You plan to deploy a SharePoint Server 2013 server farm.
You identify the following requirements:
The farm must be available if a single server fails.
The farm must support the creation of service applications.
All search components must be available if a single server fails.
Microsoft SQL Server database and SharePoint Server 2013 must not be deployed to the same
servers.
What is the minimum number of servers required for the deployment?
A.
2
B.
3
C.
4
D.
0
Explanation:
A three-tier farm configuration consists of two front-end web servers, an application server, and a
database server.
https://technet.microsoft.com/en-us/library/ee805948.aspx
The farm must be available if a single server fails. – means at least 2 front-ends and redundant SQL server (which is at least 2 servers)
The farm must support the creation of service applications. – no problem here
All search components must be available if a single server fails. – they can run on front-end servers as well
Microsoft SQL Server database and SharePoint Server 2013 must not be deployed to the same
servers. – that makes “2” servers option none applicable
Hence we need only 4 servers, 2 servers for SharePoint with all service applications, and 2 servers for redundant back-end (2 SQL servers with whatever HA solution is chosen)