Integrate Azure Managed Redis in AI Solutions AI-200 Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A healthcare app caches patient records in Azure Managed Redis. The app must comply with data residency requirements, so all data must remain in the same Azure region. The team is designing a cache invalidation strategy for when patient records are updated. Which approach best meets the compliance and consistency requirements?

   • AUse a regional Redis instance and publish invalidation messages via pub/sub within the same region.
   • BUse a globally distributed Redis with active geo-replication to replicate data across regions.
   • CUse a central cache in a different region and rely on VPN connectivity.
   • DUse a TTL-based invalidation with a short TTL to avoid cross-region messaging.
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2. 17application · medium

   A multi-tenant SaaS application uses Azure Managed Redis to cache tenant-specific configuration. When a tenant updates its configuration, all cached copies must be invalidated across the application's multiple instances. Which pattern should you use?

   • AHave each instance poll the database for configuration changes every minute.
   • BSet a short TTL on all configuration keys and accept eventual consistency.
   • CUse Redis pub/sub to broadcast an invalidation message to all instances.
   • DUse a distributed lock to prevent reads during configuration updates.
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4. 18application · medium

   A blog platform caches post content in Azure Managed Redis. When an author edits a post, the change must be visible immediately. The team uses a cache-aside pattern. Which action should the application take after a successful database update?

   • ADo nothing and rely on the existing expiration policy.
   • BSet a short expiration on the cache key, such as 30 seconds.
   • CDelete the corresponding cache key.
   • DUpdate the cache key with the new post content.
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5. 19foundation · easy

   What happens to a key in Azure Managed Redis when its time-to-live (TTL) expires?

   • AThe key is marked as expired but remains accessible until manually removed.
   • BThe key is automatically deleted from the cache.
   • CThe key is moved to a backup storage account.
   • DThe key's value is reset to its default value.
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6. 20application · medium

   A mobile app uses Azure Managed Redis to cache user session tokens. Each token is valid for 2 hours. The security team requires that a token cannot be used after it expires. The app currently stores tokens with a key like 'session:<user-id>' and sets no expiration. What should the development team do to enforce the 2-hour limit?

   • AUse the TTL command to check the remaining time and delete the key when it reaches zero.
   • BUse the PERSIST command on each session key to prevent eviction.
   • CUse the EXPIRE command with a time of 120 seconds on each session key.
   • DUse the SET command with the EX 7200 option when storing each session token.
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