Android - Quiz 13

Which design pattern is used to get a way to access the elements of a collection object in sequential manner?

• Chain of Responsibility
• strategy
• Iterator
• Command

The invoker object then looks for the appropriate and corresponding object, which then executes the request. What design pattern is mentioned here?

• Visitor
• Chain of Responsibility
• Command
• Observer

How many threads can be executed at a time?

• Only one thread
• Only main (main() method) thread
• Multiple threads
• Two threads

Which of these keywords are used to implement synchronization?

• synchronize
• syn
• synch
• synchronized

How to copy contents of array?

• System.arrayCopy()
• Array.copy()
• Arrays.copy()
• Collection.copy()

Which of these keywords is not a part of exception handling?

• try
• finally
• thrown
• catch

AIDL stands for ….

• Android Interface Definition Language
• Android Intermediate Definition Language
• Android Interface Description Language
• Android Internal Definition Language

<EditText android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@={user.firstName}"/> What is "@=" in text attribute?

• It's fixed text
• It's two way data binding
• It's is dependency Injection syntax
• It's is one way data binding

What is Hilt?

• A library for database
• A library for dependency injection
• A library for composable
• A library for navigation

The Logcat window in Android Studio displays system messages, such as when a garbage collection occurs, and messages that you added to your app with the Log class. It displays messages in real time and keeps a history so that you can view older messages.

• True
• False