Android is an open source, Linux-based software stack.

• True

• False

Which of the following choices is the main role of the button which is illustrated in the red rectangle over the Android Studio tool bar?

• Run button.

• Debug button.

• Apply changes button.

• ADV manager button.

Each Android application runs in its own process and with its own instance of ART on devices running Android version 8.0 (API Level 26) or higher.

• True

• False

Which of the following choices is the main role of the Preview button which is illustrated in the red circle of the vertical Android Studio tool bar?

• It shows the activity layout in text (XML) and design mode at the same time.

• It shows the activity layout in print review.

• It shows the Java or Kotlin code of an activity.

• It shows the activity blue print preview mode.

The Android library code is organized in such a way that it can be used by multiple Android applications.

• True

• False

The following image shows part of the content inside file activity_main.xml in an Android application:

Which of the following options is correct?

• The app user can select one radio button only at a time.

• The app user can select the two radio buttons at the same time.

• The only purpose of RadioGroup tag is adding a group of colors to the inside of the radio buttons.

• This is not an XML code; it is a Kotlin code.

android.view : This library contains the basic classes used for developing graphical user interface and for handling the user’s interaction with the user interface

• True

• False

Fill in the blank space in the following sentence with the correct choice:

The …………………… arranges widgets in positions relative to each other.

• RelativeLayout

• Linear Layout

• ConstraintLayout

• Table Layout

android.widget : This library contains (mostly visual) user interface components such as Button, Spinner, ListView to be used in your applications.

• True

• False

Fill in the blank space in the following sentence with the correct choice:

The ………………………… is a layout that arranges other views either horizontally in a single column or vertically in a single row.

• LinearLayout

• RelativeLayout

• ConstraintLayout

• Frame Layout