IIS and .NET 2.0 interview questions


I had a 2 hour layover and was browsing the newsgroups.  A person posted a question wondering about interview questions regarding IIS and .NET 2.0.  I’m sure there are many other questions that I didn’t think to ask, here is the list I came up with.  If you have any questions, feel free to post them to the comments and I’ll update the thread.

PS: This is meant for a ‘systems’ or ‘itpro’ type person and not necessarily a developer type individual.

General IIS related questions

  • How do you isolate and troubleshoot an ASP and / or ASP.NET application?
  • What is your idea of locking down a server?
  • How do you feel about having developers or anyone else making changes directly in production?  Aka how do you normally handle change management.
  • What perfmon counters do you find useful in troubleshooting an IIS or related problem.
  • Do you have experience in working with web-farms, load-balancing environments?
  • What is your ideal way of handling content.  Remote Storage / NAS (network attached storage) vs. local content and replication.  If you use local content and replication what tools do you to use?
  • Are you familiar with DFS?
  • What debugging tools do you use for IIS?
  • What / Where would you put global .NET settings.  How would you lock them down?
  • Do you have any experience with SSL certificates?
  • Do you have experience with machines with multiple IP’s and how to handle several sites / applications on a machine.
  • What is your preference of handling machine accounts?  Do you like local vs. Active Directory based accounts.
  • Do you have experience with working in an AD environment that supports IIS.
  • Do you have experience with NLB (network load balancing) that comes with IIS.
  • How do you monitor the applications / sites to ensure the uptime is appropriate.  This might apply more to a monitoring environment, but it is good to know what to monitor.
  • Are you familiar with compression and the benefits.
  • Do you know what MIME types are for?
  • Do you know how to list all running applications on a server to determine which application pools are owned by what sites. (IISAPP)
  • Are you familiar with IISState, IIS Debug Diag. SSL Diag, SMTPDiag in the resource kit.
  • What tools do you use or have experience in load-testing an application.
  • What are some of the tools provided by MS.  WCAT, TinyGet, WAST.
  • Do you know how to configure host-headers and how they related to DNS.
  • What is your backup and recovery strategy for IIS
  • How would you handle migrating to another box?
  • How do you handle changes in IIS, scripting or manual changes?
  • Are you familiar with scripting languages such as VBScript, JScript, Powershell.
  • Are you familiar with IISCfg and related scripts such as adsutil
  • Do you have experience supporting multiple environments of IIS (different domains, dev / test /integration / production)
  • Are you familiar with ways to connect to remote databases such as db2, oracle, sql server
  • Do you know the differences between anonymous, integrated, basic, digest authentication.
  • What is your preferred method of publishing content?  FTP? FrontPage? WebDAV? Folder copy? Publish to a staging machine and replicate to the content source either on a nas or individual nodes.
  • Are you familiar with the other services in SMTP, FTP?
  • Do you know how to configure a smarthost?
  • Does the built-in FTP service support host-headers?
  • Do you know the benefits of using a COM+ package vs. Regsvr32
  • What certain local group is necessary if it is configured as a application pool user.
  • Do you know how to check a COM+ component to ensure it will not leak memory.

.NET 2.0

  • Can you run the 1.1 and 2.0 on the same box?  What are the limitations.
  • Can you explain what the ‘/bin’  folder is used for.
  • Do you know what user instancing is.
  • Do you know the difference between precompiled applications and publishing the source code.
  • Do you have any experience with partial trust or CAS (code access security)
  • What types of things cause an appdomain or application pool recycle.
  • What are the new folders in .NET 2.0 and what are they used for.
  • How / why does the machine key need to be the same across all machines in a web-farm.


  • What makes the IUSR account unique in IIS7 vs. previous versions.
  • What are some of the new ways of troubleshooting, Logging in IIS7
  • What are the major benefits of IIS7?  (FREB, Integrated Pipeline, IUSR same on all w2k8 boxes, Shared configuration, Modular architecture, configuration changes


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