PREPARING FOR GOOGLE CLOUD CERTIFICATION: CLOUD ARCHITECT CERTIFICATE
Course 2 – Essential Google Cloud Infrastructure: Foundation
Week 2: Virtual Machines
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Create virtual machines using compute engine
- Recall the CPU and memory options for virtual machines
- Describe the disk options for virtual machines
- Explain VM pricing and discounts
- Use Compute Engine to create and customize VM instances
QUIZ: VIRTUAL MACHINES
1. Which statement is true of Virtual Machine Instances in Compute Engine?
- All Compute Engine VMs are single tenancy and do not share CPU hardware.
- Compute Engine uses VMware to create Virtual Machine Instances.
- In Compute Engine, a VM is a networked service that simulates the features of a computer. (Correct)
- A VM in Compute Engine always maps to a single hardware computer in a rack.
Correct: VMs in Compute Engine are a collection of networked services which includes persistent disks that are network-attached. In some cases the Google Cloud VM behaves unlike hardware or other kinds of virtual machines, for example, when a multi-tenant virtual CPU “bursts”, using excess capacity beyond the VM spec.
2. What are sustained use discounts?
- Per-second billing that starts after a 1 minute minimum
- Purchase commitments for specific resources you know you will use
- Automatic discounts that you get for running specific Compute Engine resources for a significant portion of the billing month. (Correct)
- Discounts you receive by using preemptible VM instances
Correct: That’s correct! Sustained use discounts are automatic discounts that you get for running specific Compute Engine resources (vCPUs, memory, GPU devices) for a significant portion of the billing month. To take advantage of the full 30% discount, create your VM instances on the first day of the month, because discounts reset at the beginning of each month.
3. Which statement is true of persistent disks?
- Once created, a persistent disk cannot be resized.
- Persistent disks are always HDDs (magnetic spinning disks).
- Persistent disks are encrypted by default. (Correct)
- Persistent disks are physical hardware devices connected directly to VMs.
Correct: Persistent Disks are not physical disks, they are a virtual-networked service. Each persistent disk remains encrypted either with system-defined keys or with customer-supplied keys.
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