Windows Active Directory (AD) Interview Questions & Answers

Article Index

17) What is Schema Master ?

The schema master domain controller controls all updates and modifications to the schema. To update the schema of a forest, you must have access to the schema master. There can be only one schema master in the entire forest.

18) What is Domain Naming Master ?

The domain controller holding the domain naming master role controls the addition or removal of domains in the forest. There can be only one domain naming master in the entire forest.

Note: - 1. Forest-wide operations master roles are Schema Master and Domain Naming Master.

2. Domain-wide operations master roles are Rid Master, PDC Emulator Master and Infrastructure Master.

19) What is Relative ID (RID) Master ?

The domain controller assigned to allocate sequences of relative IDs to each domain controller in its domain. Whenever a domain controller creates a security principal (user, group, or computer object), the domain controller assigns the object a unique security ID (SID). The SID consists of a domain SID that is the same for all SIDs created in a particular domain and a relative ID that is unique for each SID created in the domain. At any time, there can be only one relative ID master in a particular domain.

20) What is PDC Emulator master ?

A domain controller that holds the PDC emulator operations master role in Active Directory. The PDC emulator services network clients that do not have Active Directory client software installed, and it replicates directory changes to any Microsoft Windows NT backup domain controllers (BDCs) in the domain. The PDC emulator handles password authentication requests involving passwords that have recently changed and not yet replicated. At any time, the PDC emulator master role can be assigned to only one domain controller in each domain.

21) What is infrastructure master ?

The domain controller assigned to update group-to-user references whenever group memberships are changed and to replicate these changes to any other domain controllers in the domain. At any time, there can be only one infrastructure master in a particular domain. The infrastructure master should not be located on the same computer as the global catalog if there is more than one domain controller in the forest.

22) What happen if Schema Master Failure ?

Temporary loss of the schema operations master is not visible to network users. It is not visible to network administrators either, unless they are trying to modify the schema or install an application that modifies the schema during installation. If the schema master will be unavailable for an unacceptable length of time, you can seize the role to the domain controller you’ve chosen to act as the standby schema master. However, seizing this role is a step that you should take only when the failure of the schema master is permanent.

23) What happen if Domain Naming Master Failure ?

Temporary loss of the domain naming master is not visible to network users. It is not visible to network administrators either, unless they are trying to add a domain to the forest or remove a domain from the forest. If the domain naming master will be unavailable for an unacceptable length of time, you can seize the role to the domain controller you’ve chosen to act as the standby domain naming master. However, seizing this role is a step that you should take only when the failure of the domain naming master is permanent.

24) What happen if RID Master Failure ?

Temporary loss of the RID operations master is not visible to network users. It is not visible to network administrators either, unless they are creating objects and the domain in which they are creating the objects runs out of relative identifiers. If the RID master will be unavailable for an unacceptable length of time, you can seize the role to the domain controller you’ve chosen to act as the standby RID master. However, seizing this role is a step that you should take only when the failure of the RID master is permanent.