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A DAX client throws an error when trying to connect. Which is the most probable cause?

medium📝 Debug Q7 of 15
DynamoDB - Cost Optimization and Monitoring
A DAX client throws an error when trying to connect. Which is the most probable cause?
AThe client is using the wrong AWS region for DynamoDB
BThe DynamoDB table is empty
CThe IAM user lacks permission to read from DynamoDB
DThe DAX cluster is not running or unreachable
Step-by-Step Solution
Solution:

  1. Step 1: Analyze connection error causes

    Connection errors usually mean the DAX cluster is down or network unreachable.

  2. Step 2: Evaluate other options

    Empty tables or wrong region for DynamoDB do not cause DAX connection errors; IAM permissions cause access errors, not connection failures.

  3. Final Answer:

    The DAX cluster is not running or unreachable -> Option D

  4. Quick Check:

    Connection error = cluster unreachable [OK]
Quick Trick: Check DAX cluster status if client connection fails [OK]
Common Mistakes:
MISTAKES
  • Blaming empty tables for connection errors
  • Confusing DynamoDB region with DAX cluster region
  • Assuming permission errors cause connection failures

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