Google ACE Deploying and Implementing a Cloud Solution Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  db-custom-16-60

  Why it's wrong here

  The suffix in a Cloud SQL custom tier denotes memory in megabytes, not gigabytes, so '60' means 60 MB rather than 60 GB. A 16-vCPU PostgreSQL instance with only 60 MB of memory is far below the minimum supported memory for that core count and would be rejected during creation. To request 60 GB, you must convert using 1 GB = 1024 MB, yielding 61,440 MB.

• ✓

  db-custom-16-61440

  Why this is correct

  This is the correct custom tier string because it conforms to the required db-custom-<vCPUs>-<memory_in_MB> format for Cloud SQL custom machine types. It specifies 16 vCPUs and 61,440 MB of memory, which is exactly 60 GB when applying the binary conversion factor of 1024 MB per GB. This string accurately represents the administrator's desired 16 vCPU / 60 GB configuration in the unit that Cloud SQL actually uses.

• ✗

  db-n1-standard-16

  Why it's wrong here

  This option uses a predefined tier name (n1-standard-16) rather than a custom tier. Cloud SQL for PostgreSQL custom machine types must start with 'db-custom', followed by the vCPU count and memory in MB, so 'db-n1-standard-16' is not in the correct format. Even though it includes 16 vCPUs, it has a fixed memory configuration and does not allow the exact 60 GB memory selection that the administrator requires.

• ✗

  db-custom-16-60000

  Why it's wrong here

  The memory value 60,000 MB is an incorrect conversion of 60 GB; using the standard 1 GB = 1024 MB gives 61,440 MB, not 60,000 MB. Computing 60,000 / 1024 shows that this actually equals about 58.59 GB, which does not match the requested 60 GB. Because Cloud SQL strictly interprets the suffix as megabytes, this tier string would create an instance with an unintended memory size, so it is invalid for this requirement.

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