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What are application pools in IIS?( ASP.NET Interview questions)

Application pools allow us to isolate our applications from one another. Basically we host multiple applications in IIS.

Now let’s say there is no application pool. In this case, if one of the application encounter an error and get crashed other application also get crashed because at the end all of them are executing under same IIS.


In the above image all four apps App1, App2, App3 and App4 are hosted under single IIS. But App1 and App2 run inside application pool1 and App3 and App4 run inside application pool2. If because of some reason App1 crashes it won’t affect either App3 or App4.

One more related question to application pool people ask are Application domain , do read this article written by which explain application domain from interview perspective

Thanks for reading. Hope to see your comments and feedbacks.

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Tags: application pool interview questions, interview questions with answers, c# appdomain interview questions, csharp interview questions, iis interview questions, it interview questions with answers, programming interview questions

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