Top 35 Azure Interview Questions and Answers
by Sathish, on Jun 30, 2021 4:26:55 PM
Basic Azure Interview Questions and Answers
1.What is Microsoft Azure and why is it used?
Ans: As discussed above, the companies which provide the cloud service are called the Cloud Providers. There are a lot of cloud providers out there, out of them one is Microsoft Azure. It is used for accessing Microsoft’s infrastructure for cloud.
2.How Does Microsoft Azure Compare to Aws?
Ans: This might be a matter of opinion for you, so answer as you see fit. In general, people say Azure is a better choice because it’s a Microsoft product, making it easier for organizations already using Windows Server, SQL Server, and Exchange to move to the cloud. In addition, because of Microsoft’s deep knowledge of developer tools, Azure offers multiple app deployment options for developers, which makes it stand out against AWS.
3. What are the different cloud deployment models?
Ans: Following are the three cloud deployment models:
Public Cloud: The infrastructure is owned by your cloud provider and the server that you are using could be a multi-tenant system.
Private Cloud: The infrastructure is owned by you or your cloud provider gives you that service exclusively. For eg: Hosting your website on your servers, or hosting your website with the cloud provider on a dedicated server.
Hybrid Cloud: When you use both Public Cloud, Private Cloud together, it is called Hybrid Cloud. For Example: Using your in-house servers for confidential data, and the public cloud for hosting your company’s public facing website. This type of setup would be a hybrid cloud.
4.What is cloud computing?
Ans: It is the use of servers on the internet to “store”, “manage” and “process” data. The difference is, instead of using your own servers, you are using someone else’s servers to do your task, paying them for the amount of time you use it for.
5.What is the scalability of cloud computing?
Ans: If the above question appears as the Azure cloud interview questions your most appropriate answer will be scaling is one of the advantages that are of two types;
- Vertical scaling, where the configuration yields to increase the existing capacity of the machine. Just like expanding the size of the RAM from 4GB to 32GB.
- Horizontal Scaling, an aspect where the physical aspect is increased like putting multiple machines at work instead of replacing the existing machine.
6. What are the advantages of cloud computing?
Ans: There are several advantages of cloud computing which are as follows;
- The versatility of the system can be altered if the business requires certain modification.
- They are highly available which increases its end users to get benefited by every inch.
- The system is capable of tolerating fault of a single part and overcomes it by remaining completely functional.
- The service allows you to pay only when the system is in use. You can easily reallocate the system when you use them and get saved from the charge.
- The system has brought into light the payment for the operation rather than the investment in the machines.
7. What is meant by PaaS, SaaS, and IaaS?
Ans: These are the basic terms while dealing with the cloud services and are commonly asked in an Azure interview:
- PaaS stands for Platform as a Service that enables you to get a platform to deliver without directly giving authorization to the OS software.
- SaaS stands for Software as a Service is devoid of platform infrastructure software that can be used without direct purchase.
- IaaS stands for Infrastructure as a Service which enables you to get the hardware from the provider as the desired service which can be configured by the user.
8.What is the difference between SaaS, PaaS, and IaaS?
Ans: This is one of the most common Azure interview questions. Cloud Computing has three types of service models, that are IaaS, PaaS, and SaaS
Infrastructure as a Service(IaaS)
Platform as a Service(PaaS)
Software as a Service(SaaS)
It provides users with components such as OS, networking capabilities, etc. This is a paid service, based on usage and can be used to host applications.
It enables developers to build and work with applications without having to worry about the infrastructure or management of the hosting environment.
It involves applications being consumed and used by organizations. Usually, organizations pay for their use of the application
Example - Azure Virtual Machine, Azure VNET
Example - Azure SQL, Azure Storage
Example - Office 365, Salesforce
9. What are the main functions of the Azure Cloud Service?
Ans: The main functions of the Azure Cloud Service are;
- It is designed to host the running application and at the same time manage the background running application.
- The application of web processing is termed as “web role” whereas the background processing is termed as the “worker role”.
10.Which of the following web applications can be deployed with Azure?
- All of the mentioned
Ans: D All of the mentioned
Explanation: Microsoft also has released SDKs for both Java and Ruby to allow applications written in those languages to place calls to the Azure Service Platform API to the AppFabric Service.
11.Differentiate between Microsoft Azure and AWS.
|Features||Microsoft Azure||Amazon Web Services (AWS)|
|Analytics||Azure Stream Analytics||Amazon Kinesis|
|Backup Options||Azure Backup||Amazon Glacier|
|Compliance||Azure Trust Center||AWS CLoudHSM|
|Content Delivery Network (CDN)||Azure CDN||Amazon CloudFront|
|Data Orchestration||Azure Data Factory||AWS Data Pipeline|
|Hybrid Cloud Storage||StorSimple||AWS Storage Gateway|
|Monitoring||Azure Operational Insights||Amazon CloudTrail|
|NoSQL Database Options||Azure DocumentDB||Amazon DynamoDB|
12.What is the link to a resource?
Ans: To show your cloud service’s dependencies on other resources, such as an Azure SQL Database instance, you can “link” the resource to the cloud service. In the Preview Management Portal, you can view linked resources on the Linked Resources page, view their status on the dashboard, and scale a linked SQL Database instance along with the service roles on the Scale page. Linking a resource in this sense does not connect the resource to the application; you must configure the connections in the application code.
13.What is Azure Portal?
Ans: Azure Portal is a single portal or a single place where you are accessing and managing all your applications. It helps to build, manage, and monitor your simple web-applications to complex cloud applications using a single portal. To know more about this, you can refer to An Introduction to Microsoft Azure Portal.
14.What are the web applications can be deployed with Azure?
Ans: Different web applications like .Net, PHP, WCF, Java, etc are supported in Azure. Multiple languages are supported in Azure.
15.Which service in Azure is used to manage resources in Azure?
- Application Insights
- Azure Resource Manager
- Azure Portal
- Log Analytics
Ans: B Azure Resource Manager
Explanation: Azure Resource Manager is used to “manage” infrastructures which involve a no. of azure services. It can be used to deploy, manage and delete all the resources together using a simple JSON script.
Azure Interview Questions and Answers
16.What are Roles and why do we use them?
Ans: Roles are nothing servers in layman terms. These servers are managed, load balanced, Platform as a Service virtual machines that work together to achieve a common goal.
There are 3 types of roles in Microsoft Azure:
- Web Role
- Worker Role
- VM Role
Let’s discuss each of these roles in detail:
- Web Role – A web role is basically used to deploy a website, using languages supported by the IIS platform like, PHP, .NET etc. It is configured and customized to run web applications.
- Worker Role – A worker role is more like an help to the Web role, it used to execute background processes unlike the Web Role which is used to deploy the website.
- VM Role – The VM role is used by a user to schedule tasks and other windows services. This role can be used to customize the machines on which the web and worker role is running.
17.What do you mean by roles?
Ans: This is another basic yet important question asked as the Azure Interview Questions which should be answered in the following way:
Roles in cloud management are often termed to be nothing servers that are linked to managing and balancing the platform as service machine that collaborates works to attain the goal.
18.What are virtual machine scale sets in Azure?
Ans: Virtual machine scale sets are Azure compute resource that you can use to deploy and manage a set of identical VMs. With all the VMs configured the same, scale sets are designed to support true autoscale, and no pre-provisioning of VMs is required. So it’s easier to build large-scale services that target big compute, big data, and containerized workloads.
19. Are data disks supported within scale sets?
Ans: Yes. A scale set can define an attached data disk configuration that applies to all VMs in the set. Other options for storing data include:
- Azure files (SMB shared drives)
- OS drive
- Temp drive (local, not backed by Azure Storage)
- Azure data service (for example, Azure tables, Azure blobs)
- External data service (for example, remote database)
20.What do you mean by a domain?
Ans: This is one of the common Azure Interview Questions that may be asked which should be answered as follows the interconnected and interlinked nodes that are often a measure undertaken by the organization is known as the domain. These relations are carried by only one point of the organization.
21.What are Fault Domains?
Ans: A fault domain is a logical group of underlying hardware that share a common power source and network switch, similar to a rack within an on-premise data-centers. As you create VMs within an availability set, the Azure platform automatically distributes your VMs across these fault domains. This approach limits the impact of potential physical hardware failures, network outages, or power interruptions.
22. What are Update Domains?
Ans: An update domain is a logical group of underlying hardware that can undergo maintenance or can be rebooted at the same time. As you create VMs within an availability set, the Azure platform automatically distributes your VMs across these update domains. This approach ensures that at least one instance of your application always remains running as the Azure platform undergoes periodic maintenance. The order of update domains being rebooted may not proceed sequentially during planned maintenance, but only one update domain is rebooted at a time.
23. What are Network Security Groups?
Ans: A network security group (NSG) contains a list of Access Control List (ACL) rules that allow or deny network traffic to subnets, NICs, or both. NSGs can be associated with either subnets or individual NICs connected to a subnet. When an NSG is associated with a subnet, the ACL rules apply to all the VMs in that subnet. In addition, traffic to an individual NIC can be restricted by associating an NSG directly to a NIC.
24.What is autoscaling in Azure?
Ans: Scaling by including extra instances is frequently referred to as scaling out. Windows Azure likewise supports scaling up by utilizing bigger role rather than more role instances.
By adding and expelling role instances to our Windows Azure application while it is running, we can adjust the execution of the application against its running costs.
An autoscaling solution reduces the amount of manual work engaged in dynamically scaling an application.
25. What are the features of Windows Azure?
Ans: Windows Azure runs and stores the information on Microsoft data centers.
The main features are as follows:
- Websites enable the designers to assemble the sites utilizing ASP.NET, PHP, etc., and send these websites utilizing FTP, Git, etc.
- SQL database, formally known as Azure database, makes, broadens, and scales the application into the cloud utilizing Microsoft SQL Server.
- This is Microsoft’s Platform as a Service that supports multilevel applications and automated deployment.
26.What is table storage in Windows Azure?
- The Azure Table storage allows us to store structured data. It stores NoSQL data.
- Azure Table storage service allows storing structured, non-relational data.
- The main advantage of using table storage is, it is fast and cost-effective for many types of applications.
- You can store any number of entities in the table.
- You can use table storage to store datasets that don’t require complex joins or stored procedures.
27.What is Queue storage in Windows Azure?
Ans: Azure Queue storage is a type of Azure storage that can store large numbers of messages that can be accessed from anywhere in the world using HTTP or HTTPS protocols.
28.What do you mean by a BLOB storage and what are their types?
Ans: Azure Blob storage allows storing unstructured data. We can store huge data like text files, images, audios, and videos, media files, or application installers, etc.
These blob storage data can be accessed from any place via protocols like HTTP or HTTPS.
The Blob storage is of three types
- Block Blobs storage: Contains small blocks with unique IDS.
- Append Blobs storage: In this case, we cannot update or delete any of the existing blocks
- Page Blobs storage: The max size of a page blob is 8 TB.
29.What are the two kinds of Azure Web Service roles?
Ans: A cloud service role is a set of managed and load-balanced virtual machines that work together to perform tasks. The two kinds of Azure Web Service roles are:
- It is a cloud service role that is used to run web applications developed in programming languages supported by IIS (Internet Information Services) like ASP.NET, PHP, etc.
- It automatically deploys and hosts applications through the users IIS
- It runs applications and other tasks that don't require IIS. It performs supporting background tasks along with web roles
- It doesn’t use IIS and runs user applications standalone
30. What is Azure Service Fabric?
Ans: Service Fabric provides a platform that makes the process of developing microservices and managing the application lifecycle easier.
- It produces applications with a faster time to market
- It supports Windows/ Linux, on-premises or other clouds
- It provides the ability to scale up to a thousand machine
31.What is Azure Service Level Agreement (SLA)?
Ans: The SLA ensures that, when you send two or more role instances for each role, access to your cloud service will be maintained not less than 99.95 percent of the time. Additionally, identification and re-correction activities will be started 99.9 percent of the time when a role instance’s procedure isn’t running.
32.What is Migration Assistant tool in Azure Websites?
Ans: Migration Assistant tool will examine our IIS installation and recognize the sites that can be migrated to the cloud, featuring any components which can’t be migrated or are unsupported on the platform.
Once broken down, this tool will likewise create sites and databases provided under the given Azure membership.
33.What is the difference between Service Bus Queues and Storage Queues?
Ans: Service Bus Queues is a terminology where a sender delivers a message to a Queue that is used to reside in a Service Bus Namespace, later the receiver receives that message.
Azure Queue storage is a type of storage that can store large numbers of messages that can be accessed from anywhere in the world using HTTP or HTTPS protocols.
This is like FIFO (First in First out) implementation, messages will add to the end of the queue. The size of a queue message can be up to 64 KB.
34.What is Text Analytics API in Azure Machine?
Ans: Content Analytics API is a part of content examination web administrations worked with Azure Machine Learning. The API can be utilized to analyze unstructured content for tasks such as sentiment analysis and key-phrase extraction.
The API restores a numeric score between 0 and 1. Scores near 1 show positive sentiment, while scores near 0 demonstrate negative sentiment.
The upside of this API is that another new model need not be planned and prepared; the user just needs to bring the data and call the service to get the sentiment results.
35.What is Azure Redis Cache?
Ans: 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.
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36.What is cmdlet in Azure?
Ans: A cmdlet is a lightweight command that is utilized as a part of the Microsoft PowerShell environment. The cmdlets are summoned by the Windows PowerShell to automate the scripts which are in the command line. Windows PowerShell runtime additionally invokes them automatically through Windows PowerShell APIs.