Online Access Free Associate-Android-Developer Practice Test

In general, you should send an AccessibilityEvent whenever the content of your custom view changes. For example, if you are implementing a custom slider bar that allows a user to select a numeric value by pressing the left or right arrows, your custom view should emit an event of type TYPE_VIEW_TEXT_CHANGED whenever the slider value changes. Which one of the following sample codes demonstrates the use of the sendAccessibilityEvent() method to report this event.

• A.@Override
  public boolean onKeyUp (int keyCode, KeyEvent event) {
  if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) {
  currentValue--;
  sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
  return true;
  }
  ...
  }
• B.@Override
  public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { boolean completed = super.dispatchPopulateAccessibilityEvent(event); CharSequence text = getText(); if (!TextUtils.isEmpty(text)) { event.getText().add(text); return true;
  }
  return completed;
  }
• C.@Override
  public boolean onKeyUp (int keyCode, KeyEvent event) {
  if (keyCode == KeyEvent.KEYCODE_ENTER) {
  currentValue--;
  sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED);
  return true;
  }
  ...
  }

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()
  }

To run your local unit tests, follow these steps:
1. Be sure your project is synchronized with Gradle by clicking Sync Project in the toolbar.
2. Run your test in one of the following ways (select possible): (Choose three.)

• A.To test all methods in a class, right-click a class or method in the test file and click Run .
• B.To run all tests in a directory, right-click on the directory and select Run tests .
• C.To run all tests in Project, open the Project window, and then right-click a test and click Run .
• D.To run a single test, open the Project window, and then right-click a test and click Run .

What do you want from Room when you create a DAO method and annotate it with @Delete?
Example:
@Dao
interface MyDao {
@Delete
fun deleteUsers(vararg users: User)
}

• A.Room removes a set of entities, given as parameters, from the database. It uses the primary keys to find the entities to delete.
• B.Room generates an implementation that inserts all parameters into the database in a single transaction.
• C.Room modifies a set of entities, given as parameters, in the database. It uses a query that matches against the primary key of each entity.

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