Recall & Review
beginner
What does TTL stand for in DynamoDB?
TTL stands for Time To Live. It is a feature that automatically deletes expired items from a DynamoDB table.
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beginner
How is TTL useful for managing user sessions?
TTL automatically removes expired session data, helping keep the database clean and ensuring users' sessions do not persist longer than intended.
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beginner
Why is TTL helpful for log data in DynamoDB?
Logs can grow very large. TTL deletes old logs automatically after a set time, saving storage space and reducing costs.
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beginner
Explain how TTL supports cache management in DynamoDB.
TTL removes cached items after they expire, ensuring the cache stays fresh and does not serve outdated data.
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beginner
What happens to an item in DynamoDB when its TTL expires?
When an item's TTL expires, DynamoDB automatically deletes the item without user intervention.
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What is the main purpose of TTL in DynamoDB?
✗ Incorrect
TTL automatically deletes items after their expiration time to keep the table clean.
Which use case benefits from TTL by removing old session data?
✗ Incorrect
TTL helps remove expired user sessions automatically.
How does TTL help with log data in DynamoDB?
✗ Incorrect
TTL deletes old logs after a set time to save space.
What happens to cached items when their TTL expires?
✗ Incorrect
TTL deletes cached items after expiration to keep cache fresh.
TTL in DynamoDB requires which of the following to work?
✗ Incorrect
TTL uses a timestamp attribute to know when to delete items.
Describe three common use cases for TTL in DynamoDB and explain why TTL is helpful for each.
Think about data that only needs to exist temporarily.
You got /3 concepts.
Explain how TTL works in DynamoDB and what happens when an item's TTL expires.
Focus on the automatic deletion process.
You got /3 concepts.