The correct backup configuration is automatic backups plus binary logging to enable point-in-time recovery (PITR). This combination meets a 1-hour RPO because binary logs capture every transaction as it occurs, allowing you to restore to any point within the backup retention period—recovering data committed as recently as seconds ago, well within the one-hour window. For the 30-minute RTO, the most recent automatic full backup serves as a base, and applying the relevant binary logs from that point forward enables a rapid restore without needing to replay an entire day’s transactions. On the Google Professional Cloud Database Engineer exam, this scenario tests your understanding that PITR is the only way to achieve sub-hour RPOs with Cloud SQL, while a common trap is assuming that simply increasing automatic backup frequency alone can meet a 1-hour RPO—without binary logging, you can only restore to the last full backup time. Remember the mnemonic: “Logs for low RPO, base for fast RTO.”
PCDE Plan and manage database infrastructure Practice Question
This PCDE practice question tests your understanding of plan and manage database infrastructure. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A Cloud SQL instance stores financial data. They need to meet a 1-hour RPO and 30-minute RTO. What backup configuration should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Automatic backups plus binary logging to enable point-in-time recovery (PITR).
Option B is correct because automatic backups combined with binary logging enable point-in-time recovery (PITR), which allows restoring the database to any point within the backup retention period. This configuration meets the 1-hour RPO by recovering transactions committed within the last hour, and the 30-minute RTO by using the most recent full backup plus binary logs to restore quickly.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Export once a day to Cloud Storage.
Why it's wrong here
Daily exports cannot meet a 1-hour RPO.
✓
Automatic backups plus binary logging to enable point-in-time recovery (PITR).
Why this is correct
PITR with binary logs allows recovery to any point in the last 7 days, meeting the 1-hour RPO.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable high availability.
Why it's wrong here
HA provides redundancy but does not address backup and recovery point objectives.
✗
Automatic backups with a schedule of 1 hour.
Why it's wrong here
Automatic backups have a minimum 4-hour frequency, so 1-hour is not achievable with backups alone.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between high availability (HA) and backup/recovery; candidates mistakenly think HA alone satisfies RPO/RTO requirements, but HA only ensures uptime, not point-in-time data recovery.
Detailed technical explanation
How to think about this question
Binary logging in Cloud SQL (for MySQL, PostgreSQL, or SQL Server) records every data-modifying transaction in a binary log file. When PITR is enabled, Cloud SQL uses the most recent automatic backup and replays the binary logs from that backup time to the desired recovery time, achieving sub-second RPO. The binary log retention period is configurable (default 7 days), and the recovery process involves spinning up a new instance, applying the backup, and replaying logs, which typically completes within minutes for recent recovery points.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Plan and manage database infrastructure — This question tests Plan and manage database infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Automatic backups plus binary logging to enable point-in-time recovery (PITR). — Option B is correct because automatic backups combined with binary logging enable point-in-time recovery (PITR), which allows restoring the database to any point within the backup retention period. This configuration meets the 1-hour RPO by recovering transactions committed within the last hour, and the 30-minute RTO by using the most recent full backup plus binary logs to restore quickly.
What should I do if I get this PCDE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A Database Engineer is responsible for managing a Cloud SQL for MySQL instance. The engineer needs to ensure that automated backups are retained for 14 days and that point-in-time recovery (PITR) is enabled. Which configuration should the engineer set?
easy
A.Create scheduled manual backups each day and retain them for 14 days; PITR is not needed because backups are daily.
✓ B.Enable automated backups, set backup retention to 14 days, and enable binary logging.
C.Enable automated backups with a retention of 14 days; PITR is automatically enabled.
D.Enable automated backups with 14-day retention and set up a cross-region replica for disaster recovery.
Why B: Option B is correct because enabling automated backups with a 14-day retention ensures backup files are kept for the required duration, and enabling binary logging (which is required for PITR) allows point-in-time recovery by replaying transaction logs against a base backup. In Cloud SQL for MySQL, PITR is not automatically enabled with automated backups; binary logging must be explicitly enabled.
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Question Discussion
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