AFAIK

The Main Components of the SQL Architecture are NETWORK LIBRARY, provide connectivity between the client and the server process.(Client request come to  SQLserver via NL) DATABASE ENGINE, is the server process that sits at the heart if a SQL Server System(RDBMS). Its logically divided as Relational Engine and the Storage Engine. RELATIONAL ENGINE: RE provides the functionality that control query execution(the request is parsed, optimised and executed) OLE-DB Request is passed to the storage engine STORAGE ENGINE- SE pass the IO request to OS.(Storage Engine manages the access and modification of data. Transaction manager, Page Manager, Access methods, Lock manager, File/Device Manager, Buffer, log, sort manager and Utilities)

Named pipes enables clients applications to request a reliable and two way connection between the client application and Sql Server, across a network. A named pipe has a name which follows the UNC naming convention : \\Server\pipe\name The default names pipe for SQL server is :                 \\Server\pipe\sql\query A named instance would have a named pipe of                \\server\pipe\MSSQL$instancename\sql\query Early versions of SQL Server only provided Named Pipes. Named Pipes also allows for impersonation of a clients credentials. The feature is used by SQL server when using Linked Servers. The clients logon credentials are passed across to the Linked Server for authentication. Named Pipes can operate over TCP/IP, NETBEUI or IPX as it indirectly relies on the Common Internet Files Sytems

what is spa? Single page application are applications that fit in one page with rich and fluid user experiences like a desktop based applications. Why is SPA? All web based elements (html, CSS,javascript) are downloaded from the server on single page load and avoid the continuous page post back. i can explain what this mean. Suppose your web application is made of certain flow and it consists of 5 different pages. Each page need to get data from the user and save before moving to the next page. So when we navigate from one page to other it need to make a round trip to server to store the data in one page and get the data for the next page to display. but in spa we can avoid the continuous post backs. The whole page will not post back any time other than the first load. But it communicate to the server dynamically behind the scene and can achieve the same functionality. Spa using ext.js designing a SPA using ext.js is a challenging task if you are unaware about the ext.js ...

Prototype are link or pointer to other objects. All objects have prototype. Objects are chained together by the prototype chain. //Constructor function Office(name, location, domain) { this.name=name; this.location=location; this.domain=domain; } //Prototype Office.Prototype={     interview: function(){ alert("Hi office location is"+ this.location); } }; var myoffice= new Office("expo-e", "london", "telecommunication"); myoffice.interview; // hi office location is london In the above example myoffice prototype is shared with Office Office prototype is shared with object Object prototype is shared with null myoffice->Office->Object->null, makes the complete chain of prototype. when you lookup a property on an object, it will walk up the prototype chain until its found. First my office  is checked then the Office is checked, then object and finally it reaches null. 

A Javascript closure is when an inner function is inside of an outer function (a function inside a function). The inside function has access to 1. Variables defined in the outer function 2. Argument passed into the outer function var CreateExample= function(example){                                     return function(text){                                               console.log(example +" "+ text);                                        } }; var example1= CreateExample("Hi"); var example2= CreateExample("Hello"); example1("test one");   //Hi test one example2("test two");  //Hello test two. In most object oriented languages like java/c#, when you reach re...

I started using WIFI almost 8 years back (in 2006) when I moved to the UK. Before that, during the engineering degree I studied about WIFI energetically for achieving grades. Nowadays it’s a common friend and every day without her presence, it is awful to envisage. One day my data allowance on the mobile run out and I want to go to an event in central London and want to use the GPS. I had to take map printout and follow the route. I depend a lot on GPS navigation rather than a paper map. So I reached the location half an hour later in the event. Eventually I missed the event and while walking back to the tube station I was thinking about storing the WIFI somehow and using it later, like a battery. People might think why can’t I carry a portable modem and a laptop, but I am thinking about much sophisticated device than that like a battery for the phone. Did anyone think about a life without batteries now? It is there since most of us on this planet born. In 1749 Benjamin Franklin f...

Some steps, tips for the installation of client certificate for Webservice and usage. Microsoft Link Tech republic Link Stack overflow