How do you answer this question "what is company code".
2) Is it necessary to create Sundry creditors a/c while we use Vendor a/c in SAP?

A company code is a seperate legal entity i.e. it is a unit which has to prepared it's own seperate P&L and Balance sheet.


Creation of sundry creditors depends on you business process.

 A company code represent an independent balancing/ legal accounting entity.
 No, i think so no necessary to create sundry creditors.

A company code is the legal entity for which we can prepare profit and loss accountand Balance sheet...

Sundry Creditors account is a reconciliation account and it is always adviced to maintain this account as we can reconcile our vendor accounts with sundry creditors account and secondly, while preparing the balance sheet we cannot show each and every vendor account we will show sundry creditors account balance only.