Phone Screen :

• Minimalistic IDE : This was given for the interview
• I opted my language as Java
• Problem statement was mentioned verbally

  • EntityID = int
    Entity = {
    type : ‘file’ | ‘directory’
    name : String
    Children : Collections of files/directory
    Size : int

    }

• Calculate the size of entity ID which has been given
• FileSystem : HashMap<EntityID, Entity>
• Example :

root (ID : 2) :
		dir (ID : 1) :
				file (ID : 3 ) : size = 200b
				file (ID : 4 ) : size = 100b
		file (ID : 5) : size = 300b
So here the size of entityId=2 which is root is (200 + 100 + 300) which is 600b

FileSystem : HashMap<EntityID, Entity>

FileSystem : { 1 : {type='dir', name='dir', children=[1,5]},
					  2 : {type='dir', name='root', children=[3,4]},
					  3 : {type='file', name='file', size=200b},
					  4 : {type='file', name='file', size=100b},
					  5 : {type='file', name='file', size=300b}}

• Follow up :
  • If the data is static where would you store it ?
  • What if the file size if in GB ?
  • How would you handle for directory case ? (children might have file or dir)
• Final Verdict : Rejected

I was able to solve this and was able to give answer for the follow ups as well. But I don't know what went wrong.
Feedback was given as borderline in some areas and good in some areas.

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