The correct answer is to modify the DB instance to increase the allocated storage. This resolves the ORA-00257 error because in Amazon RDS for Oracle, the flash recovery area size is directly tied to the total allocated storage; increasing the storage automatically expands the recovery area, providing immediate space for archive logs without manual deletion. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of RDS automated management and the distinction between manual fixes and scalable solutions—a common trap is choosing to delete logs manually, which is not efficient or automated. Remember that RDS handles underlying storage architecture, so scaling up is the most direct path to resolve an archive log full condition. Memory tip: when you see ORA-00257, think "Scale, not delete"—increase allocated storage to let the recovery area grow automatically.
DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
Refer to the exhibit.
-- The following error log was retrieved from Amazon RDS for Oracle:
ORA-00257: archiver error. Connect internal only, until freed.
-- The DBA checks archive log usage:
SELECT * FROM V$FLASH_RECOVERY_AREA_USAGE;
Refer to the exhibit. An Amazon RDS for Oracle instance is experiencing ORA-00257 errors. The DBA has already increased the archive log retention setting. What is the most efficient next step to resolve the issue without manual intervention?
Refer to the exhibit.
-- The following error log was retrieved from Amazon RDS for Oracle:
ORA-00257: archiver error. Connect internal only, until freed.
-- The DBA checks archive log usage:
SELECT * FROM V$FLASH_RECOVERY_AREA_USAGE;
A
Configure archiving to Amazon S3 to offload logs.
Why wrong: RDS Oracle does not support direct archiving to S3.
B
Reboot the DB instance to clear the recovery area.
Why wrong: Rebooting does not free space.
C
Modify the DB instance to increase the allocated storage.
Increasing storage automatically increases the recovery area size.
D
Manually delete old archive logs from the recovery area using RMAN.
Why wrong: This is manual and not efficient for ongoing prevention.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Modify the DB instance to increase the allocated storage.
Option C is correct. The error indicates the flash recovery area is full. The most efficient automated way is to modify the RDS DB instance to increase allocated storage, which also increases the recovery area. Option A is wrong because manually deleting logs is not automated. Option B is wrong because archiving to S3 is not a standard RDS feature. Option D is wrong because restarting does not free space.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Configure archiving to Amazon S3 to offload logs.
Why it's wrong here
RDS Oracle does not support direct archiving to S3.
✗
Reboot the DB instance to clear the recovery area.
Why it's wrong here
Rebooting does not free space.
✓
Modify the DB instance to increase the allocated storage.
Why this is correct
Increasing storage automatically increases the recovery area size.
Manually delete old archive logs from the recovery area using RMAN.
Why it's wrong here
This is manual and not efficient for ongoing prevention.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
OSPF neighbours must agree on key parameters.
Router ID selection can affect neighbour relationships and LSDB output.
OSPF cost influences the preferred path.
A route can appear in OSPF information but not become the installed route.
TExam Day Tips
→Check area mismatch first when OSPF adjacency fails.
→Review passive interfaces when a network is advertised but no neighbour forms.
→Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related DBS-C01 OSPF questions on adjacency and route selection.
Management and Operations — This question tests Management and Operations — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Modify the DB instance to increase the allocated storage. — Option C is correct. The error indicates the flash recovery area is full. The most efficient automated way is to modify the RDS DB instance to increase allocated storage, which also increases the recovery area. Option A is wrong because manually deleting logs is not automated. Option B is wrong because archiving to S3 is not a standard RDS feature. Option D is wrong because restarting does not free space.
What should I do if I get this DBS-C01 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related DBS-C01 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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