The internship application process was as follows:

• Resume Submission
• HR email requesting more information: grades sheet (I'm a CS student), if I were to join FB what would interest me most to be working on, location preferences, etc.
• HR 10-minute screening
• 45-minute technical phone interview (if good)
• 45-minute technical on-site interview

1. Tell me about yourself.

2. Given each letter has a value (a=1, b=2, ..., z=26), compute the number of ways one can decode a given integer. For example:

   • 23 -> 2 [2, 3; 23]
   • 456 -> 1 [4, 5, 6]
   • 123 -> 3 [1, 2, 3; 1, 23; 12, 3]