Azure Cache for Redis - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ service_behavior

intermediate

How does Azure Cache for Redis handle data persistence?

Azure Cache for Redis offers different persistence options. Which of the following best describes how data persistence works in Azure Cache for Redis?

A Persistence is disabled by default and can be enabled to save snapshots to Azure Storage at configured intervals.

B Data is automatically saved to disk every second without any configuration.

C Data is stored permanently in Azure Blob Storage and Redis only caches it temporarily.

D Azure Cache for Redis does not support any form of data persistence.

💡 Hint

Think about whether persistence is on by default or requires setup.

Azure Cache for Redis persistence is disabled by default. You can enable it to save snapshots of your cache data to Azure Storage at intervals you configure. This helps recover data after a restart.

❓ Architecture

intermediate

Choosing the right Azure Cache for Redis tier for high availability

You need a Redis cache that supports automatic failover and data replication across multiple nodes. Which Azure Cache for Redis tier should you choose?

A Free tier

B Standard tier

C Basic tier

D Premium tier

💡 Hint

Consider which tier supports clustering and geo-replication.

The Premium tier supports clustering, data replication, and automatic failover, making it suitable for high availability scenarios.

❓ security

advanced

Securing Azure Cache for Redis access

You want to restrict access to your Azure Cache for Redis instance so only your Azure App Service can connect. Which method provides the most secure and recommended way to achieve this?

A Use Azure Private Link to connect the App Service privately to the Redis cache.

B Use the Redis access keys and share them with the App Service.

C Enable firewall rules to allow only the App Service outbound IP addresses.

D Disable authentication on the Redis cache to simplify access.

💡 Hint

Think about private network connectivity versus just IP filtering.

Azure Private Link allows private, secure network connectivity between your App Service and Redis cache, avoiding exposure over the public internet.

❓ Configuration

advanced

Configuring Redis cache for geo-replication

You want to configure geo-replication between two Azure Cache for Redis instances in different regions. Which statement is true about this setup?

A Geo-replication is supported only in the Basic tier and requires manual synchronization.

B Geo-replication is not supported by Azure Cache for Redis.

C Geo-replication requires Premium tier caches and uses a primary-secondary replication model.

D Geo-replication is automatic in all tiers and requires no configuration.

💡 Hint

Check which tier supports geo-replication and how it works.

Geo-replication is a Premium tier feature that links a primary cache with one or more secondary caches in different regions for disaster recovery.

✅ Best Practice

expert

Optimizing Azure Cache for Redis for high throughput and low latency

You have a high-traffic web application using Azure Cache for Redis. Which combination of configurations will best optimize throughput and latency?

A Use Basic tier with a single node and enable persistence.

B Use Premium tier with clustering enabled and configure client-side connection pooling.

C Use Standard tier with multiple caches and disable SSL to reduce overhead.

D Use Premium tier without clustering and increase the cache size beyond needed.

💡 Hint

Think about clustering and client connection management.

Premium tier clustering allows sharding data across multiple nodes, improving throughput. Client-side connection pooling reduces connection overhead and latency.