VCA VSphere Resource Management & Monitoring 5

Question 1

Which memory reclamation technique has the greatest performance impact and is used as a last resort?

Accepted Answer

Host-level swapping

Answer

Hypervisor swapping to disk is the most costly technique and is used only under severe pressure.

Question 2

Which component inside the guest enables memory ballooning?

Accepted Answer

The balloon driver installed with VMware Tools

Answer

The vmmemctl balloon driver is part of VMware Tools.

Question 3

When does Storage I/O Control begin enforcing datastore shares?

Accepted Answer

When datastore latency exceeds a congestion threshold

Answer

SIOC throttles based on shares once latency passes the configured threshold (default 30 ms).

Question 4

Where in the vSphere Client can you review recent operations such as VM power-on and migrations?

Accepted Answer

Tasks and Events

Answer

The Monitor > Tasks and Events views log operations and events.

Question 5

Which ESXi log file holds kernel-level messages such as storage path and driver events?

Accepted Answer

vmkernel.log

Answer

vmkernel.log records ESXi VMkernel messages.

VCA - VCA-DCV VMware Certified Associate on vSphere Practice Test