VM Resources

Question 1

What is the purpose of VM resources?

Answer 1

Core components that affect VM performance, scalability, and connectivity. Resources include CPU, RAM, storage, and network interfaces. Allocation determines how efficiently the host system supports each VM.

Question 2

What do virtual machines use for CPU processing?

Answer 2

Virtual machines use vCPUs allocated from the host’s physical CPUs.

Question 3

Who manages and schedules vCPUs?

Answer 3

The hypervisor schedules and manages vCPUs.

Question 4

Can multiple VMs share the same physical core?

Answer 4

Yes, multiple VMs may share the same physical core.

Question 5

How do more vCPUs affect VM performance?

Answer 5

More vCPUs improve performance for CPU-intensive tasks.

Question 6

What is the risk of overallocating vCPUs?

Answer 6

It may harm overall host performance.

Question 7

What must administrators do regarding CPU allocation?

Answer 7

They must balance CPU usage across VMs.

Question 8

What is RAM in virtualization?

Answer 8

RAM is short-term memory allocated to each VM from the host’s physical memory.

Question 9

How does RAM impact VM performance?

Answer 9

It impacts how many applications can run and how the VM performs under load.

Question 10

What is memory overcommitment?

Answer 10

Assigning more virtual memory than physically available.

Question 11

Why is memory overcommitment risky?

Answer 11

If multiple VMs use full memory simultaneously, it can cause performance issues.

Question 12

What does proper RAM management require?

Answer 12

Careful monitoring and adjustment based on workload.

Question 13

How is storage provided to VMs?

Answer 13

Through virtual disk image files on the host system.

Question 14

Name common disk image formats.

Answer 14

.qcow2, .raw, .vmdk.

Question 15

How does the guest OS see the disk image?

Answer 15

As a normal hard drive.

Question 16

What are benefits of virtual disk images?

Answer 16

Resizing, cloning, snapshotting, and portability.

Question 17

Name examples of disk interface types.

Answer 17

IDE, SATA, VirtIO.

Question 18

What affects VM read/write speed?

Answer 18

Host storage performance.

Question 19

Why is proper disk allocation important?

Answer 19

To prevent slowdowns under heavy load.

Question 20

What do VMs use for network connectivity?

Answer 20

vNICs (virtual network interface cards).

Question 21

How do vNICs appear in the VM?

Answer 21

As physical NICs.

Question 22

What do vNICs connect to on the host?

Answer 22

Virtual switches or bridges.

Question 23

Name common network configurations.

Answer 23

NAT, Bridged, Isolated/Internal.

Question 24

What does NAT mode do?

Answer 24

Uses host IP for external access.

Question 25

What does Bridged mode do?

Answer 25

Appears as a separate device on LAN.

Question 26

What does Isolated/Internal mode do?

Answer 26

Restricts traffic to VMs and host.

Question 27

Why is proper network configuration important?

Answer 27

Ensures connectivity and security.