- A
Configure multiple target S3 buckets to distribute the load.
Why wrong: DMS writes to one target; multiple buckets are not supported.
- B
Increase the amount of archive log space or reduce the log retention period on the source Oracle database.
More space or shorter retention prevents log space exhaustion.
- C
Enable automatic log archiving on the DMS replication instance.
Why wrong: DMS does not manage source database logs.
- D
Increase the memory allocation for the DMS replication instance.
Why wrong: Memory does not affect source archive log space.
Question 1,324 of 1,786
DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 data pipeline uses AWS DMS to replicate data from an on-premises Oracle database to Amazon S3 in Parquet format. The pipeline has been running successfully for months, but recently the DMS task status shows 'failed' with the error: 'The source database is running out of archive log space.' Which action should the engineer take to prevent this error?
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
✓
Increase the amount of archive log space or reduce the log retention period on the source Oracle database.
Option B is correct because the error 'source database is running out of archive log space' indicates that the Oracle database's archive log area is full. AWS DMS uses Change Data Capture (CDC) which reads from archive logs to replicate changes. Increasing archive log space or reducing log retention prevents this error. Option A is incorrect because distributing load across multiple S3 buckets does not address source log space. Option C is incorrect because DMS does not manage archiving; it only reads logs. Option D is incorrect because memory on the replication instance does not affect source archive log 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 multiple target S3 buckets to distribute the load.
Why it's wrong here
DMS writes to one target; multiple buckets are not supported.
- ✓
Increase the amount of archive log space or reduce the log retention period on the source Oracle database.
Why this is correct
More space or shorter retention prevents log space exhaustion.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
Enable automatic log archiving on the DMS replication instance.
Why it's wrong here
DMS does not manage source database logs.
- ✗
Increase the memory allocation for the DMS replication instance.
Why it's wrong here
Memory does not affect source archive log space.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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 DEA-C01 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Operations and Support — This question tests Data Operations and Support — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Increase the amount of archive log space or reduce the log retention period on the source Oracle database. — Option B is correct because the error 'source database is running out of archive log space' indicates that the Oracle database's archive log area is full. AWS DMS uses Change Data Capture (CDC) which reads from archive logs to replicate changes. Increasing archive log space or reducing log retention prevents this error. Option A is incorrect because distributing load across multiple S3 buckets does not address source log space. Option C is incorrect because DMS does not manage archiving; it only reads logs. Option D is incorrect because memory on the replication instance does not affect source archive log space.
What should I do if I get this DEA-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 DEA-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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Last reviewed: Jun 20, 2026
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