Recently I came across an interesting article that lists some of the interview questions for android developers of various levels. Here I will post links to my posts that answer those questions.

What is an Activity in Android?

http://www.andtuts.com/introduction-to-activity-in-android

What is a Layout in Android?

http://www.andtuts.com/an-introduction-to-android-layouts/

What is an Intent? How many different types do you know?

http://www.andtuts.com/introducing-intent-and-different-types-of-intent/