Preguntas Entrevistas

1. What do I need to create and run an ASP.NET application?
• Windows 2000, Windows Server 2003 or Windows XP.
• ASP.NET, which can be either the redistributable (included in the .NET SDK) or Visual Studio .NET.
1. Where can I download the .NET SDK?
.NET SDK can be obtained here.
(You have to install the Microsoft .NET Framework Version 1.1 Redistributable Package before installing the.NET SDK.)
2. Are there any free IDEs for the .NET SDK?
o Microsoft provides Visual Studio 2005 Express Edition Beta for free. Of particular interest to the ASP.NET developers would be the Visual Web Developer 2005 Express Edition Beta 2 available as a free download.
o The ASP.NET Web Matrix Project (supported by Microsoft) is a free IDE for developing ASP.NET applications and is availablehere.
o There is also a free open-source UNIX version of the Microsoft .NET development platform called Mono available for download here.
o Another increasingly popular Open Source Development Environment for .NET is the #develop (short for SharpDevelop) available for download here.
3. When was ASP.NET released?
ASP.NET is a part of the .NET framework which was released as a software platformin 2002.
4. Is a new version coming up?
ASP.NET 2.0, Visual Studio 2005 (Whidbey), Visual Web Developer 2005 Express Edition are the next releases of Microsoft's Web platform and tools. They have already been released as Beta versions. They are scheduled to be released in the week of November 7, 2005.
5. Explain Namespace.
Namespaces are logical groupings of names used within a program.There may be multiple namespaces in a single application code, grouped based on the identifiers’ use. The name of any given identifier must appear only once in its namespace.
6. List the types of Authentication supported by ASP.NET.
o Windows (default)
o Forms
o Passport
o None (Security disabled)
7. What is CLR?
Common Language Runtime (CLR) is a run-time environment that manages theexecution of .NET code and provides services like memory management, debugging, security, etc. The CLR is also known as Virtual Execution System (VES).
8. What is CLI?
The CLI is a set of specifications for a runtime environment, including a common type system, base class library, and a machine-independent intermediate code known as the Common Intermediate Language (CIL). (Source: Wikipedia.)
9.List the various stages of Page-Load lifecycle.
o Init()
o Load()
o PreRender()
o Unload()
10. Explain Assembly and Manifest.
An assembly is a collection of one or more files and one of them (DLL or EXE) contains a special metadata called Assembly Manifest. The manifest is stored as binary data and contains details like versioning requirements for the assembly, the author, securitypermissions, and list of files forming the assembly. An assembly is created whenever a DLL is built. The manifest can be viewed programmatically by making use of classes from the System.Reflection namespace. The tool Intermediate Language Disassembler (ILDASM) can be used for this purpose. It can be launched from the command prompt or via Start> Run.
11. What is Shadow Copy?
In order to replace aCOM component on a live dedicated server, it was necessary to stop the entire website, copy the new files and then restart the website. This is not feasible for the web servers that need to be always running. .NET components are different. They can be overwritten at any time using a mechanism called Shadow Copy. It prevents the Portable Executable (PE) files like DLLs and EXEs from being locked.Whenever new versions of the PEs are released, they are automatically detected by the CLR and the changed components will be automatically loaded. They will be used to process all new requests not currently executing, while the older version still runs the currently executing requests. By bleeding out the older version, the update is completed.
12. What is DLL Hell?
DLL hell is the problem...