A Facebook recruiter added me from LinkedIn, then called me. After the phone review, she arranged an interview with a Facebook engineer. On May 20th, I had a Skype interview. The interviewer was a really polite and warm person. We talked about Facebook, and they gave me hints about the questions.

There will be two arrays like below; merge and sort them.

arr1 = {1, 5} arr2 = {3, 6, _, _}

result = 1, 3, 5, 6

When working with different threads than the main thread, which Android APIs do you use?

Why does Android destroy an activity?

How can you persist data?