DOT NET Interview Questions - DotNetSpider
DOT NET Interview Questions - DotNetSpider
DOT NET Interview Questions - DotNetSpider
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web service. Both these services are provided by different company. Now we want to<br />
build a functionality which needs to validate a credit card and also check that addresses<br />
are proper. In short we will need functionalities of both the “CreditCard” and<br />
“AddressCheck” service. Also note the “CreditCard” service has its own business layer<br />
and DAL components, which can be in a proprietary language. It’s very much possible<br />
that the whole Credit card service is made in .<strong>NET</strong> and the Address check is SAP<br />
implementation or JAVA implementation. But because both the systems provide there<br />
functionality using Web services which is nothing but basically XML message<br />
communication. So we have made new service which sits like a FAÇADE on top of both<br />
the web service and performs both functionalities in one common service. You will see I<br />
have made a third service which sits on top of both the webservice and consumes them.<br />
Also you can see that the UI part of the systems have access to Buisness layer and Web<br />
service of there system. But the service which does both these check has only access to<br />
the Web service.<br />
Note:- It’s beyond the scope of this book to discuss about SOA. But just to keep you safe<br />
during interview this book has tried to clear some basics of SOA.<br />
(I)What are different ways you can pass data between tiers?<br />
There are many ways you can pass data between tiers :-<br />
√<br />
√<br />
√<br />
√<br />
Dataset the most preferred one as they maintain data in XML format.<br />
Datareader<br />
Custom classes.<br />
XML<br />
(A)What is Windows DNA architecture?<br />
Note :- If you have worked with classic ASP this question can come to you.<br />
The Windows Distributed interNet Applications Architecture (DNA) is a Microsoft<br />
blueprint for robust, scalable, distributed business software. Windows DNA has evolved<br />
over time and was not preplanned. It gives all combined advantages of Centralized<br />
mainframe, application servers, internet technologies and Personal computers. Windows<br />
DNA is a evolution which started from mainframes (Where all logic was centralized) ,<br />
Fox pro ages ( Where we talked in terms of two tier systems) , VB6 / SQL SERVER<br />
(Three tier where we talked in terms of having one more tier which was mainly COM<br />
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