In order to cope with complex application business logic, a developer needs to create multiple threads to perform multiple tasks. In this case, the code is complex and difficult to maintain, and the interaction between tasks and threads becomes more complex. To solve this problem, which of the following interfaces can the developer use to distribute different tasks?

A user migrates video playback from his mobile phone to a smart screen and uses the distributed task scheduling capability of HarmonyOS. Which of the following is the process of connecting the video to the smart screen playback in this scenario?

HarmonyOS is designed for 1+8+N full-scene experience, which of the following devices belongs to the "8" in
1+8+N?

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 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.