How can you update Salesforce record using Apex, when you don’t know Object API name, but you know record Id?

Using Dynamic Apex we can achieve this :

//Lets assume this is record Id
Id recId = 'a0P9000000ESXcV';
Schema.SObjectType token = recId.getSObjectType();
Sobject s = token.newSobject();
s.put('Id',recId );
s.put('Name', 'om');
update s;