DBS-C01 Management and Operations Practice Question
A company is using Amazon DynamoDB with global tables (multi-region) for a gaming application. The application writes to a table in us-east-1 and reads from a table in eu-west-1. The team notices that writes in us-east-1 are taking longer than expected to propagate to eu-west-1. What is the most likely cause?
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
✓
Network latency between the regions is causing replication delay
DynamoDB global tables use asynchronous replication across regions, and network latency between regions is the primary factor causing delays in propagation. Option B is incorrect because read and write capacity is independent per region; insufficient capacity in eu-west-1 does not affect replication speed from us-east-1. Option C is incorrect while conflict resolution can occur with concurrent writes, it does not inherently cause delays; replication delay is due to network latency. Option D is incorrect because DynamoDB Streams are required for global tables to function; if they were disabled, replication would not occur at all, not just be delayed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Network latency between the regions is causing replication delay
Why this is correct
Global tables use asynchronous replication; inter-region latency adds propagation time.
- ✗
The write capacity in eu-west-1 is insufficient
Why it's wrong here
Write capacity in eu-west-1 affects writes to that region, not replication from us-east-1.
- ✗
Conflicts are being resolved due to concurrent writes
Why it's wrong here
Conflicts are resolved automatically but do not cause significant delays.
- ✗
DynamoDB Streams is disabled on the table
Why it's wrong here
Streams are required for global tables; if disabled, replication would stop.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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