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A developer has developed an Image component and written the following code, which of the following descriptions of the component is correct?
HarmonyOS's AI capability provides the function of generating QR codes, for example, if you need to generate a QR code for each mobile phone contact, which of the following describes the QR code correctly?
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?
A developer needs to cancel a task, but part of the code segment he wrote was deleted by mistake. The remaining codes are as follows, with the missing codes indicated by the dash:
TaskDispatcher dispatcher =
getUlTaskDispatcher();
Revocable revocable =
________________________(new Runnable(){
@Overide Public void run(){
HiLog.info(L . ABEL_ _LOG,"delay dispatch");
}
},10);
Boolean revoked = revocable.revoke();
HiL og.info(L _ABEL_ LOG),"%{public}b" ,revoked);
Which of the following might be missing pieces in the above code?
A Page Instance can contain a group of related pages, and each page is represented by an AbilitySlice instance.
The callback mechanism provided by the Ability class can allow the Page instance to switch with the user's operation background
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?
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?
When the system destroys a page, which of the following callback methods will be triggered?
When a developer uses HarmonyOS Device Manager, he wrote the following code, which code description is correct?
Vardevicelnto=dmInstance.getLocaIDevicelnfoSync () :
A developer uses the threading function of HarmonyoS and writes the following code, which is the correct order of the execution result of the code?
TaskDispatcher globalTaskDispatcher =
getGlobalTaskDispatcher(TaskPriority.DEFAULT);
globalTaskDispatcher.syncDispatch(new
Runnable(){
@Override
public void run(){
HiLog.info (LABEL_LOG,"sync task1 run");//1
HiLog.info (LABEL_LOG, "after sync task1");//2
globalTaskDispatcher.syncDispatch(new
Runnable(){
@0verride
pub1ic void run(){
HiLog.info(LABEL_LOG,"sync task2 run"); 3
}
});
HiLog.info (LABEL_LOG, "after sync task2");//4
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?
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?
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??
A developer is developing an online education application, and there are multiple choice questions and multiple choice questions in the student Answer: interface, which of the following components is suitable for displaying multiple choice questions?
The Ability (referred to as "Service") of the Service template is only used for background running tasks, and the priority of background Services is relatively low, and when the resources are insufficient, the system may recycle the running background Service
HarmonyOS developers can use the "chos. Permission.CET_NET7ORK_INFO request permission to Modify Network Connection Status.
A developer wants to implement a registration and login function, and there are two pages, namely registration page A and login page B. When jumping from registration page A to login page B, which of the following is correct about the lifecycle of the two pages?
In HarmonyOS, which of the following scenarios is the application responsible for instantiation?
Which of the following gesture types does the HarmonyOS declarative development paradigm provide?
HarmonyOS adopts a multi-core design, which supports the selection of appropriate OS kernels for different resource-constrained devices, and the kernel abstraction layer provides basic kernel capabilities for the upper layer by shielding the differences between multiple cores, including which of the following?
Which of the following scenarios is part of the HarmonyOS notification function?
NetworkID is the communication identifier of distributed network device nodes in distributed networking, and is used to identify network device nodes in distributed services. To meet the privacy requirements in distributed scenarios, in which of the following scenarios will NetworkID change?
A developer has developed a news browsing application, and the news list page is displayed by default when the application is opened, which of the following methods does the developer use to achieve this function?
Which field needs to be configured in the module.json5 file for UIAbility startup mode?
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?
HarmonyOS provides developers with data management functions, which of the following are the following?
What is the format of the software package when uploading and publishing a software package?
What features can developers use to implement collaborative identity authentication through HarmonyOS?
The network management module of HarmonyOS provides a data network management function, which can effectively manage HTTP caches to reduce data traffic.
In a HarmonyOS application, which of the following and the ComponentContainer object are actually composed of the interface elements that the user sees?
A HarmonyOS developer develops 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 the background agent reminder function module supported from API9.
A manufacturer uses the HarmonyOS system to produce a smart oven, which is a lightweight system device in HarmonyOS.
How to realize distributed communication between two existing Harmony OS 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).
If a developer wants to develop a page with a tab function, the developer can use the TabList component provided by HarmomyOS. If you want to set the horizontal center alignment of text, which of the following codes is correct?
Regarding the position setting of the Tabs component tab, the following is the wrong description
Which of the following items is an asynchronous task dispatch method in HarmonyOS threads?
When I need to create a profile when publishing an application, what type should I choose?
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?
Regarding the Button component, which of the following styles is a capsule-type button?
A developer designed an application, when the user receives a notification, if the user clicks on the notification, it will jump to a new page, and if the notification is not clicked, the new page will not be triggered.
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 is used to recover the data?
Now a Text component is used as the title of a page, and the Text needs to be set to be invisible, but it still occupies the current layout space, which of the following is correct?
Which of the following is part of the basic software service subset in HarmonyOS?
A developer calls the getDefauitHOST(Context context) interface of Bluetooth HOST to obtain a Bluetooth HOST instance for managing local Bluetooth operations. This developer experiments with the following development steps to implement Bluetooth pairing. 1Turn on Bluetooth, 2Scan Bluetooth3 Initiate pairingWhich of the following statements about steps 1, 2, and 3 are correct?
Distributed task scheduling builds a unified distributed service management (discovery, synchronization, registration, and call) mechanism based on technical characteristics such as distributed soft bus, distributed data management, and distributed profile.
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.
When developing the list component in the JavaScript UI framework, you can use the data of the Map type to dynamically bind the data.
An engineer uses the WLAN P2P function, and the engineer can establish a P2P group.
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 focusable attribute of text is set to true. text component.
If a developer wants to develop a file background download function, there needs to be a Page Ability to provide UI pages, and a ServiceAbility to provide a background file download function. If you want to perform some operations in the Service Ability after connecting to the Service Ability in the Page Ability, you need to implement the onConnect() method in the Service Ability.
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.
If you need to use a composite animation, you can combine multiple animation objects and add them to the AnimatorGroup. AnimatorGroup provides two methods: runserially() and runParallel(), which indicate that the animation starts sequentially and the animation starts at the same time, respectively
A developer wants to use macOS for HarmonyOS application development, but the development tool DevEco Studio does not support macOS installation.
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.
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.
If the third-party library used by the developer involves permission management, the permission needs to be declared one by one in the config.json file of the application.
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.
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.
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.
With the help of HarmonyOS's Al capability, it can detect and recognize the text of image sources such as document remakes and street view reproductions, and can also be integrated into other applications to provide text detection and recognition functions, and provide translation, search and other related services based on the recognition results. This is by taking advantage of the super-resolution of text and images in AI.
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 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.
The global search portal provided on HarmonyOS has a desktop drop-down search box or a negative screen search box.
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 a developer starts a music player on a remote device, he or she may not fill in the Deviceld of the remote device.
Frame rate is the frequency (rate) at which a bitmap image appears continuously on a display in frames, measured in hertz (Hz).
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.
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 MainAbility of a HarmonyOS application has multiple AbilitySlices, and when the AbilitySlice health state is switched, the MainAbility state is INACTIVE.
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.
In a HarmonyOS application, there must be one and only one HAP of the feature type.
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.
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.
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.
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.
When MainAbility and MainAbiitySlice are bound together, the lifecycles of the two are synchronized, including the callback method for transitioning between states.
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 manufacturer used HarmonyoS to produce a dash cam (memory is 64MB), which is small in size and light in weight, and is a lightweight system device.
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 order to improve the image quality of network source images, developers can use the Instant Messaging (IM) class intent recognition interface provided by HarmoyOS.
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.
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.
In HarmonyOS, both relational databases and object-relational mapping databases can use SQL statements to manipulate databases.
When the Page of Harmony OS executes the onForeground() callback, which of the following states will the Page return to first?
When a developer develops an application based on Harmony OS, one of the HAPs (HarmonyOS Ability Package) needs to access the SQLite database to implement the following functions:
Function 1: Create a database.
Function 2: Insert data.
Function 3: Query data.
Which of the following descriptions of the developer's development steps is correct?
When a developer is developing a JavaSriptUI page of a shopping software, he needs to use the list component to display the product information, and which method of the list can be used to scroll to the specified item?
When a developer develops a HarmomyOS application, if a Text component is used as the title bar of the page, and its width is set to match_parent and its height is set to 50vp, how can the text content in the Text be centered when setting its properties in the layout file?
fter a developer sets :ohos:layout_alignment="horizontal_center" in the Text component, he writes: text.setMarginRight (600) in the code, where is the Text displayed in the parent layout?
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?
When the user migrates the video on the mobile phone to the smart screen for playback, there will be a pop-up prompt for the user to confirm whether to start the migration. During the migration process, which of the following methods is first called?
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?
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.
On the basis of the supported input events, HarmonyOS's multi-dimensional input defines some input actions commonly used by users as a set of standardized events, maps the input events of different input devices to the standardized events, and can obtain a unified experience when using multiple input devices to operate different terminal devices or applications.
In HarmonyOS, by default, the UI interface is displayed and updated in the main thread
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
HarmonyOS's distributed soft bus enables distributed management of application data and user data.
When a developer has multiple versions of the object-relational mapping database, and the developer calls the BookStoreUpgrade class to upgrade the database version, the version number of the BookStoreUpgrade class is configured as "2", and the actual version number of the current BookStore.db is "1".
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?
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?
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?
Which of the following belongs to the application layer in the HarmonyOS system architecture?
Which of the following is NOT a component of the Harmony OS object-relational mapping database?
When the developer jumps to a new page through the button button, the following code is created. If you don't add "" Button button = (Button) findComponentByld(ResourceTable.ld_button) ;" What happens to this line of code?
Public void onStart(Intent intent){
super.onStart(intent);
super.setUlContent
(ResourceTable.Layout_ability_main);
Button button =
(Button)findComponentByld(ResourceTable.ld_button);
button.setClickedListener(listener - > present(new
SecondAbilitySlice(),new Intent()));
}
If the user displays the navigation information on the mobile phone and the smart watch at the same time, if the smart watch is out of power, causing the navigation information to terminate the display, which callback method will the navigation application on the mobile phone receive the termination notification?
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.
Which of the following is the callback behavior of the Page Ability lifecycle that can destroy the page?
Which of the following modules provides an E2E encrypted channel in the HarmonyOS streaming architecture to provide a secure cross-terminal transmission mechanism for user applications?
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?
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?
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?
If a developer wants to use the JavaScript UI framework to develop a graffiti application that allows users to draw custom graphics, which of the following components can be used by the developer?
A developer uses the AI capabilities provided by Harmony OS to achieve the following functions: 1. Perform text detection and recognition of image sources such as document remakes and street view reproductions, and provide translation, search and other related services based on the recognition results. 2. Convert various bills into image information by taking pictures, and then use text recognition technology to convert image information into character information that can be used by computers and other equipment. In order to implement the above functions, which of the following I capabilities is most likely to be used by the developer?
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?
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?
Which of the following descriptions of the HarmonyOS clipboard function is correct?
Which of the services provided by the HarmonyOS Connect solution is Device Parter?
When developing a HarmonyOS application, which of the following is NOT a permission that should be followed?
In HarmonyOS, there are some applications that can call out universal cards, which can bring you the experience of using ().
Atomic service is a future-oriented service delivery method provided by HarmonyOS, which of the following statements about atomic service is correct?
Harmony OS adopts a multi-core design, which supports the selection of suitable OS kernels for different resource-constrained devices
After developing a HarmonyOS application, the developer needs 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?
Which of the following belong to the lifecycle callback method of Page Ability?
A software development engineer uses the traditional Bluetooth native management method to manage Bluetooth, which of the following functions can the engineer achieve?
Which of the following subsystems in the HarmonyOS subsystem belongs to the hardware service subsystem set?
Which of the following NFC functions can developers use when developing apps based on HarmonyOS?
When creating a test user for a meta-service, you need to select the storage location of the user list
What kind of struct is used to decoratively indicate that the structure has the ability to be componentized?
If a developer wants to obtain the location information of a HarmonyOS device, which of the following methods is correct?
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?
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?
HarmonyOS Capabilities are divided into two types: Feature Ability and Particle Ability.
A developer has developed a HarmonyOS application that remotely launches a Page on phone B, and which of the following permissions does not need to request the user to grant permission by sending a pop-up window at runtime?
What are the following development languages that a developer can use to develop a mobile app using HarmonyOS?
A developer has developed a news browsing application, and the news list page is displayed by default when the application is opened, which of the following methods does the developer use to achieve this function?
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)})
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?
Which of the following functions can be achieved through the sidebar button of the remote simulator?
If a developer uses custom components when developing a HarmonyOS application, what are the correct descriptions of custom components below?
The log content filtered by a developer through relevant information is: 01-20 16:08:36.908
23597/com.example.myapplication W
00201/MY-TAG:Failed to visit,reason:503.Which of the following cannot be obtained by analyzing this log?
Which of the following does not belong to the application framework layer in the Harmony OS system architecture?
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.
How do I define the permissions correctly when a developer needs to customize the permissions for a third-party application for Harmony OS?
When a developer is developing an online education application, he has designed a feedback function that provides a text input box for users to fill in suggestions, which of the following components can help the developer realize this function?
Which modules in the following figure can be installed and operated independently?
Which of the following service management mechanisms does HarmonyOS's distributed task scheduling consist of?
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.
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.
The user and provider of the service card do not require permanent operation, and when it is necessary to add, remove, or request to update the card, the card management service will pull up the card provider to obtain the card information.
HarmonyOS Distributed File Service can automatically share files under different accounts.
To publish sticky public events in armonyOS, the publisher must first apply for the permissions required to publish sticky public events in config.json.
Which of the following descriptions of the global concurrent task distributor and the concurrent task distributor is correct?
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.
What development tools do programmers do not need to install when developing HarmonyOS mobile apps?
The following description of the basic components of the ArkTS declarative development paradigm is correct
When a developer develops a social application, he needs to develop a plug-in that generates a contact QR code. In this scenario, the developer can use the code generation Al capability provided by HarmonyOS, which can return the corresponding QR code image byte stream based on the given string information.
HarmonyOS provides the Al capability of speech recognition, which can use machine learning technology to analyze the content of text messages of users in SMS or chat applications, and identify the user intent represented by the message content.
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?
When a user is on a video call,Want to migrate the mobile phone video to the smart screen for playback,When clicking Migrate,Find that the smart screen is already in the optional list,What are the correct descriptions of the scene?
Which of the following methods can a developer use to obtain the actual pixel size corresponding to 8VP on the current device?
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 0FF should be displayed on the closed state component. You can use the following code to meet your needs:
Switch btnSwitch=
(Switch)findComponentByld(ResourceTable.
ld_btn_switch);
btnSwitch.setStateOffText("ON");
btnSwitch.setStateOnText("OFF");
Which of the following functions is a lifecycle function for a custom component?
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?
Which of the following properties can be used for components that contain text elements, such as Text, Button, TextInput, etc.?
Encoding is the process of converting information from one form or format to another, which of the following can be encoded?
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.
If a reading app uses the language recognition capability provided by HarmonyOS, the app can automatically read a novel.
Which of the following functions does the HarmonyOS network management module provide?
The distributed database is based on the KV data model and provides KV access interfaces.
If a developer wants to implement the page swiping function in an application, which of the following components can be used to implement the function?
When using Bluetooth Low Energy in HarmonyOS, the peripheral device, as a client, can receive GATT connection requests from the central device, but cannot Answer: requests for reading and writing eigenvalue content from the central device.
Which of the following descriptions of traditional Bluetooth operation is correct for HarmonyOS devices?
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.
Which of the following service SDKs has been integrated with device-cloud integration?
Which of the following properties of state decorator decorating must be initialized locally?
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?
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.
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 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?
TESTED 10 May 2026