The correct answer is to use DynamoDB Accelerator (DAX) to cache write operations, partition data to distribute write load, and leverage adaptive capacity to handle uneven access patterns. These three patterns directly improve write performance by reducing latency through in-memory caching, spreading write traffic evenly across partitions to avoid hot spots, and allowing DynamoDB to automatically adjust throughput under varying workloads. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your ability to distinguish between performance optimization features and unrelated DynamoDB capabilities. A common trap is confusing global tables, which serve multi-region replication, with write performance tools, or mistaking TTL for a write-speed enhancer when it only handles automatic data expiration. For the exam, remember the mnemonic “CAP” for Cache (DAX), Adaptive capacity, and Partitioning—these are the three pillars for boosting write throughput.
DBS-C01 Workload-Specific Database Design Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. 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.
Which THREE design patterns are appropriate for improving write performance in Amazon DynamoDB? (Choose 3.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Partition data using a high-cardinality partition key
Options A, C, and D are correct: Using DynamoDB Accelerator (DAX) caches writes, partitioning data helps distribute write load, and using adaptive capacity handles uneven access patterns. Option B is wrong because global tables are for multi-region replication, not write performance. Option E is wrong because TTL is for automatic deletion, not write performance.
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.
✓
Partition data using a high-cardinality partition key
Why this is correct
High cardinality reduces hot partitions and improves throughput.
Related concept
Static NAT maps one inside address to one outside address.
✓
Use DynamoDB adaptive capacity to handle uneven access patterns
Why this is correct
Adaptive capacity automatically adjusts throughput to handle hot keys.
Related concept
Static NAT maps one inside address to one outside address.
✓
Use DynamoDB Accelerator (DAX) to cache write operations
Why this is correct
DAX reduces write latency by caching.
Related concept
Static NAT maps one inside address to one outside address.
✗
Enable DynamoDB global tables to distribute writes across regions
Why it's wrong here
Global tables add complexity and do not improve write performance within a single region.
✗
Implement TTL to automatically delete old items
Why it's wrong here
TTL is for data lifecycle, not write performance.
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.
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Partition data using a high-cardinality partition key — Options A, C, and D are correct: Using DynamoDB Accelerator (DAX) caches writes, partitioning data helps distribute write load, and using adaptive capacity handles uneven access patterns. Option B is wrong because global tables are for multi-region replication, not write performance. Option E is wrong because TTL is for automatic deletion, not write performance.
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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