Manage a solution that can span multiple database technologies →mediumMultiple ChoiceObjective-mapped
PCDE Practice Question: Manage a solution that can span multiple database technologies
A company uses Cloud SQL for MySQL to run an e-commerce application. They need to ensure that they can recover the database to any point within the last 4 days. They also want to minimize storage costs. Which configuration should they use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable binary logging with the 'log_bin' flag and set the transaction log retention to 4 days in the backup configuration.
Point-in-time recovery (PITR) in Cloud SQL for MySQL requires binary logging, which can be enabled with the 'log_bin' flag. The transaction log retention period can be set from 1 to 7 days. For 4-day recovery, set the retention to 4 days. Option B is correct: enable binary logging and set the transaction log retention to 4 days. Option A is wrong because automated backups alone only restore to backup time, not any point. Option C is wrong because disabling automated backups is not necessary—automated backups are still needed for initial restore points, but PITR uses transaction logs. Option D is wrong because point-in-time recovery is enabled by setting binary logging and retention; there is no separate 'point_in_time_recovery' flag.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable automated backups with a 4-day retention schedule.
Why it's wrong here
Automated backups with 4-day retention allow restore to backup times only, not any point in time. PITR requires binary logs.
- ✓
Enable binary logging with the 'log_bin' flag and set the transaction log retention to 4 days in the backup configuration.
Why this is correct
Correct! Binary logging enables PITR, and setting transaction log retention to 4 days allows recovery to any point within the last 4 days.
- ✗
Enable binary logging and set the transaction log retention to 4 days. Disable automated backups.
Why it's wrong here
Disabling automated backups would prevent initial restore points. PITR still requires automated backups as a baseline; the transaction logs fill the gaps between backups.
- ✗
Enable point-in-time recovery by setting the 'point_in_time_recovery' flag to true with a 4-day window.
Why it's wrong here
There is no separate 'point_in_time_recovery' flag in Cloud SQL for MySQL. PITR is configured by enabling binary logging and setting the transaction log retention.
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