Top 50 Azure Interview Questions and Answers For 2020
1. What is Cloud Computing?
Cloud computing is a term referred to storing and accessing data over the internet. It doesn’t store any data on the hard disk of your personal computer. In cloud computing, you are allowed accessing data from a remote server.
2. What is Microsoft Azure?
Azure is a cloud computing platform which was launched by Microsoft in Feb 2010. It is a highly flexible cloud platform that offers development, data storage, service hosting, and service management.
3. Explain the Importance of the role and how many types of roles are available in Windows Azure?
Roles are a very important concept in Windows Azure, and learning them is the base for further programming.
Three types of roles in Windows Azure are:
- Web Role: It is used to deploy website by using langue which is supported by the IIS platform customized to run the web apps.
- Worker Role: It helps you to execute the process that runs in the background by
- VM Role: It helps you to schedule the windows services and task.
4. What are the roles implemented in Windows Azure?
There are three roles in Windows Azure:
- Web Role
• Worker Role
• Virtual Machine Role
Web Role: It gives a web solution that is front-end. This is like an ASP.NET application. While under facilitating, Azure gives IIS and required services.
Worker Role: It gives solutions for background service. It can run long activities.
Virtual Machine Role: The roles of both web and worker are executed on virtual machines. The Virtual Machine Roles give the client the capacity to modify the virtual machine on which the web and worker roles are running.
5. Define Windows Azure AppFabric.
Windows Azure Diagnostics empowers you to gather diagnostic data from an application running in Windows Azure. Diagnostic data is used for capacity planning and evaluation.
6. What is the distinction between Windows Azure Queues and Windows Azure Service Bus Queues?
Azure Queues give a solid, diligent messaging between and within the services. They also highlight a very straightforward rest-based get/put/peek interface.
Bus Queues are part of a more extensive Windows Azure messaging framework that supports queuing.
7. What is table storage in Windows Azure?
Windows Azure Table storage service stores a lot of organized information. Windows Azure tables are perfect for putting away organized, non-relational data.
Table: A table is a collection of entities. Tables don’t uphold a blueprint on elements, which implies that a solitary table can contain substances that have distinctive arrangements of properties. A record can contain numerous tables.
Entity: An entity is an arrangement of properties, like a database row. An entity can be up to 1 MB in size.
Properties: A property is a name–value pair. Every entity can incorporate up to 252 properties to store data. Every entity likewise has three system properties that determine a segment key, a row key, and a timestamp.
8. What is autoscaling in Azure?
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.
9. What are the features of Windows Azure?
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.
• 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.
10. What are virtual machine scale sets in Azure?
Explanation: 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.
11. Are data disks supported within scale sets?
Explanation: 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)
12. What is an Availability Set?
Explanation: An availability set is a logical grouping of VMs that allows Azure to understand how your application is built to provide redundancy and availability. It is recommended that two or more VMs are created within an availability set to provide for a highly available application and to meet the 99.95% Azure SLA. When a single VM is used with Azure Premium Storage, the Azure SLA applies for unplanned maintenance events.
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13. What are Fault Domains?
Explanation: 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.
14. What are Update Domains?
Explanation: 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.
15. What is a break-fix issue?
Explanation: Technical problems are called break-fix issue; it is an industry term which refers to “work involved in supporting a technology when it fails in the normal course of its function, which requires intervention by a support organization to be restored to working order”.
16. Why is Azure Active Directory used?
Explanation: Azure Active Directory is an Identity and Access Management system. It is used to grant access to your employees to specific products and services in your network. For example: Salesforce.com, twitter etc. Azure AD has some in-built support for applications in its gallery which can be added directly.
17. What happens when you exhaust the maximum failed attempts for authenticating yourself via Azure AD?
Explanation: We use a more sophisticated strategy to lock accounts. This is based on the IP address of the request and the passwords entered. The duration of the lockout also increases based on the likelihood that it is an attack.
18) What is a web role?
A web role provides a dedicated Internet Information Services (IIS) web-server used for hosting front-end web applications.
19) What is a worker role?
Applications hosted within worker roles can run asynchronous, long-running or perpetual tasks independent of user interaction or input.
20) What is a role instance?
A role instance is a virtual machine on which the application code and role configuration run. A role can have multiple instances, defined in the service configuration file.
21) What is a guest operating system?
The guest operating system for a cloud service is the operating system installed on the role instances (virtual machines) on which your application code runs.
22) What is a cloud service component?
Three components are required in order to deploy an application as a cloud service in Azure.
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