Stuff people often get wrong on GCP exams

I'm literally just going to rapid-fire list some of the things that are tested on GCP exams that people get wrong.

What are the three phases of a Migrate to Virtual Machines migration?

The three phases of a Migrate to Virtual Machines migration are: Discovery (finding and cataloging source VMs), Replication (continuously replicating VM data to GCP while the source VM is still running), and Cutover (performing the automated switch to move production workloads to Compute Engine).

How does Cloud KMS support PCI DSS compliance?

PCI DSS stands for Payment Card Industry Data Security Standards.

Cloud KMS can be used to provide the secure, centralized management of encryption keys that are used to protect cardholder data at rest and in transit.

What TCP ports must be open for all Dataflow jobs?

TCP 443 (HTTPS) is used for communication with the Dataflow service control plane, API requests, and metadata exchange.

It's for the nodes' external communication and is non-negotiable.

For streaming jobs, or batch jobs that require shuffling data between workers, TCP 12345 and 12346 are also necessary.

True or False: Sustained Use Discounts are automatic

True! They are not universal, but they automatically kick in once criteria are met.

What should you do first when you notice increased latency in a Dataflow pipeline?

Inspect logs at the pipeline and the worker level to identify specific stages in the pipeline with higher latency. Look for resource limitations, data skew, or dependencies in the pipeline that might be causing delays at particular stages. Professional Data Engineer.

What are the four types of persistent disks available as boot disks in Compute Engine?

Balanced = general workloads, balance of performance and cost

Standard = most basic disk, cheapest, low I/O workloads and backups

SSD (solid state drive) = high performance and IOPS for databases and analytics

Extreme = maximum performance, highest cost, for demanding databases