How to get admin using getting the contact id and accountId [closed]

Question

User u = [SELECT Id,ContactId,Contact.AccountId FROM User WHERE Id = :UserInfo.getUserId()];

id conid=uContactId;
id acid=u.Contact.AccountId;

this are possible or not, please anybody help me

Answer 1

Accountid and contactid are populated if you run this as a community user /portal users .For admin Users those value are null