A public cloud is a platform that uses the standard cloud computing model to make resources -- such as virtual machines, applications or storage -- available to users remotely.

The main benefits of the public cloud are as follows:

• Near-unlimited availability.
• A reduced need for organizations to invest in and maintain their own on-premises IT resources.
• Scalability to meet workload and user demands.
• Fewer wasted resources because customers only pay for what they use.

Reference: https://cloud.google.com/docs/overview

Cloud Storage offers two systems for granting users access your buckets and objects: IAM and Access Control Lists (ACLs). These systems act in parallel - in order for a user to access a Cloud Storage resource, only one of the systems needs to grant that user permission.

For example, if your bucket's IAM policy only allows a few users to read object data in the bucket, but one of the objects in the bucket has an ACL that makes it publicly readable, then that specific object is exposed to the public.

Reference: https://cloud.google.com/storage/docs/access-control

• A) is not correct because Cloud Storage is not a data warehouse but an object storage service.
• B) is not correct because Dataflow is not a data warehouse but a data processing service.
• C) is correct because BigQuery is a data warehouse used for analytics.
• D) is not correct because Looker is not a data warehouse but a Business Intelligence platform.

• Option A is Incorrect. Since Genome sequencing requires performing analysis and needs speed, scalabiity and security, filestore is most apt.
• Option B is Correct. Local SSD is appropriate to be used for Media rendering. Option C is Incorrect. Cold storage is most optimal for data archiving.
• Option D is Correct. Local SSD is the most optimal choice for being used as a cache as it provides high IOPS and very low latency.
• Option E is Incorrect. Preemptible VMs are appropriate for batch jobs.

References: https://cloud.google.com/filestore https://cloud.google.com/storage/archival

https://cloud.google.com/local-ssd https://cloud.google.com/preemptible-vms

• Option A is Incorrect. Exactly once processing ensures that the Pub/Sub stream is processed exactly once.
• Option B is Incorrect. The seek and replay feature of Pub/Sub can reprocess messages by facilitating point-in-time rewind of backlog.
• Option C is Correct. It allows offline examination and debugging of messages to ensure no-delay processing of other messages.
• Option D is Incorrect. Filtering enables message filtering based on message attributes.
• 
  
• Reference: https://cloud.google.com/pubsub

Because google organize through cloud IAM.

Reference: https://cloud.google.com/docs/enterprise/best-practices-for-enterprise-organizations

Cloud SQL supports MySQL, PostgreSQL, Microsoft SQL Server.

The idea of the Sustained Use discount is that the longer you run a VM instance in any given month, the bigger discount you will get from the list price.

Reference: https://www.parkmycloud.com/blog/google-sustained-use-discounts/

Cloud Spanner offers transactional consistency, automatic sharding, SQL support, Automatic Replication and Unlimited Scale, if you check option " Cloud SQL" it is Limited Scale that‘s why Option " Cloud SQL" is incorrect.

Cloud Spanner is an enterprise level database service offered by Google cloud platform which offers relational and non-relational features.

Cloud Spanner:

Fully managed relational database with unlimited scale, strong consistency, and up to 99.999% availability.

– Get all the benefits of relational semantics and SQL with unlimited scale.

– Start at any size and scale with no limits as your needs grow.

– Enjoy high availability with zero scheduled downtime and online schema changes.

– Deliver high-performance transactions with strong consistency across regions and continents.

– Focus on innovation, eliminating manual tasks with capabilities like automatic sharding.

Once you set budget, monthly budget for your account it will be sending you multiple reminders of the amount being exhausted. When the amount becomes higher than the budget, it keeps emailing you about the budget and the charges coming on your account.

Create, edit, or delete budgets and budget alerts:

-Avoid surprises on your bill by creating Cloud Billing budgets to monitor all of your Google Cloud charges in one place. A budget enables you to track your actual Google Cloud spend against your planned spend. After you‘ve set a budget amount, you set budget alert threshold rules that are used to trigger email notifications. Budget alert emails help you stay informed about how your spend is tracking against your budget. You can also use budgets to automate cost control responses.

With Cloud Billing budgets:

– You can specify the time period for the budget, configuring budgets for monthly, quarterly, yearly, or custom time ranges.

– You can define the scope of the budget. For example, you can scope the budget to apply to the spend in an entire Cloud Billing account, or narrow the scope to one or more projects, and/or one or more services, and/or other budget filters applicable to your Cloud Billing account.

– You can set the budget amount to a total that you specify, or base the budget amount on the previous calendar period‘s spend.

– You can set threshold rules to trigger email alert notifications. When your costs (actual costs or forecasted costs) exceed a percentage of your budget (based on the rules you set), alert emails are sent to the recipients you specify.

– You can specify the recipients of email alerts in these ways: Using the role-based option (default), you can send email alerts to billing admins and users on the Cloud Billing account. Using Cloud Monitoring, you can specify other people in your organization (for example, project managers) to receive budget alert emails.

– You can also use Pub/Sub for programmatic notifications (for example, to forward your budget messages to other mediums or to automate cost management tasks).