The most important component of the .net framework is the CLR or the Common Language Runtime. The CLR manages and executes code written in .net languages. It activates objects, performs security checks, lays them out in memory, executes them and garbage collects these objects as well.The CLR is a runtime engine that loads required classes, performs just in time compilations, enforces security checks and a bunch of other runtime functions.The CLR executables are either exe or dll files that consist mostly of metadata and code. These executables must adher to a file format called the Portable Executable (PE) file format

Jobs: Using SQL Server Agent you can create and schedule jobs that automate routine administrative tasks. Database administrators create jobs to perform predictable administrative functions either according to a schedule or in response of events and conditions. Jobs can be simple operations containing only a single job step or can be extremely complex operations containing many job steps. SQL Server Agent is responsible for management and execution of all jobs. Agent must be running for jobs to be executed. SQL server 2k supports jobs containing operating system commands. Alerts: database administrators define alerts to provide event and performance condition notification and to execute jobs in response to SQL server events or performance conditions. E.g. when the log is 90% full an alert can be configured to fire a job that executes a job to back up and truncate the transaction log.

There can be multiple instances running in a SQL server. There are two types of instances: default instances and named instances. A named instance simply means that you define a name for an instance during installation and that you can access the instance using this name. A default instance is the one that is default. There can be only one default instance but multiple names instances. When thee are multiple instance then it leads to multiple services running which affects the system performance. Each instance has its own SQL server and SQL server agents services. For default instance the name of these services are MSSQLSERVER and SQLSERVERAGENT and for a named instance it is MSSQL$instancename and SQLAgent$instancename.

Both HTTP GET and HTTP POST use HTTP (Hyper Text Transfer Protocol) as the underlying protocol. The GET and POST methods have been widely in Servlets, CGI, ASP, and many more. Both of these methods encode the request parameters as name value pairs in the HTTP request. The GET method creates a query string and appends it to the script's URL on the server that handles the request. For the POST method the values are passed in the body of the HTTP request message.

Web services allow access to software through standard web protocols such as HTTP and SMTP. They enable software to interact with a wider range of clients. Web services can be consumed by any application that understands how to parse an XML. XML is the key technology used in web services.Microsoft .net web services support three protocols HTTP GET, HTTP POST and SOAP (Simple Object Access Protocol).For the clients to interact with the web services there must be a description of the method calls or interface that the web service supports. This web service description document is found in the XML schema called as WSDL (Web services description language).

The metadata of any .net assembly can be inspected at runtime for its type, method, properties, and events and so on. The mechanism to do this is termed as reflection and there are classes in .net which enable you to do so.  One can determine all classes that an assembly contains, members exposed by these classes, parameters the members expect, etc. The classes that enable you to do so reside in the System.Reflection namespace. An object's metadata is accessed through its Type class which is retrieved using the GetType() method.  Type T = MyClass.GetType (); One you have the type you can access it to get all other information of the class.