QUESTION: 109

Which of the following statements is NOT correct about Android fragments?

Multiple fragments can be combined in a single activity.
The life-cycle of a fragment is totally independent of the activity hosting it.
Fragments have their own life-cycle.
You can add/remove fragments to and an activity dynamically, i.e. while the activity is running.

Answer(s): B

Explanation:

Fragment life cycle is closely related to the life cycle of its host activity which means when the activity is paused; all the fragments available in the activity will also be stopped.
Incorrect:
D: You can add or remove fragments in an activity while the activity is running.

Reference:

http://www.tutorialspoint.com/android/android_fragments.htm

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QUESTION: 110

Which of the following are benefits for using fragments in your application? (Choose two)

Simplify the reusability of UI components.
Build different layouts for different device configurations.
Add an action bar to your application.
Dynamically add and remove UI components to an activity.

Answer(s): B,D

Explanation:

B: Following is a typical example of how two UI modules defined by fragments can be combined into one activity for a tablet design, but separated for a handset design.
D: You can combine multiple fragments in a single activity to build a multi-plane UI.

Reference:

http://www.tutorialspoint.com/android/android_fragments.htm https://developer.android.com/guide/components/fragments.html

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QUESTION: 111

Which of the following you cannot achieve by creating your own View sub-classes?

Create a completely new customized View type.
Combine a group of View components into a new single component.
Specify when to destroy an activity and all its views.
Override the way that an existing component is displayed on the screen.

Answer(s): A

Explanation:

Incorrect:
B: A view can be comprised of multiple other views (otherwise known as a composite view). Such views are subclassed from the Android ViewGroup class (android.view.ViewGroup) which is itself a subclass of View.

Reference:

http://developer.android.com/training/custom-views/create-view.html

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QUESTION: 112

Which of the following is NOT true about method getWindow() of class Dialog?

It retrieves the current window for the activity.
It can be used to access parts of the Window API.
It displays the dialog on the screen.
It returns null if the activity is not visible.

Answer(s): C

Explanation:

Incorrect:
A: getWindow() retrieves the current window for the activity.
B: getWindow() can be used to directly access parts of the Window API that are not available through Activity/ Screen.
D: getWindow() returns the current window, or null if the activity is not visual.

Reference:

http://developer.android.com/reference/android/app/Dialog.html#getWindow()

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QUESTION: 109

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QUESTION: 111

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QUESTION: 112

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