HOTSPOT
A company with 75,000 employees has an Office 365 tenant.
You need to install the Azure Active Directory Synchronization (AAD Sync) tool by using the least amount
of administrative effort.
Which versions of each product should you implement? (Select three)
Answer: 
Explanation:
The following components need to be installed:
Net 4.5.1
PowerShell (PS3 or better is required)
* Azure AD Sync requires a SQL Server database to store identity data. By default a SQL Express LocalDB
(a light version of SQL Server Express) is installed and
the service account for the service is created on the local machine. SQL Server Express has a 10GB size
limit that enables you to manage approximately 100.000
objects.
Should be .Net 4.5 and PowerShell 3… but I believe some SQL server should be used… we have 75 000 users, and the upper limit is 100 000 Objects. With 75000 users there will be thousands of distribution and security groups…
No i think that the answer provided is correct.. Even if there is thousands of distribution and security groups SQL database won’t create any new objets in fact but just link them
This is Correct:
https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect-prerequisites
Azure AD Connect requires .Net 4.5.1 as does the most recent version of Azure AD Sync:
https://msdn.microsoft.com/en-us/library/azure/dn757602.aspx