VM Resource Requirements and Sizing Quiz

1. When planning VM resources, what percentage of physical resources should typically be reserved for the hypervisor?

5-10% of CPU and RAM

50% of all resources

1-2% of resources

No reservation needed

2. How does memory ballooning help optimize VM resource allocation?

Allows hypervisor to reclaim unused VM memory and redistribute it

Increases CPU clock speed

Improves network throughput

Reduces disk storage needs

3. A VM requires predictable performance with minimal latency. Which storage type is most appropriate?

Dedicated SSD storage on local or high-speed shared arrays

Shared network storage over standard Ethernet

USB external drive

Tape backup storage

4. When sizing storage for a VM, what factor should include growth projections?

Allocate 20-30% additional capacity beyond current requirements

Allocate exactly what is needed today

Allocate minimum possible space

Storage cannot be resized after creation

5. A VM's disk is configured as SCSI. What performance benefit does this provide over IDE?

Higher throughput and better I/O performance

Reduced power consumption

Improved network speed

Lower CPU usage

6. For a VM running a load-balanced web application, which resource should scale horizontally?

Number of VM instances and vCPU allocation per instance

Single VM storage size

Hypervisor firmware

Network cable gauge

7. What is the impact of CPU overcommitment on VM performance?

VMs compete for CPU cycles, causing scheduling delays

Improves overall system performance

Has no effect on performance

Increases RAM availability

8. A VM requires consistent 4 GB of RAM but occasionally spikes to 6 GB. How should you allocate memory?

Allocate 6 GB to handle peak demand

Allocate 4 GB exactly

Allocate 2 GB to save resources

Allocate 8 GB for overhead

9. Which VM sizing approach bases resource allocation on actual measured workload demand?

Right-sizing based on historical performance data

Allocating maximum possible resources

Using default settings for all VMs

Randomly assigning resources

10. A mail server VM experiences slow response times despite having free CPU and RAM. What should you investigate?

Disk I/O bottleneck and storage performance

Physical memory being overcommitted

Hypervisor kernel update

VM's BIOS settings

11. When sizing a virtual machine for a database server, which resource is typically the most critical bottleneck?

RAM and disk I/O speed

Network bandwidth alone

CPU cores only

Display resolution

12. A VM's network throughput is limited. Which hypervisor setting controls virtual NIC bandwidth?

Virtual NIC driver and bandwidth allocation settings

Physical disk size

Hypervisor kernel version

VM boot order

13. What is the primary advantage of using thin provisioning for VM storage?

Reduces physical storage consumption until space is needed

Increases network speed

Improves CPU performance

Eliminates the need for backups

14. A VM requires 500 GB of disk space but is allocated 1 TB. What should you monitor to prevent issues?

Free disk space within the VM's filesystem

Hypervisor CPU temperature

Network packet loss

RAM access speed

15. Which metric should you monitor to determine if a VM needs additional vCPUs?

CPU ready time and utilization above 80%

Total disk space used

Number of network connections

VM uptime in days

16. For a development environment VM, what is a reasonable CPU-to-RAM ratio?

1 vCPU per 0.5 GB RAM

1 vCPU per 2-4 GB RAM

1 vCPU per 8 GB RAM

1 vCPU per 16 GB RAM

17. A VM is allocated 2 vCPUs but experiences CPU throttling. What is the most likely cause?

The hypervisor is oversubscribed with too many VMs

The VM has insufficient network bandwidth

The VM's RAM is full

The storage is encrypted

18. Which storage configuration provides the best performance for a high-transaction VM workload?

SSD-backed storage with adequate IOPS

Shared network storage only

External USB drives

CD-ROM emulation

19. What is the primary purpose of memory overcommitment in virtualization?

To allocate more virtual RAM than physical RAM available

To increase CPU clock speed

To reduce network latency

To improve disk read performance

20. A web server VM requires 4 vCPUs and 8 GB of RAM. If the hypervisor has 16 physical cores and 64 GB of RAM, how many identical VMs can run simultaneously?

16

8

4

2

A+ Virtual Machine Resource Requirements and Sizing Quiz