Oath 面經

補發：
Oath Onsite --- Feb 15

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Interview 1:

• Follow up question asked on campus:
  
  
  

code how to find first unique char in a string... he gave the answer... asked me to implement:

Use HashMap and invalidate if encounter again...

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der would be the same)

follow up:

• what if we find smaller or equal to... something like comparator chage the logic of comparision
  
  
• worst cases tree?? and stack overflow... (there is iterative sol, we just mentioned but not implementing this)
  
  
• early termination... parent pointer...