The need for Microsoft Azure certified professionals is at an all-time high among businesses, especially since Gartner has named it the second most sought-after profession.
This article compiles some frequently asked questions in job interviews for Microsoft Azure interviews. These questions can help both freshers and experienced candidates.
What is Azure?
Microsoft’s public cloud computing platform is called Azure. It offers numerous cloud services, including computing, analytics, storage, and networking. These services are available for users to choose from when creating and scaling new apps or using them to operate current applications in the public cloud.
Azure commands a market share of about 20% in the cloud computing sector.
80% of Fortune 500 firms currently rely on Azure to host their apps, resources, or other computing needs. Azure has developed into a leading service provider.
Cloud services in Azure can deliver multiple web applications, characterizing many pieces to distribute handling and enable flexible application growth. azure cloud services are capable of supporting
complicated multilayer systems
The 18 broad areas that comprise the computing services offered by Azure include networking, computing, storage, migration, IoT, analytics, containers, management and monitoring tools, developer tools, security, DevOps, etc.
Let us now look at some questions that will help professionals prepare for their Azure interview.
- What are the different cloud deployment models that are available?
When deploying to the cloud, one can choose from 3 models:
Public Cloud: In this approach, the cloud provider owns the cloud infrastructure on behalf of the general public, and many apps may share server resources.
Private Cloud: In this case, we exclusively own the cloud infrastructure or receive exclusive service from the cloud provider.
It includes hosting our apps on personal servers or hosting the application.
Hybrid Cloud: As the name implies, this architecture combines private and public clouds.
It might entail using public cloud capabilities to host apps with a shared front and processing sensitive data on-premises using on-premises servers. Here, we combine the finest of both worlds to meet our needs and gain.
- How many different cloud service roles does Azure offer?
Web role: This offers an Internet Information Services (IIS) dedicated web server for front-end websites to be hosted and automatically deployed.
Worker roles: These roles often don’t utilize IIS and assist the programs hosted within them running asynchronously for extended periods.
- They are independent of user interactions.
- They are perfect for running background operations.
- The programmes are conducted independently of one another.
Virtual machine role: Virtual machines are used to carry out both worker and web roles. The client can adjust the Azure Virtual Machine that houses the worker and web.
- What does Azure’s autoscaling mean?
The term “scaling out” is widely used to describe scaling by adding additional instances. As an alternative to using more role instances, Windows Azure also offers to scale up by using larger roles.
While our Windows Azure application is operating, we can modify its execution to balance its running expenses by adding and removing role instances.
The amount of manual work required to scale an application dynamically is decreased by using an auto-scaling solution.
- Describe Azure Resource Manager.
Azure’s Azure Resource Manager enables management and application deployment in Azure. The management layer makes building, altering, or deleting resources in the Azure subscription account easier. It helps control locks, access restrictions, and resource security.
- What choices do Azure’s deployment environments offer?
There are two environments for deployment:
Staging environment: This is where modifications to an application are tested before going live.
Production environment: Applications are launched in the production environment, where target consumers can access them using DNS-friendly URLs.
- What does an Azure role instance mean?
A role instance is a virtual machine where running role configurations are used to execute application code. The definition of a role in cloud service configuration files also permits multiple instances of a role.
- Describe Azure Fabric.
Azure Fabric is the primary concept of Microsoft Azure. It offers an Azure Fabric Controller service. It is referred to be the OS for Azure because it oversees the following:
- Every processing role and resource
- Activating and sending services
- keeping track of each service’s condition
- Resource allocation and release
- establishing a VM, ending it, etc.
- The most automatic method for updating patches for the installed OS on a virtual machine
- How does Azure Redis Cache work?
Azure offers and maintains an open-source, in-memory Redis cache technology. It helps web applications run better.
Azure Redis Cache works By retrieving data from the backend database and temporarily storing it in the Redis cache for the initial request and then retrieving data from the Redis cache for all subsequent requests.
Utilising the Azure cloud, Azure Redis Cache offers reliable and secure caching technologies.
- What would you do in case of a drive failure?
When a drive failure occurs, the following actions must be taken:
- We must ensure the drive is not mounted for Azure Storage to operate flawlessly.
- The drive should be changed so that it can be remounted and formatted.
- What kinds of storage services does Azure offer?
Azure offers four storage services: the Blob Service, Table Storage, Queue Storage, and File Storage Services.
Azure Blob Storage
Azure Blob Storage offers storage for the development of potent cloud-native and mobile apps while assisting you in the creation of data lakes for your analytics requirements.
It helps Reduce expenses for long-term data storage using tiering and flexibly scale up for workloads requiring high-performance computation and machine learning.
Vastly scalable and secure object storage for archives, data lakes, high-performance computing, and machine learning
It is the only cloud storage service offering a premium, SSD-based object storage tier for low-latency and interactive applications. It supports the most widely used development frameworks, including Java,.NET, Python, and Node.js.
Azure Table Storage
This storage enables users to install their applications using semi-structured data and a NoSQL key-value store.
It is utilised when applications that adhere to a flexible data structure are required.
Table Storage adheres to strongly consistent concepts and concentrates on enterprise-level data.
Entities arranged in tables are used to represent the data.
Azure Queue Storage
This storage enables users to create, construct, and implement flexible and modular applications, providing a message queue system for managing heavy workloads.
This storage guarantees that the application is scalable and less susceptible to the failure of individual components.
Message queues are used to give the queue monitoring capability, which helps the application ensure the users’ needs are met.
Azure File Storage:
SMB (Server Message Block) Protocol is used to utilise the file-sharing functionality offered by this storage type. SMB 3.0 Protocol and HTTPS are used to protect the data in this storage.
They are employed to enhance the functionality and performance of on-premise applications.
Azure itself is in charge of managing the hardware and OS instals.
11. Can you differentiate between Azure Table Storage and the Azure SQL service?
|Azure Table Storage||Azure SQL service|
|This adheres to a NoSQL style of Azure storage.||This adheres to Azure’s relational storage architecture.|
|The information is known as an entity and is kept in key-value format.||In the SQL table, the data is organised into a series of rows and columns.|
|For storage, the data schema is not required.||For storage, the data schema is not required.|
|It is impossible to connect the tables together.||Foreign keys are used to define relationships between tables.|
|For each entity, the partition and row key combination is considered to be unique.||The user can use a primary or unique key to define uniqueness.|
12. What is Azure Scheduler?
With the help of Azure Scheduler, we may execute particular background trigger events or activities, including calling HTTP/S endpoints or displaying a message on the queue at any time.
Utilising Azure Schedule, cloud-based jobs can call services available inside and outside Azure.
It starts the stated jobs at a later date that has been set or conducts those jobs on-demand that are periodically repeated.
13. What does Azure profiling entail?
Simply put, profiling is a method for determining an application’s performance analysis. Usually, this is done to ensure that the application can handle heavy traffic and is suitably steady.
By collecting the application’s performance data, Visual Studio provides us with various tools to do it, aiding in problem-solving.
When the profiling wizard launches, it creates the executive session and gathers the sample’s data.
The profiling reports are helpful for the following:
- Determining the application’s longest-running tactics
- Calculating the average call stack execution time for each technique
- Evaluating memory usage
14. What would occur if tone encountered the maximum amount of unsuccessful Azure ID login attempts?
In this instance, the protocol’s examination of the entered password and the IP address from which the login request was made will result in the locking of the Azure account.
15. What might make the client application disconnected from the cache?
There are two potential causes:
Possible redeployment of the application.
It’s possible that the application was merely scaling.
The networking layer on the client side has been modified.
There could be momentary issues with the client or the network connecting the client and the server.
Another cause can be that the bandwidth threshold constraints have been exceeded.
It could happen if the Azure Redis Cache service switches from the primary to the secondary node.
Some maintenance or patching may have been done to the server instance where the cache was installed.
16. Define scale sets for Azure virtual machines.
The Azure computation resources known as “scale sets” can be used to deploy and control groups of identical virtual machines (VMs).
These scale sets are similarly prepared and built to facilitate the autoscaling of the applications without the need for VM pre-provisioning.
They make it simpler to develop large-scale apps that target containerized loads and big data.
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17. What is a database in SQL Azure?
The SQL Azure database is simply a way of connecting to cloud services so your database can be stored there. When using PaaS, Microsoft Azure is the best option because it allows you to have several databases on the same account.
Microsoft SQL Azure has exceptional accessibility, adaptability, and security at its core, just like SQL Server.
All active databases have backups created automatically via the Microsoft Azure SQL Database feature.
18. What is Azure cspack?
It is a programme for creating service package files that run from the command line. Additionally, the tool assists in setting up the application for deployment in Microsoft Azure or a computing emulator.
Every project of the cloud service type contains a .cscfg file, which is essentially the file that configures the cloud service. It is created using the cspack programme and is mainly used to store:
- The number of instances for each role deployed in the project.
- The certificates’ thumbprint.
- Custom settings and configuration.
18. What Azure configuration will allow the code to run the best without a server?
Code can be run without a server using the Azure Functions service. Serverless Azure Functions are used to make complicated problem-solving and complex orchestration simpler. They are designed to be transient and without states.
They facilitate connections with other services without the requirement for integrations to be hard coded. This, in turn, accelerates the development cycle.
It facilitates the developer’s ability to focus on writing business logic code and thereby saves time and effort.
Additionally, they offer Azure Application Insights services for monitoring and evaluating code performance—this aids in finding inefficiencies and failure sources among the application’s various components.
19. What exactly are IaaS, PaaS, and SaaS?
IaaS: IaaS stands for Infrastructure as a Service. It offers a variety of infrastructure-level features, such as OS and network connectivity. It has a pay-per-use system. Applications are hosted on it.
Examples of this technology include Azure Virtual Machines and VNET.
PaaS: PaaS stands for a platform as a service. It mainly consists of underlying infrastructure abstraction, which enables quicker application development without the complexity of hosting administration.
Azure web apps, cloud services, storage services, etc., exemplify the PaaS model.
SaaS: SaaS stands for software as a service. An organisation employs apps in the service delivery paradigm used to supply these applications. A service delivery approach is utilised to provide these applications, in which an organisation merely uses the apps.
SaaS is financed through subscriptions or advertisements. Gmail, Office 365, SharePoint Online, and other services are examples of SaaS.
20. How do Fault Domains and Update Domains work?
Fault Domain: A fault domain is a logical grouping of the underlying gear that shares a singular power supply and network switch, much like a rack in an on-premises data centre.
As you build your VMs inside an availability set, the Azure platform automatically distributes them over several fault domains. This approach lessens the impact of any network disruptions, hardware faults, or power failures.
Update Domain: A logical grouping of the underlying hardware that can reboot or undergo maintenance simultaneously is referred to as an update domain. When you build your virtual machines within an availability set, the Azure platform automatically distributes them among these updated domains.
With this strategy, you can be sure that while the Azure platform is undergoing routine maintenance, at least one instance of your application will always be active.
Only one update domain is rebooted at a time during planned maintenance, although the order in which they restart may be different.
The rapid expansion of Azure has paved the way for numerous enterprises by opening up a wide range of opportunities in both the technical and non-technical fields, making it a very valuable field to pursue a career in. The above Interview Questions for Azure should help you get an understanding of potential questions and the knowledge you need to answer them.