Practice Test
Caching is a process that involves the temporary storage of frequently accessed or recently accessed data.
- A) True
- B) False
Answer: A) True
Explanation: Caching stores data temporarily to allow quick access upon request. It is often implemented to optimize the performance of a system.
Which of the following Azure service is used to cache and deliver content at high speed to users?
- A) Azure Kubernetes Service
- B) Azure Content Delivery Network (CDN)
- C) Azure Data Factory
- D) Azure Logic Apps
Answer: B) Azure Content Delivery Network (CDN)
Explanation: Azure CDN is a solution for caching and delivering content at high speed to users.
Azure Redis Cache is a powerful caching service that increases the application performance by reducing the load on the database.
- A) True
- B) False
Answer: A) True
Explanation: Azure Redis Cache enhances application performance by reducing load on the database as it provides high speed access to cached data.
Azure Redis Cache runs on a single-tenant infrastructure.
- A) True
- B) False
Answer: B) False
Explanation: Azure Redis Cache runs on a multi-tenant infrastructure that provides shared resources among multiple users.
Disk caching is appropriate for applications that require high speed and low latency data transactions.
- A) True
- B) False
Answer: A) True
Explanation: Disk caching can provide quick access to frequently used data and is suitable for applications that demand high speed and low latency transactions.
Which of the following is NOT a caching solution provided by Azure?
- A) SQL Database In-memory OLTP
- B) Azure Page Blobs
- C) Azure Table Storage
- D) Azure Redis Cache
Answer: C) Azure Table Storage
Explanation: Azure Table Storage is not a caching solution. It is a service that stores structured NoSQL data in the cloud.
It is always better to cache all data in an application for improved performance.
- A) True
- B) False
Answer: B) False
Explanation: Caching all data can lead to storage issues and cache invalidation problems. It is important to only cache frequently or recently accessed data.
Azure Cache for Redis is fully managed by Microsoft.
- A) True
- B) False
Answer: A) True
Explanation: Azure Cache for Redis is fully managed by Microsoft and requires minimal configuration and maintenance.
Which of the following Azure services is predominantly used for disk caching?
- A) Azure Disk Storage
- B) Azure Blob Storage
- C) Azure Files
- D) Azure Queue Storage
Answer: A) Azure Disk Storage
Explanation: Azure Disk Storage provides high-performance, durable block storage for Azure Virtual Machines and is typically used for disk caching.
Caching solutions are only applicable for cloud-based applications.
- A) True
- B) False
Answer: B) False
Explanation: Caching solutions can be implemented in both cloud and non-cloud environments to improve the performance of an application.
In-memory caching is slower than disk caching.
- A) True
- B) False
Answer: B) False
Explanation: In-memory caching is generally faster than disk caching as it involves storing data in the RAM, which is quicker to access than disk storage.
Azure Cache for Redis supports critical workloads of large-scale applications.
- A) True
- B) False
Answer: A) True
Explanation: Azure Cache for Redis provides high throughput and low-latency data access to power fast, scalable applications.
Azure Content Delivery Network (CDN) is used for caching static content.
- A) True
- B) False
Answer: A) True
Explanation: Azure CDN stores cached static content closer to users to ensure high-speed delivery.
Azure Redis Cache requires a third-party client library for access.
- A) True
- B) False
Answer: B) False
Explanation: While Redis Cache does support third-party client libraries, it is not a requirement. Redis Cache provides native data structures for direct access as well.
Caching solutions should be the primary storage for important data.
- A) True
- B) False
Answer: B) False
Explanation: Caching is not a form of primary data storage and is not a reliable means of data preservation. It is only meant to temporarily store data to speed up data access.
Interview Questions
What is a caching solution in Azure?
Azure provides a host of caching solutions to enhance the performance of applications by reducing the load on databases. They store a version of data in fast access hardware to provide quicker access times.
What is Azure Redis Cache?
Azure Redis Cache is a fully managed, secure and highly available in-memory caching service from Microsoft. It can significantly boost application performance and simplify the scalability process.
In what scenarios would you recommend using Azure Redis Cache?
Azure Redis Cache would be recommended in scenarios where applications require extremely fast data access, need to handle large volumes of data transactions, or require real-time processing.
What is Azure CDN caching?
Azure Content Delivery Network (CDN) caching service provides a global distribution network for delivering high-bandwidth content that is cached close to users to increase speed and reduce latency.
When should Azure CDN caching be used?
Azure CDN caching should be used when applications serve large amounts of static, unchanging content like HTML pages, images, and Javascript files, to a worldwide audience.
What is the Azure Cache for Redis?
Azure Cache for Redis provides an in-memory data store based on open-source Redis. It improves the performance and scalability of an application when used as a cache or a message broker.
How can you enhance the security of Azure Redis Cache?
Using Azure Private Link, you can secure Azure Cache for Redis by accessing it through your Azure Virtual Network (VNet) and by using Redis authentication and SSL connections.
Why is caching important in Cloud applications?
Caching in cloud applications reduces the load on databases and improves application performance. It provides quicker data access by storing a copy of data in high-speed access hardware.
Can Azure Cache for Redis be used for session state caching?
Yes, Azure Cache for Redis is an excellent choice for session state caching as it can store and retrieve user session data quickly, allowing swift user interactivity.
How to choose the right Azure caching solution?
The choice depends on the use case. If the application is serving a lot of video or image content worldwide then Azure CDN is a good option. If the application needs extremely fast data access, Azure Redis Cache is suitable.
How can you scale Azure Redis Cache?
Azure Redis Cache can be scaled up by selecting a larger cache size in the Azure portal. It also supports data partitioning through Redis clustering for high throughput scenarios.
Can Azure Cache for Redis become a single point of failure?
To avoid single points of failure, Azure Cache for Redis provides high availability and persistence features, like replication and point-in-time data restoration.
Does Azure Redis Cache support replication?
Yes, Azure Redis Cache supports data replication across two nodes in a primary/secondary configuration and the replication is managed automatically.
What is the best practice for caching static content in Azure?
The best practice for caching static content in Azure is to use the Azure Content Delivery Network (CDN) which caches static content closer to users at strategic locations, globally.
Can Azure Redis Cache serve as a database?
While Azure Redis Cache could technically be used as a simple database, it is typically not recommended to be used as the primary datastore because of the ephemeral nature of data in cache. It is best suited to cache data for quick access.
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