AWS - DynamoDB
Which AWS DynamoDB operation is faster when you know the exact primary key of the item you want to retrieve?
Which AWS DynamoDB operation is faster when you know the exact primary key of the item you want to retrieve?
easy📝 Conceptual Q11 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Query operation
Query retrieves items by specifying the primary key, making it fast and efficient.Step 2: Compare with Scan operation
Scan reads the entire table, which is slower and more costly when you know the key.Final Answer:
Query -> Option CQuick Check:
Known key = Query [OK]
Quick Trick: Use Query for known keys, Scan reads all data [OK]
Common Mistakes:
- Thinking Scan is faster for known keys
- Confusing Update or Delete with data retrieval
- Assuming Query reads the whole table
Master "DynamoDB" in AWS
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