AWS - DynamoDB
You want to create a DynamoDB table with a composite primary key and enable auto scaling for read capacity. Which combination of parameters is correct?
You want to create a DynamoDB table with a composite primary key and enable auto scaling for read capacity. Which combination of parameters is correct?
hard📝 Best Practice Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand composite key and attribute definitions syntax
Attributes must be comma-separated; key schema must include HASH and RANGE keys.Step 2: Check auto scaling and billing mode
Auto scaling is configured separately; --auto-scaling-enabled is not a valid CLI parameter. Billing mode PROVISIONED is required for auto scaling.Step 3: Identify correct option
--attribute-definitions AttributeName=UserId,AttributeType=S,AttributeName=Timestamp,AttributeType=N --key-schema AttributeName=UserId,KeyType=HASH AttributeName=Timestamp,KeyType=RANGE --billing-mode PROVISIONED correctly formats attributes, key schema, and billing mode without invalid parameters.Final Answer:
Option C with correct attribute syntax and billing mode PROVISIONED -> Option CQuick Check:
Composite key + PROVISIONED billing = --attribute-definitions AttributeName=UserId,AttributeType=S,AttributeName=Timestamp,AttributeType=N --key-schema AttributeName=UserId,KeyType=HASH AttributeName=Timestamp,KeyType=RANGE --billing-mode PROVISIONED [OK]
Quick Trick: Use PROVISIONED billing for auto scaling; no --auto-scaling-enabled flag [OK]
Common Mistakes:
- Wrong attribute syntax
- Invalid auto scaling parameter
- Using PAY_PER_REQUEST with auto scaling
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