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Explain String vs StringBuilder vs SpannedString vs SpannableString vs SpannableStringBuilder vs
CharSequence ?

How to declare Global variables in Android?

What is Handler and what is it used for?

What is Explicit Intent?

What is a JobScheduler ?

Explain how HashMap works

What are Retained Fragments?

Explain key differences between Service and IntentService

Isn't Android's Bundle functionally equivalent with a Map ?

What is a LocalBroadcastManager ?

What is DDMS and what can you do with it?

How could you pass data between activities without Intent ?

What is RenderScript and when should we (really) use it?

What is the difference between Adapter and Loader in Android?

What is the difference between ListView and RecyclerView ?

What is the difference between invisible and gone for the View visibility status?

What are the differences between onCreate() , onCreateView() , and onActivityCreated() in Fragments
and what would they each be used for?

What is the difference between Service & Intent Service ?

What is Intent Filter?

How would you support different screen sizes?

What is the Support Library? Why was it introduced?

What is Android Data Binding?

When to use Android Loaders?

What is the difference between a Bundle and an Intent ?

Why Fragments, and when to use Fragments instead of Activities?

What are dex files are used for?

What is the actual differences between a Activity Context and Application Context?

What is the difference between Activity and Context ?

How would you communicate between two Fragments?

What are Android Annotations and what are they used for?

What is the difference between onCreate() and onCreateView() lifecycle methods in Fragment ?

When to use Fragment s vs Activitie s?

Describe different types of Services in Android

What is an Android PendingIntent ?

How can two distinct Android apps interact?

What is the difference between AsyncTask and Thread/Runnable ?

What are the permission protection levels in Android?

What does LayoutInflater in Android do?

What is Parcelable in Android?

What is the difference between compileSdkVersion and targetSdkVersion ?

When to use Android's ArrayMap instead of a HashMap ?

What is Implicit Intent?

What are the differences between ArrayList and ArrayMap ?

What is the difference between Handler vs AsyncTask vs Thread ?

What is ART?

Android Log.v() , Log.d() , Log.i() , Log.w() , Log.e() . When to use each one?