Google New Grad SWE interview questions

One online assessment then final round consisted of 3 technicals and 1 behavioral. Overall it was a standard Google interview. Coding you couldnt run it and had to dry run it yourself.

Round 1: I was asked to solve a problem involving counting words spoken by individuals in a conversation. I used a dictionary for count and sorted them but the interviewer asked for more effiecient approach. So, I explained him other approach because we dont have enough time and also he asked some follow up questions ex: [('Person3', 6), ('Person1', 4), ('Person2', 3),('Person1', 2),('Person2', 4)] But the input will be in the format of file with the timestamps and everything for example "10:45 pm Hi" Round 2: The interviewer asked a graph problem related to routers about their connectivity.So, I coded using the adjacency List representation for their wireless connectivity and used DFS whether they are conected are not.This went smooth he also asked some followup questions. Round 3: The Interviewer asked me to implement Password Cracking system. This Person was very annoying he keep adding the constraints and really confused me with some silly questions like "How do you unlock any door if it is locked ? what pattern do you follow to unlock the doors ?" . If I get "No Hire" that would be definetely from him.