HOTSPOT
Your network contains one Active Directory forest named adatum.com. The forest contains a single
domain.
The forest contains the domain controllers configured as shown in the following table.
Recently, a domain controller named DC4 was deployed to adatum.com. DC4 is in the Default-FirstSite-Name site.
The adatum.com site links are configured as follows.
The schedule for SiteLink1 is shown in the SiteLink1 exhibit. (Click the Exhibit button.)
The schedule for SiteLink2 is shown in the SiteLink2 exhibit. (Click the Exhibit button.)
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
Answer: 
Explanation:
* SiteLink1 replication is not available at 10:00.
* SiteLink1 and SiteLink2 replication is available at Friday at 23:00. Replication intervals are 15
minutes and 30 minutes respectively.
* DefaultIPSitelink will be used to replicate an object from DC1 to DC4. The replication interval of
DefaultIPSitelink is 180 minutes.
no-replication not available on 10am.
yes-replication from site1 to site 2(15min),replication from site2 to site3(30min)
no-no site available for replicate
You forgot to read this part of the question
“Recently, a domain controller named DC4 was deployed to adatum.com. DC4 is in the Default-FirstSite-Name site.”
N-Y-Y
Yes, but according to the picture above, there are no any other sites in DefaultIpSiteLink except DC4. Will he ever replicate?
You’re right doktor78
Lafegob forgot to read this part of the question
it’s N-Y-N
Isnt the DC3 in Site3 ? Where do you site the link ? From the image i See DefaultSiteLink has Site1 and Site2
Answer is N, Y, N.
DC4 has no other site link in common, so it can’t replicated.
“A site link bridge connects two or more site links and enables transitivity between site links. Each site link in a bridge MUST have a site in common with another site link in the bridge. The Knowledge Consistency Checker (KCC) uses the information on each site link to compute the cost of replication between sites in one site link and sites in the other site links of the bridge. Without the presence of a common site between site links, the KCC also cannot establish direct connections between domain controllers in the sites that are connected by the same site link bridge.”
https://technet.microsoft.com/en-us/library/cc753638(v=ws.10).aspx
How are we to know what other DCs are in the default site link? not enough info