DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 company has an Amazon DynamoDB table with on-demand capacity mode. They notice that write requests are being throttled during peak hours. The table has a global secondary index (GSI) that is also throttled. Which action should the database specialist take to resolve the throttling?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review the partition key design and consider adding a suffix to distribute writes more evenly.
Option C is correct because in on-demand mode, throttling can occur if a single partition key receives more than 1,000 WCU or 3,000 RCU. Adjusting the partition key design to spread the workload more evenly can resolve throttling. Option A is wrong because the table is on-demand, so switching to provisioned capacity might not help if the access pattern is uneven. Option B is wrong because the GSI inherits throttling from the base table; adding more GSI capacity is not applicable in on-demand mode. Option D is wrong because DynamoDB Streams do not directly affect throttling.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Review the partition key design and consider adding a suffix to distribute writes more evenly.
Why this is correct
Even distribution of write traffic across partitions reduces throttling.
Related concept
Static NAT maps one inside address to one outside address.
✗
Enable DynamoDB Streams to offload write operations.
Why it's wrong here
Streams capture changes but do not reduce throttling.
✗
Switch to provisioned capacity mode and increase write capacity units (WCU).
Why it's wrong here
On-demand already scales automatically; the issue is likely hot partition.
✗
Increase the write capacity of the GSI by updating the table's provisioned throughput.
Why it's wrong here
In on-demand mode, GSI capacity is not separately configurable.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
Management and Operations — This question tests Management and Operations — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Review the partition key design and consider adding a suffix to distribute writes more evenly. — Option C is correct because in on-demand mode, throttling can occur if a single partition key receives more than 1,000 WCU or 3,000 RCU. Adjusting the partition key design to spread the workload more evenly can resolve throttling. Option A is wrong because the table is on-demand, so switching to provisioned capacity might not help if the access pattern is uneven. Option B is wrong because the GSI inherits throttling from the base table; adding more GSI capacity is not applicable in on-demand mode. Option D is wrong because DynamoDB Streams do not directly affect throttling.
What should I do if I get this DBS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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