Associate-Android-Developer 무료 덤프문제 온라인 액세스

Select correct statements about Hardware Abstraction Layer (HAL). (Choose two.)

• A.The HAL function both as apps for users and to provide key capabilities that developers can access from their own app. For example, if your app would like to deliver an SMS message, you don't need to build that functionality yourself - you can instead invoke whichever SMS app is already installed to deliver a message to the recipient you specify
• B.The HAL provides standard interfaces that expose device hardware capabilities to the higher-level Java API framework.
• C.The HAL consists of multiple library modules, each of which implements an interface for a specific type of hardware component, such as the camera or bluetooth module. When a framework API makes a call to access device hardware, the Android system loads the library module for that hardware component.
• D.Using a HAL, not using a Linux kernel, allows Android to take advantage of key security features and allows device manufacturers to develop hardware drivers for a well-known kernel.

The Testing Pyramid, shown in the Figure, illustrates how your app should include the three categories of tests: small, medium, and large. Medium tests are integration tests that:

• A.validate user journeys spanning multiple modules of your app.
• B.validate your app's behavior one class at a time.
• C.validate either interactions between levels of the stack within a module, or interactions between related modules.

Room can export your database's schema information into a JSON file at compile time. What annotation processor property you should set in your app/build.gradle file to export the schema?

• A.room.expandProjection
• B.room.schemaLocation
• C.room.incremental

For example, we have a BufferedReader reader, associated with the json file through InputStreamReader. To get a file data we can do this:

• A.var line: JSONObject ? try {
  while (reader.readJSONObject ().also { line = it } != null) {
  builder.append(line)
  }
  val json = JSONObject(builder.toString())
  return json
  } catch (exception: IOException) {
  exception.printStackTrace()
  } catch (exception: JSONException) {
  exception.printStackTrace()
  }
• B.var line: String? try {
  while (reader.readLine().also { line = it } != null) { builder.append(line)
  }
  val json = JSONObject(builder.toString())
  return json
  } catch (exception: RuntimeException) {
  exception.printStackTrace()
  } catch (exception: ArrayIndexOutOfBoundsException) {
  exception.printStackTrace()
  }
• C.var line: String? try {
  while (reader.readLine().also { line = it } != null) { builder.append(line)
  }
  val json = JSONObject(builder.toString())
  return json
  } catch (exception: IOException) {
  exception.printStackTrace()
  } catch (exception: JSONException) {
  exception.printStackTrace()
  }

Which build options in the Build menu to choose to delete all intermediate/cached build files.

• A.Rebuild Project
• B.Make Project
• C.Clean Project
• D.Generate Signed Bundle / APK
• E.Make Module