1.
Mention the difference between RelativeLayout and LinearLayout?
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Xamarin Android interview questions.
Only challenges
- 2.
What is the difference between Bitmap and Drawable in Android?
Answer:
- 3.
What is a difference between Spannable and String?
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- 4.
What is an Activity?
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- 5.
Why is it recommended to use only the default constructor to create a Fragment?
Answer:
- 6.
How to persist data in an Android app?
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- 7.
Explain briefly all the Android application components
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- 8.
How do I pass data between Activities in Android application?
Answer:
- 9.
What is Dalvik?
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- 10.
Explain activity lifecycle
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- 11.
What is an AsyncTask?
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- 12.
Explain the build process in Android
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- 13.
What is ADB and what is it used for?
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- 14.
What’s the difference between onCreate() and onStart()?
Answer:
- 15.
In what situation should one use RecyclerView over ListView?
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- 16.
What is View Group? How are they different from Views?
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- 17.
How can I get the context in a fragment?
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- 18.
What is Armv7?
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- 19.
What is the Dalvik Virtual Machine?
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- 20.
How does the OutOfMemory happens?
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- 21.
What is an Intent in Android?
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- 22.
Tell about Constraint Layout
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- 23.
What is a ContentProvider and what is it typically used for?
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- 24.
What types of Context do you know?
Answer:
- 25.
Explain Android notification system
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- 26.
What is the most appropriate way to store user settings in Android application?
Answer:
- 27.
What is 'Context' on Android?
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- 28.
Is it possible to implement the model–view–controller pattern in Java for Android?
Answer:
- 29.
What are the differences between ArrayList and ArrayMap?
Answer:
- 30.
What is the difference between Handler vs AsyncTask vs Thread?
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- 31.
What is the difference between Service & Intent Service?
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- 32.
What is DDMS and what can you do with it?
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- 33.
What does LayoutInflater in Android do?
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- 34.
What are Android Annotations and what are they used for?
Answer:
- 35.
What is Intent Filter?
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- 36.
Explain String vs StringBuilder vs SpannedString vs SpannableString vs SpannableStringBuilder vs CharSequence
Answer:
- 37.
How would you communicate between two Fragments?
Answer:
- 38.
What is ART?
Answer:
- 39.
What are retained fragments?
Answer:
- 40.
When to use Android's ArrayMap instead of a HashMap?
Answer:
- 41.
How can two distinct Android apps interact?
Answer:
- 42.
Why fragments, and when to use fragments instead of activities?
Answer:
- 43.
What is Explicit Intent?
Answer:
- 44.
What is Implicit Intent?
Answer:
- 45.
What is the difference between compileSdkVersion and targetSdkVersion?
Answer:
- 46.
What is Parcelable in Android?
Answer:
- 47.
What is the support library? Why was it introduced?
Answer:
- 48.
When to use Android Loaders?
Answer:
- 49.
Isn't android's Bundle functionally equivalent with a Map?
Answer:
- 50.
What is the difference between invisible and gone for the View visibility status?
Answer:
- 51.
How could you pass data between activities without Intent?
Answer:
- 52.
How to declare global variables in Android?
Answer:
- 53.
What is the difference between onCreate() and onCreateView() lifecycle methods in Fragment?
Answer:
- 54.
What is a JobScheduler?
Answer:
- 55.
When to use Fragments vs Activities?
Answer:
- 56.
What is Handler and what is it used for?
Answer:
- 57.
What is the difference between AsyncTask and Thread/Runnable?
Answer:
- 58.
Explain key differences between Service and IntentService
Answer:
- 59.
What is the difference between Activity and Context?
Answer:
- 60.
What is Android Data Binding?
Answer:
- 61.
What are the permission protection levels in Android?
Answer:
- 62.
Describe Different Types of Services in Android
Answer:
- 63.
What is the difference between ListView and RecyclerView?
Answer:
- 64.
What is the best way to update the screen periodically?
Answer:
- 65.
What is an Android PendingIntent?
Answer:
- 66.
Android Log.v(), Log.d(), Log.i(), Log.w(), Log.e(). When to use each one?
Answer:
- 67.
What are dex files are used for?
Answer:
- 68.
What is RenderScript and when should we (really) use it?
Answer:
- 69.
Explain how HashMap works
Answer:
- 70.
How would you preserve Activity state during a screen rotation?
Answer:
- 71.
What is a LocalBroadcastManager?
Answer:
- 72.
What are the differences between onCreate(), onCreateView(), and onActivityCreated() in fragments and what would they each be used for?
Answer:
- 73.
What is the actual differences between a activity context and application context?
Answer:
- 74.
What is the difference between a Bundle and an Intent?
Answer:
- 75.
What is the ViewHolder pattern? Why should we use it?
Answer:
- 76.
What is the difference between Adapter and Loader in Android?
Answer:
- 77.
How would you support different screen sizes?
Answer:
- 78.
Discuss Singletons vs. Application Context for app-global state
Answer:
- 79.
What are some best practices to avoid memory leaks on Android?
Answer:
- 80.
What is Broadcast Receiver?
Answer:
- 81.
What is the difference between getContext() , getApplicationContext() , getBaseContext() , and "this"?
Answer:
- 82.
What are best practices for storing and protecting private API keys in applications?
Answer:
- 83.
Explain how ArrayMap works
Answer:
- 84.
When to use SparseArray vs HashMap?
Answer:
- 85.
What is AIDL?
Answer:
- 86.
How do you handle Bitmaps in Android as it takes too much memory?
Answer:
- 87.
What are some differences between ART and Dalvik?
Answer:
- 88.
How to avoid reverse engineering of an APK file?
Answer:
- 89.
When is it necessary, or better to use a SurfaceView instead of a View?
Answer:
- 90.
Is a Dalvik virtual machine instance created for each application?
Answer:
- 91.
What is a Sticky Broadcast?
Answer:
- 92.
What is the difference between ANR and crash in Android?
Answer:
- 93.
What is the Android NDK? How can one use it? Why should one use it?
Answer:
- 94.
What is Doze? What about App Standby?
Answer:
- 95.
What is the StrictMode?
Answer:
- 96.
What are Android Architecture Components?
Answer:
- 97.
Can you manually call the Garbage collector?
Answer:
- 98.
Why to consider FlatBuffers over JSON?
Answer:
- 99.
What are some difference between Parcelable and Serializable?
Answer:
- 100.
What is the difference between Android timer and a Handler to do action every N seconds?
Answer:
- 101.
What is the difference between ArrayMap vs HashMap?
Answer:
- 102.
Provide some tips to reduce battery usage in an android application
Answer:
- 103.
What is a ThreadPool? And is it more effective than using several separate Threads?
Answer:
- 104.
What is the relationship between Looper, Handler and MessageQueue in Android?
Answer:
- 105.
What is the difference between Local, Normal, Ordered and Sticky broadcasts?
Answer:
- 106.
What is Intent vs Sticky Intent vs Pending Intent?
Answer:
- 107.
What happens if the user navigates away or closes the app while I still have a reference to the Activity the user just closed in my AsyncTask?
Answer:
- 108.
Explain when would you call getApplicationContext() and why?
Answer:
- 109.
Explain reasons why not to use getApplicationContext()?
Answer:
- 110.
When to use AIDL vs Messenger Queue?
Answer:
- 111.
What is the onTrimMemory method?
Answer:
- 112.
When would you use AIDL?
Answer:
- 113.
How can I use AsyncTask in different Activities?
Answer:
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