220-1101 Virtualization Concepts — Timed 10 Questions

Question 1

A technician is troubleshooting a VM that cannot connect to the internet. The host has a single NIC and uses a Type 2 hypervisor. The VM's virtual switch is set to 'NAT'. Other VMs on the same host can access the internet. What is the most likely reason for the connectivity issue?

Accepted Answer

The VM's IP address is configured as static and does not match the NAT subnet. NAT mode typically works for internet access, but if other VMs are working, the problem is likely within the VM's network configuration. A misconfigured IP address or gateway can prevent connectivity even when the virtual switch is correct.

Answer

The virtual switch is set to 'Internal'

Answer

The host's firewall is blocking all outbound traffic

Answer

The hypervisor needs to be reinstalled

Question 2

A technician is troubleshooting a VM that frequently crashes with a 'blue screen' error. The host is a Type 1 hypervisor running on server-grade hardware with ECC RAM. The VM was created from a template and has been stable for months. Recently, the technician added a second virtual CPU to the VM. What is the most likely cause of the crashes?

Accepted Answer

The guest OS does not support symmetric multiprocessing (SMP) properly. Adding a second virtual CPU can expose timing and synchronization issues in the guest OS, especially if the application or OS is not optimized for multi-core. This is a known cause of instability in virtualized environments.

Answer

The host's ECC RAM has detected a memory error

Answer

The VM's virtual disk is fragmented

Answer

The hypervisor's CPU scheduler is overloaded

Question 3

A company is migrating a critical application from a physical server to a virtual machine. The application requires a static MAC address tied to its license. The technician performs a P2V migration and starts the VM, but the application fails to activate. The technician verifies that the VM has the same MAC address as the original physical server. What is the most likely cause of the activation failure?

Accepted Answer

The VM's BIOS UUID has changed from the physical server. Even with the same MAC address, the hypervisor presents a different hardware abstraction layer (e.g., motherboard chipset, BIOS) than the physical server. Many license activation mechanisms check multiple hardware identifiers, not just the MAC address.

Answer

The virtual switch is set to NAT, blocking the license server

Answer

The VM has insufficient RAM allocated

Answer

The hypervisor does not support the application's OS

Question 4

A technician is configuring a virtual machine to host a database server that requires consistent high disk I/O performance. The host uses a RAID 10 array of SSDs. Which virtual disk type should the technician select to minimize overhead and maximize performance?

Accepted Answer

Fixed-size virtual disk. A fixed-size virtual disk (also called thick provisioning) allocates all required space at creation, reducing fragmentation and I/O overhead compared to dynamically expanding disks. This is best for performance-sensitive workloads like databases.

Answer

Dynamically expanding virtual disk

Answer

Differencing virtual disk

Answer

Thin provisioned virtual disk

Question 5

A user has a laptop with 8 GB of RAM and runs a Type 2 hypervisor to test a Linux VM. The VM is configured with 4 GB of RAM, but the user notices the host OS becomes sluggish whenever the VM is running. The technician checks resource usage and finds the host is using 6 GB of RAM before starting the VM. What should the technician adjust to improve performance?

Accepted Answer

Reduce the VM's RAM allocation to 2 GB. The host only has 2 GB free, but the VM requests 4 GB, causing the host to use swap memory. Reducing the VM's RAM allocation to 2 GB will allow both the host and VM to run within physical memory, avoiding swapping.

Answer

Increase the host's virtual memory page file size

Answer

Enable hyper-threading on the host CPU

Answer

Switch the VM's network adapter from NAT to bridged

Question 6

A company wants to move a physical server running a legacy application to a virtual machine on a new hypervisor. The application is sensitive to hardware changes and requires the exact same hardware identifiers. Which migration method should the technician recommend?

Accepted Answer

Physical-to-Virtual (P2V) migration. Physical-to-Virtual (P2V) migration converts a physical machine into a virtual disk image, preserving the OS, applications, and hardware identifiers. This is the standard method for moving legacy systems to virtual environments.

Answer

Virtual-to-Virtual (V2V) migration

Answer

Physical-to-Physical (P2P) migration

Answer

Clone to template

Question 7

An IT administrator is planning to deploy multiple virtual machines on a single host for a development team. Each developer needs a separate environment with different OS versions. The host has a quad-core CPU with hyper-threading enabled and 32 GB of RAM. The administrator wants to maximize resource utilization while ensuring performance isolation. Which virtualization feature should be configured?

Accepted Answer

Resource pooling. Resource pooling allows the hypervisor to dynamically allocate CPU and memory from a shared pool to VMs as needed, balancing load and ensuring isolation. This is ideal for development environments where demand varies.

Answer

Virtual machine snapshots

Answer

Virtual switch VLAN tagging

Answer

Virtual machine cloning

Question 8

A user reports that their virtual machine is running very slowly. The host system has 16 GB of RAM, and the VM is configured with 8 GB. The host is running a Type 2 hypervisor on Windows 10. The technician checks Task Manager and sees that the host is using 14 GB of RAM. What is the most likely cause of the VM's poor performance?

Accepted Answer

The host does not have enough free RAM to support the VM's needs. The host is running low on available RAM because the VM's allocated memory is not being released efficiently, or other host processes are consuming memory. In a Type 2 hypervisor, the host OS manages memory, and if it is oversubscribed, the VM will experience swapping and slowdowns.

Answer

The VM's virtual CPU is overclocked

Answer

The hypervisor is not compatible with Windows 10

Answer

The VM's network adapter is set to NAT instead of bridged

Question 9

A technician is setting up a virtualized test environment where each virtual machine must have a unique MAC address and IP address, and the VMs must be able to communicate with each other and the physical network. The host has only one physical NIC. Which virtual switch configuration should the technician use?

Accepted Answer

Bridged (external) virtual switch. A bridged (or external) virtual switch connects VMs to the physical network through the host's NIC, giving each VM its own MAC and IP address on the same subnet. This allows full communication with other VMs and physical devices.

Answer

Internal virtual switch

Answer

Private virtual switch

Answer

NAT virtual switch

Question 10

A small business wants to run three different operating systems on a single physical server to save space and power. Each OS must have its own dedicated CPU cores, RAM, and storage, and the hypervisor must run directly on the hardware without a host OS. Which type of hypervisor should be deployed?

Accepted Answer

Type 1 hypervisor. This scenario describes a Type 1 (bare-metal) hypervisor, which installs directly on hardware and allocates dedicated resources to each virtual machine. Type 1 hypervisors are used in data centers and server virtualization to maximize performance and isolation.

Answer

Type 2 hypervisor

Answer

Container-based virtualization

Answer

Emulation virtualization