
A Page Ability (hereinafter referred to as "Page") may consist of one or more AbilitySlice, which refers to the sum of a single page of an application and its control logic.
When using EventHandler to implement inter-thread communication, if the callback method of EventHandler and the processing method of EventHandler are used.
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.
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 home appliance manufacturer used HarmonyOS to produce a high-end refrigerator with a display (256MB of memory), which is not part of HarmonyOS's standard system device.
When a developer uses mobile phones and smart screens to develop applications, he can select two device types, smartphones and smart screens, in the AppGallery project.
In DevEco Studio, engineers can log in to the emulator after passing the real-name authentication of their HUAWEI ID.
The network management module of HarmonyOS can realize the communication between different processes of the machine, and the communication supports streaming socket technology.
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.
An engineer uses a simulator to debug a HarmonyOS application, which can support two types of HAP: signed and unsigned HAP (Harmomy0S Ability Package).
Which of the following descriptions of the HarmonyOSclipboard function is correct?
What is the process of cross-terminal migration from an application on HarmonyOS device A to the application on device B by calling the distributed task scheduling capability to continue sbility?
When an engineer needs to add the function of recording video when developing an application, which of the following interfaces should be called?
A developer is developing an alarm clock application, which of the following components can be used to set the hour, minute, and second of the alarm clock?
A developer obtains a log content: static final HiLogLabel LABEL = new HiLogLabe1 (HiLog.LOG_APP,0x00201,"MY_TAG");
Which of the following information can't be obtained?
A user migrates video from a mobile phone to a smart screen for playback and uses the distributed task scheduling capability of HarmonyOS. Which of the following belongs to the process of opening the smart screen playback software when the mobile phone is migrated in this scenario?
A developer has developed with the Text component, and the effect is as follows, which piece of code can be used to achieve the effect?
The key generated by the developer contains the public key and the private key used in asymmetric encryption, and in what format is the key stored in the key file?
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?
The engineer fails to access the network through the get request, and the prompt 'Attempt to invoke virtual method' is displayed, which of the following permissions should be configured in config.json?
If a UI is no longer visible to the user, but you don't want to destroy it, which method will the system call to release the corresponding resources?
If a developer needs to use asyncDispatchBarrier to set up a barrier asynchronously, in this scenario, in order to separate different task groups, the developer can choose which of the following task dispensers?
Which of the following modules does a developer need to call to check whether the HarmonyOS cellular data service is enabled?
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?
Which of the following is NOT a capability provided by Distributed Device Virtualization in HarmonyOS?
In order to ensure better responsiveness of the application, developers need to use the task distributor to design the priority of the task.
In order to test the distributed file service functions of application A and application B, the developer installs application A and application B on both device 1 and device 2. During the test, application A on device 1 creates a distributed file X, and application B on device 2 creates a distributed file Y. Which of the following descriptions of this scenario is wrong?
In distributed task scheduling, if a developer needs to coordinate access from multiple devices, what field in config.json does a developer need to apply for permission?
If a developer wants to develop a file background download function, there needs to be a Page Ability to provide UI pages, and a Service Ability to provide the background file download function. Which of the following can invoke Service Ability in Page Ability?
When a developer uses Page Ability to open a ServiceAbility, he needs to pass parameters through Intent, at what stage is the parameter obtained in the whole process null?
onStart( ) in A S ervice.
When a developer is developing a HarmonyOSapplication, if he needs to annotate information for a certain resource file of different types of elements in the Element directory to facilitate the understanding and use of the resource, which of the following methods can be added (XXX represents the comment text)?
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 uses the Text component for development, due to the long length of the input string, the content in the middle of the text needs to be truncated with ellipses. Which of the following codes can be used to achieve the above requirements?
When a developer uses HarmonyOS Device Manager, he wrote the following code, which code description is correct?
Vardevicelnto=dmInstance.getLocaIDevicelnfoSync () :
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.
When a developer specifies a music playback service through an intent when starting a remote service, device A (local device) can start the music playback capability of device B (remote device).
When developing a HarmonyOSapplication, what methods do I need to call when migrating the FA (Feature Ability) on device A to device B?
When a developer designs a PA (Particle Ability) application, which of the following development steps can be omitted?
In order to help users find data in the app through the global search app, a HarmonyOSdeveloper needs to index the data of the app and configure the global search searchable entities. Which of the following interfaces can the developer choose to index their application data?
An engineer uses a local simulator for application debugging, which of the following describes the error of the local simulator?
What lifecycle processes will be triggered when a developer creates a Page instance and lets the instance be displayed in the foreground?
When a developer clicks the exit button of an application to release PageAbility resources, which callback method in the ability lifecycle of the Pag package will betriggered?
In the HarmonyOSsystem architecture, which of the following provides unified peripheral access capabilities and driver development management framework?
The user migrates the video on the mobile phone to the smart screen for playback, and after the mobile phone saves the data, the smart screen calls back which of the following methods does the user recover the data?
A developer defines an entity class Student.java and uses the following code to construct a teaching table:
Entity(tableName="student",ignoredColums =["ignoredColumn1"," ignoredColumn2", indices =(@Index(value =("firstName." ,"lastName",name="name_index", unique = true)))
Public class User extends OrmObject{
@PrimaryKey(autoGenerate= true)
Private Integer userld;
Private String firstName;
Private String lastName;
Private int age;
Private double balance;
Private int ignoredColumnl;
Private int ignoredColumn2;
}
Which of the following descriptions of this code is wrong?
If an engineer is about to debug a Harmony OS application on an emulator device, which of the following correct debugging processes is the following?
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?
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?
If a developer wants to use the video playback function of HarmonyOS, which of the following subsystems will he use?
After a developer completesthe development of a Harmony OS application, it needs to be published to AppGallery
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?
A HarmonyOSuser downloads and installs a new app that has declared some non-sensitive permissions in the config.json file, and the app may involve some sensitive permissions during operation. Which of the following is correct in this scenario?
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?
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?
If a developer wants to develop an application on a smart screen, which of the following subsystems will he use?
TaskDispatcher is the basic interface for Ability to distribute tasks, which hides the implementation details of the thread where the task is located. To ensure that the application is more responsive, we respond to the priority of the design task, which of the following is not the priority of the task?
Which of the following options is allthe components ofthe Harmony OS package?
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.?
A developer designs a game application with MainAbility on the home page, click the game icon on the desktop, and then press the Home button to hide the game in the background, how does the life cycle of MainAbility change?
If a developer wants to develop a page with a tab function, the developer can use theTabList component provided by HarmomyOS. If you want to set the horizontal center alignment of text, which of the following codes is correct?
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?
TESTED 04 Oct 2024