Android OA0-002 問題集

質問 1：
Which of these is the correct explanation of Android security functions?
A. To use some functions such as networking and hardware, configuration at the time of development as well as user usage approval is necessary.
B. Since Android does not provide encryption functions as standard, it is necessary to separately embed a library.
C. Android provides standard authentication mechanisms, such as user authentication and device authentication.
D. An Android application cannot refer to information persisted by another application.
正解：A

質問 2：
Which of these is the incorrect explanation of ddms?
A. You can use it to acquire screenshots of a terminal.
B. You can display a list of currently running threads and select one to check its stack trace.
C. You can do simulations of network zone speed and bandwidth limitations.
D. You can forcibly execute garbage collection and check the present heap usage status.
正解：C

質問 3：
Which is the android.util package class necessary to output strings to the LogCat window in Eclipse?
A. EventLog
B. DisplayMetrics
C. DebugUtils
D. Log
正解：D

質問 4：
Of these Service-defined events, which has a possibility of being called multiple times?
A. onDestroy
B. onCreate
C. onBind
D. onStartCommand
正解：D

質問 5：
Which of these is the correct procedure to create and use an SQLite database?
A. Extend the android.database.sqlite.SQLiteOpenHelper class, implementing the onCreate() method and onUpgrade() methods, then call the getWritableDatabase() method.
B. Implement the android.database.SQLiteOpenHelper interface, writing the implementation of the onCreate() and onUpgrade() methods, and pass it as a parameter to ApplicationContext.createOrOpenDatabase().
C. Declare an instance of the android.database.sqlite.SQLiteOpenHelper class and call each of the methods onCreate(), onUpgrade(), and getWritabieDatabase().
D. Call the ApplicationContext methods createDatabase() and openDatabase().
正解：A

質問 6：
The following code is a part of a program which sends a status bar notification. Which is the correct code to put into (1) so that it will automatically cancel the notification after it occurs?

A. notification.setFlags(Notification. FLAGJNSISTENT);
B. notification.flags |= Notification.FLAG_INSISTENT;
C. notification.setFlags(Notification.FLAG_AUTO_CANCEL);
D. notification.flags |= Notification.FLAG_AUTO_CANCEL;
正解：D