Tough ASP.NET interview questions

• Describe the difference between a Thread and a Process?

• What is a Windows Service and how does its lifecycle differ from a “standard” EXE?
  

• What is the maximum amount of memory any single process on Windows can address? Is this different than the maximum virtual memory for the system? How would this affect a system design?
  

• What is the difference between an EXE and a DLL?
  

• What is strong-typing versus weak-typing? Which is preferred? Why?
  

• What’s wrong with a line like this? DateTime.Parse(myString
  

• What are PDBs? Where must they be located for debugging to work?
  

• What is cyclomatic complexity and why is it important?
  

• Write a standard lock() plus double check to create a critical section around a variable access.
  

• What is FullTrust? Do GAC’ed assemblies have FullTrust?
  

• What benefit does your code receive if you decorate it with attributes demanding specific Security permissions?
  

• What does this do? gacutil /l | find /i “about”
  

• What does this do? sn -t foo.dll
  

• What ports must be open for DCOM over a firewall? What is the purpose of Port 135?
  

• Contrast OOP and SOA. What are tenets of each
  

• How does the XmlSerializer work? What ACL permissions does a process using it require?
  

• Why is catch(Exception) almost always a bad idea?
  

• What is the difference between Debug.Write and Trace.Write? When should each be used?
  

• What is the difference between a Debug and Release build? Is there a significant speed difference? Why or why not?
  

• Does JITting occur per-assembly or per-method? How does this affect the working set?
  

• Contrast the use of an abstract base class against an interface?
  

• What is the difference between a.Equals(b) and a == b?
  

• In the context of a comparison, what is object identity versus object equivalence?
  

• How would one do a deep copy in .NET?
  

• Explain current thinking around IClonable.
  

• What is boxing?
  

• Is string a value type or a reference type?