After applying online, the recruiter dropped an email asking for a 15-minute phone talk. After the call, she set up a 45-minute phone screen with an engineer. I cleared the screen and went for an onsite loop. It was a very positive experience.

1. Check if characters of a given string can be rearranged to form a palindrome.
2. Pascal triangle.
3. String matching where one string contains wildcard characters.
4. Given an array of citations (each citation is a non-negative integer) of a researcher, write a function to compute the researcher’s h-index.