5 in-house technical interviews.

4 algo/coding and 1 design.

• strtok implementation.
• Given a set of characters (duplicates possible) and a dictionary (list of words), find the longest word from the dictionary that can be made from the given characters. How will you do it if '*' (matches one wildcard character) is also included?
• Access card system design.
• Implement a stack with a find_min API as well.
• Given a set of points, find the line with the maximum number of points on it.
• UTF-8 byte stream verification and character extraction.

The most difficult part is judging what interviewers want who don't talk that much and just keep on scribbling stuff down.