Android Programming and Technical Programming Technical

What is a GCM in android?
Options
1) Google Cloud Messaging
2) Google Count Messaging
3) Google Message pack
4) None of the above

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Android Other Question
What are the functionalities of HTTP Client interface in android?

Options
1) Connection management
2) Cookies management
3) Authentication management
4) All of the above Is it mandatory to call onCreate() and onStart() in android?

Options
1) No, we can write the program without writing onCreate() and onStart()
2) Yes, we should call onCreate() and onStart() to write the program
3) At least we need to call onCreate() once
4) None of the above