IIS Interview Questions & Answers


Q: – What is the Role of IIS ?

Visual studio having It own ASP.NET Engine which is capable enough to run Asp.net web application from visual studio. So we just click on Run button to start the application.Now this is the scenarios of local environment. But If we want to host it on server from where all user can access the sites then IIS comes into the picture. IIS provides a redesigned WWW architecture that can help you achieve better performance, reliability, scalability, and security for our Web sites. IIS can support following Protocol HTTP/HTTPS, FTP, FTPS, SMTP Etc. We need to host the site on IIS, when request comes from client it first hits the IIS Server, then the server passed it to ASP.NET worker process to execute. Then the response also passes to client via IIS itself.Note only Hosting of Site we can create our FTP Server, SMTP Server using IIS itself.There are different version of IIS available like 5.1, 6.0, 7.0 etc

Q: – What is Application Pool in IIS ?

Application pools are used to separate sets of IIS worker processes that share the same configuration and application boundaries. Application pools used to isolate our web application for better security, reliability, and availability and performance and keep running with out impacting each other . The worker process serves as the process boundary that separates each application pool so that when one worker process or application is having an issue or recycles, other applications or worker processes are not affected.

Q: – What is the Name of Default Application Pool in IIS ?

Default application pool named : DefaultAppPool

Q: – What are the main layers of IIS Architecture ?

IIS having mainly two layer Kernel Mode and User Mode

Q: – What is the Role of Http.Sys in IIS ?

HTTP.SYS is the kernel level components of IIS. All client request comes from client hit the HTTP.Sys of Kernel level. HTTP.SYS then makes a queue for each and every request for each and individual application pool based on the request.Whenever we create any application pool IIS automatically registers the pool with HTTP.SYS to identify the particular during request processing.

Q: – What are the different security settings available in IIS ?

Below are the commonly used IIS Security settings

1 Anonymous
2 Integrated Windows Authentication
3. Basic Authentication
4. Digest Authentication
5. Passport Authentication

For Set security permission you need to go to Virtul Directory > Right Click > Properties > Directory Security
Click on Edit Button .

Submitted By:-Rohit Kumar            Email-ID: – rohitkumar1372@yahoo.in