Which of the following partitions is specific to ESXi 4.0?

Which of the following partitions is specific to ESXi 4.0?

A.
usr

B.
swap

C.
vmkcore

D.
scratch

Explanation:
Best Practices for vSphere (ESX 4) Service Console Partitions
The following Custom Partitioning Design is recommended:
Mount Point Type Size
/ ext3 5.0GB
Swap 1600MB
/home ext3 512MB
/tmp ext3 2.0GB
/vmimages ext3 512MB
/var ext3 2.0GB
The installer also automatically creates the following partitions without displaying them:
/boot ext3 260MB
Vmkcore 100MB
* Upgrade to ESX 3.5 on systems with separate /usr partition requires manual
intervention
Since ESX 4 and 3.5can use all of the above partitions, the only partitions that can be
specific to ESXi 4.0 is /scratch.