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Microsoft Azure Interview Questions
Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. Azure Redis Cache is based on the popular open-source Redis cache. It gives you access to a secure, dedicated Redis cache, managed by Microsoft, and accessible from any application within Azure.  It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries.
When asked as the Azure cloud interview question you should answer it in the following way. There are various deployment models for the cloud :
* Private Cloud Deployment Model is one where you own the infrastructure and the cloud provider enables you to get the service exclusively.

* Public Cloud Deployment Model is one where you get the multi-tenant infrastructure from the service provider exclusively.

* Hybrid Cloud Deployment Model is a set up of intermixed public and private data in which the confidential data will be served in-house and the public directed website is there to address the public.
Messages are transferred to the DeadLetter queue in the following situation.
* When the delivery count has exceeded for a message that is on a queue.
* When the expiry date of the message has crossed and the entire expired message is held in a queue.
* When there is an evaluation exception set by default and the subscription is enabled with dead letter filter.
The prices vary in accordance with the product type. The various pricing models are : 
* The free model where our customers can avail the system exempted from the market fee.

* The BYOL scheme where the Azure is fetched the Azure with a fee that is not encircled around the limits of market price.

* The trial of the free software where the client gets the full version with an advanced feature for a limited period of time. With the expiration of the introductory period, you will be charged standard rates.

* Usage Based Fee that is billed in accordance with the service that you have taken. Like if you are subscribed for the virtual image then hourly fees may be charged.

* Monthly bills are activated if you sign a particular plan. The fee is not allocated for cancellation or mid-month unused service.
Azure AWS
Azure was launched in 2010, a few years after AWS It was launched in 2006
11-12% market share about 31% share in the market
Provides integration with all Microsoft tools and open source support, provides Hybrid cloud, contains a broad set of features Mature and extensive offerings with many features like monitoring, security, configuration, etc., open and flexible, has a better global reach
Compared to AWS, it is not so much enterprise-ready Too many options making it challenging to use; needs extensive cost management 
Follows on-demand pricing with per minute usage On-demand pricing on per hour basis
Maximum memory in VM is 3800 GB Maximum memory in VM is 3904 GB
Virtual servers are managed using virtual machines and scale sets Virtual servers are managed using Elastic Compute Cloud (EC2)
Docker container registry: Container registry  Docker container registry: using EC2 container registry
Blob storage Simple Storage Services (S3)
There are several benefits of enterprise warehousing :
Data integration : Centralized data placement ensures higher data availability and saving time and resources

Risk reduction : If data is messy and dirty, it may lead to many errors in interpretation and processing. Having clean, organized data can reduce risks and improve productivity.

Streamlined reporting : Data can be easily accessed and converted into reports with high accuracy

Better revenue and profits : Because of centralized storage, data entry and reporting can be automated, saving money and focusing more on business
Connected lookup Unconnected lookup
Can use static or dynamic cache Uses static cache
Input is directly received from a pipeline Input is received as a result of a :LKP expression in some other transformation
Provides support for user-defined values (default) No support for default user-defined values
If there are no matching results for the lookup condition, the service returns a default value A NULL value is returned if there is no match
Windows Azure has the following three principal segments :
Windows Azure Compute : It gives a code that can be managed by the hosting environment. It provides the benefit of calculation through parts. It consists of three types of roles - Web Role, Worker Role, and VM Role.

Windows Azure Storage : It gives four types of Storage services - Queue, Tables, Blobs, and Windows Azure Drives (VHD)

Windows Azure AppFabric : AppFabric provides five services - Service bus, Access, Caching, Integration, and Composite.
A storage key is an authentication method that can be used to validate access for the storage service account to control data based on our prerequisites. We have an alternative to give a primary access key and a secondary access key. The main reason for using a secondary access key is to avoid downtime to the application or website.
Microsoft Azure SQL database is a way to get associated with cloud services where we can store our database into the cloud. It has a similar component of SQL Server, i.e., high accessibility, versatility, and security in the core.