AWS - DynamoDB
You want to create a DynamoDB table with a partition key named 'SessionId' of type string and a sort key named 'CreatedAt' of type number. Which JSON snippet correctly defines the key schema and attribute definitions?
Which JSON snippet correctly defines the key schema and attribute definitions?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Match attribute types to keys
Partition key 'SessionId' is string (S), sort key 'CreatedAt' is number (N).Step 2: Verify key schema order
Partition key must be HASH, sort key must be RANGE in correct order.Final Answer:
JSON with SessionId as HASH string and CreatedAt as RANGE number -> Option AQuick Check:
Correct attribute and key types = {\"AttributeDefinitions\": [{\"AttributeName\": \"SessionId\", \"AttributeType\": \"S\"}, {\"AttributeName\": \"CreatedAt\", \"AttributeType\": \"N\"}], \"KeySchema\": [{\"AttributeName\": \"SessionId\", \"KeyType\": \"HASH\"}, {\"AttributeName\": \"CreatedAt\", \"KeyType\": \"RANGE\"}]} [OK]
Quick Trick: Partition key = HASH, sort key = RANGE with matching types [OK]
Common Mistakes:
- Swapping HASH and RANGE keys
- Mismatching attribute types
- Omitting sort key
Master "DynamoDB" in AWS
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore AWS Quizzes