Podcast
Questions and Answers
Which of the following is not one of the Popek and Goldberg's three properties of a Virtual Machine Monitor?
Which of the following is not one of the Popek and Goldberg's three properties of a Virtual Machine Monitor?
Moore's Law states that processing power doubles roughly every ______ months.
Moore's Law states that processing power doubles roughly every ______ months.
18
What is the term for running multiple workloads on a single host in virtualization?
What is the term for running multiple workloads on a single host in virtualization?
Consolidation
What is the modern term for a Virtual Machine Monitor?
What is the modern term for a Virtual Machine Monitor?
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TF-Virtualization is limited to servers and cannot be applied to desktops or applications.
TF-Virtualization is limited to servers and cannot be applied to desktops or applications.
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The first commercial x86 hypervisor was developed by _____ in 2001.
The first commercial x86 hypervisor was developed by _____ in 2001.
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What does the concept of "Containment" in virtualization refer to?
What does the concept of "Containment" in virtualization refer to?
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TF-Hypervisors abstract hardware resources from virtual machines and handle load balancing for optimal utilization.
TF-Hypervisors abstract hardware resources from virtual machines and handle load balancing for optimal utilization.
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TF-A snapshot captures the state of a virtual machine at a specific point in time and allows returning to that state repeatedly.
TF-A snapshot captures the state of a virtual machine at a specific point in time and allows returning to that state repeatedly.
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Cloning in virtualization duplicates both the ____ and the ____ of a virtual machine.
Cloning in virtualization duplicates both the ____ and the ____ of a virtual machine.
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The Open Virtualization Format (OVF) allows multiple virtual machines to be bundled into one package, designated by the ____ file extension.
The Open Virtualization Format (OVF) allows multiple virtual machines to be bundled into one package, designated by the ____ file extension.
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What is the main purpose of a template in virtualization?
What is the main purpose of a template in virtualization?
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What is the primary advantage of hot cloning compared to cold cloning?
What is the primary advantage of hot cloning compared to cold cloning?
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TF-Cold cloning requires the application to be inactive because the rate of data change might be too rapid for the migration process to complete.
TF-Cold cloning requires the application to be inactive because the rate of data change might be too rapid for the migration process to complete.
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Which of the following migration types involves converting a virtual machine from one platform to another?
Which of the following migration types involves converting a virtual machine from one platform to another?
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VMware tools are installed in a virtual machine for all except
VMware tools are installed in a virtual machine for all except
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TF-The virtual environment provided by a Virtual Machine Monitor should be identical to the physical environment to meet the property of fidelity.
TF-The virtual environment provided by a Virtual Machine Monitor should be identical to the physical environment to meet the property of fidelity.
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_______ allows better CPU utilization and provides up to 30% additional performance per CPU by effectively doubling the number of visible CPUs.
_______ allows better CPU utilization and provides up to 30% additional performance per CPU by effectively doubling the number of visible CPUs.
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When a snapshot is created, the original virtual machine disk is _____ and changes are written to a _______ disk. Reverting to the snapshot ____ the child disk, while deleting the snapshot ________ the changes into the original disk.
When a snapshot is created, the original virtual machine disk is _____ and changes are written to a _______ disk. Reverting to the snapshot ____ the child disk, while deleting the snapshot ________ the changes into the original disk.
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Virtual appliances are prebuilt and pretested ____ that already contain the necessary components to deploy their application. They are faster to deploy because the entire appliance is replaced during _____ or updates.
Virtual appliances are prebuilt and pretested ____ that already contain the necessary components to deploy their application. They are faster to deploy because the entire appliance is replaced during _____ or updates.
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TF-The installation of VMware Tools is mandatory in a VMware environment.
TF-The installation of VMware Tools is mandatory in a VMware environment.
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On Linux systems, a system process is also known as a
On Linux systems, a system process is also known as a
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TF-In a Linux virtual machine, the VMware tools must be installed as a root user.
TF-In a Linux virtual machine, the VMware tools must be installed as a root user.
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Architecture of Type 1 Hypervisor
Architecture of Type 1 Hypervisor
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Thick or Thin Provisioning-Imagine you are managing a server with 150GB of physical storage. You are tasked with creating three virtual machines.
VM1: Requires 30GB of storage and is set up with thick provisioning.
VM2: Requires 50GB of storage and is set up with thin provisioning.
VM3: Requires 150GB of Storage and is also set up with thin provisioning.
- How much physical storage will be pre allocated for virtual machine 1?
- If virtual machines 2 and 3 each only use 50% of their allocated storage, how much total physical storage will be used?
- What is the potential risk of using thin provisioning for virtual machine 3 if it eventually consumes all its allocated storage?
Thick or Thin Provisioning-Imagine you are managing a server with 150GB of physical storage. You are tasked with creating three virtual machines. VM1: Requires 30GB of storage and is set up with thick provisioning. VM2: Requires 50GB of storage and is set up with thin provisioning. VM3: Requires 150GB of Storage and is also set up with thin provisioning.
- How much physical storage will be pre allocated for virtual machine 1?
- If virtual machines 2 and 3 each only use 50% of their allocated storage, how much total physical storage will be used?
- What is the potential risk of using thin provisioning for virtual machine 3 if it eventually consumes all its allocated storage?
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A host server has 4 processors, each with 8 cores. If you can allocate 8 vCPUs per pCPU, how many vCPUs can be allocated?
A host server has 4 processors, each with 8 cores. If you can allocate 8 vCPUs per pCPU, how many vCPUs can be allocated?
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What is the difference between a clone and a template?
What is the difference between a clone and a template?
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You are managing a visualized environment for a company. The sales team needs their virtual machines to be accessible from external networks to host client-facing web servers.
The finance team's virtual machines should remain isolated and only communicate internally within the host.
Which network type should you use for the following scenarios and why?
You are managing a visualized environment for a company. The sales team needs their virtual machines to be accessible from external networks to host client-facing web servers. The finance team's virtual machines should remain isolated and only communicate internally within the host. Which network type should you use for the following scenarios and why?
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TF-Network I/O control ensures that individual VMs or groups of VMs have guaranteed bandwidth during high usage periods, even on VMware ESX.
TF-Network I/O control ensures that individual VMs or groups of VMs have guaranteed bandwidth during high usage periods, even on VMware ESX.
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You need to perform maintenance on a virtualization host without disrupting running virtual machines or their applications.
What feature would you use to migrate running VMs to another host without interrupting user applications, and why is it so important for planned downtime?
You need to perform maintenance on a virtualization host without disrupting running virtual machines or their applications. What feature would you use to migrate running VMs to another host without interrupting user applications, and why is it so important for planned downtime?
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How does fault tolerance (FT) differ from High Availability (HA) in virtualization?
How does fault tolerance (FT) differ from High Availability (HA) in virtualization?
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Study Notes
Virtual Machine Monitors (VMMs) and Hypervisors
- Popek and Goldberg's three properties of a VMM do not include scalability.
- Moore's Law states that processing power doubles roughly every 18 months.
- Consolidation is the term for running multiple workloads on a single host in virtualization.
- A modern term for a VMM is a hypervisor.
- TF-Virtualization is not limited to servers; it applies to desktops and applications.
- The first commercial x86 hypervisor was developed by VMware in 2001.
- Containment in virtualization refers to deploying new applications in a virtual infrastructure.
- TF-Hypervisors abstract hardware resources from VMs and manage load balancing.
- TF-A snapshot captures a VM's state and allows returning to it.
- Cloning in virtualization duplicates both the hardware and software of a virtual machine.
- The Open Virtualization Format (OVF) bundles VMs into a package with the OVF file extension.
- A template in virtualization is a non-running, standardized mold for creating new VMs.
- The main advantage of hot cloning over cold cloning is that it allows active workloads to remain uninterrupted.
- TF-Cold cloning requires application inactivity due to rapid data changes during migration.
- V2V migration converts a VM from one platform to another.
- VMware tools do not enhance memory utilization.
- TF-A VMM's virtual environment should ideally match the physical environment for fidelity.
- Hyperthreading improves CPU utilization by doubling the visible CPUs, potentially boosting performance by 30%.
- When creating a snapshot, the original disk is locked, changes are written to a child disk. Reverting to the snapshot deletes the child disk, merging changes to the original disk.
- Virtual appliances are pre-built and tested VMs that include application components, deployed quickly with patching.
- TF-VMware Tools installation is not mandatory in a VMware environment.
- On Linux systems, a system process is called a daemon.
- TF-VMware Tools on a Linux VM must be installed by a root user.
Hypervisor Architectures
- Type 1 hypervisors use a bare-metal architecture.
- Type 2 hypervisors use a hosted architecture.
Provisioning and Storage
- With thick provisioning, VM1 pre-allocates 30GB of storage.
- With thin provisioning, if VMs 2 and 3 use 50% storage, a total of 130GB of physical storage is consumed.
- Using thin provisioning for a VM that consumes its allocated storage may require reallocation, which could potentially crash the hypervisor.
Virtual CPU Allocation
- With 4 processors and 8 cores per processor, allocating 8 vCPUs per pCPU results in 256 vCPUs.
Clones and Templates
- A clone is a copy of an existing VM.
- A template is a baseline for creating new VMs.
Network Types
- External access for the sales team requires a bridged network type (unique IP address).
- Internal communication for the finance team requires a NAT network type (isolation from external access).
Live Migration
- Live migration allows running VMs to move.
- It helps with scheduled downtime without disrupting users.
Fault Tolerance and High Availability
- Fault tolerance prevents application interruptions.
- High availability restarts VMs after a server crash.
Network I/O Control
- Network I/O control guarantees bandwidth for VMs, even under high usage.
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Description
Test your knowledge on Virtual Machine Monitors (VMMs) and hypervisors with this quiz. Explore key concepts such as scalability, consolidation, and snapshots. Perfect for those studying virtualization technologies and principles.
