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Web technology XML– Frequently Asked Questions with answers
Posted Date:
28 Jan 2008
Total Responses:
2
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Posted By: Salma Member Level: Gold Points: 5
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Web technology XML– Frequently Asked Questions with answers
1.) DOM Interfaces and DOM Implementations?
The DOM specifies interfaces, which may be used to manage XML or HTML documents. It is important to realize that these interfaces are an abstraction they are a means of specifying a way to access and manipulate an application’s internal representation of a document. Interfaces do not imply a particular concrete implementation. Each DOM application is free to maintain documents in any convenient representation, as long as the interfaces shown in this specification are supported.
2.) The main difference between XML and HTML?
• XML was designed to describe data and to focus on what data is. HTML was designed to display data and to focus on how data looks. HTML is about displaying information, while XML is about describing information.
• The tags used to mark up HTML documents and the structures of HTML documents are predefined. • XML allows the author to define his own tags and his own document structure.
3.) What are the services that should not be used in a Clustered Environment?
A) File Services
B) Time services
C) Web logic events
D) All the above.
E) None of the above.
Ans: D)
4.) The process of propagating the changes in the properties of a server group during run time to all the associated clones is called?
A) Ruther’s Effect.
B) Simpson’s Effect.
C) Ripple Effect.
D) None of the above.
Ans: C)
5.) Horizontal Scaling is:
A) When Clones of an application server are defined on multiple physical machines.
B) When Clones of an application server are defined on single physical machines.
C) When no Clones of an application server are defined on any physical machines.
D) None of the above.
Ans: A)
6.) What is Document Type Definition?
A Document Type Definition (DTD) is a set of syntax rules for tags. It tells about what tags can use in a document, what order they should appear in, which tags can appear inside other ones, which tags have attributes, and so on.
7.) What is a Namespace?
A namespace is a collection of element and attribute names identified by a Uniform Resource Identifier reference. The reference may appear in the root element as a value of the xmlns attribute.
8.) What is meant by XML?
The ‘XML’ stands dor Xtensible Markup Language’. It is used to create and define own tags and attributes.
9.) Give a few examples of types of applications that can benefit from using XML?
There are literally thousands of applications that can benefit from XML technologies. The point of this question is not to have the candidate rattle off a laundry list of projects that they have worked on, but, rather, to allow the candidate to explain the rationale for choosing XML by citing a few real world examples. For instance, one appropriate answer is that XML allows content management systems to store documents independently of their format, which thereby reduces data redundancy. Another answer relates to B2B exchanges or supply chain management systems. In these instances, XML provides a mechanism for multiple companies to exchange data according to an agreed upon set of rules. A third common response involves wireless applications that require WML to render data on hand held devices
10.) When constructing an XML DTD, how do you create an external entity reference in an attribute value?
When using SGML, XML DTDs don't support defining external entity references in attribute values. It's more important for the candidate to respond to this question in a logical way than the candidate know the somewhat obscure answer.
11.) How would you build a search engine for large volumes of XML data?
The way candidates answer this question may provide insight into their view of XML data. For those who view XML primarily as a way to denote structure for text files, a common answer is to build a full-text search and handle the data similarly to the way Internet portals handle HTML pages. Others consider XML as a standard way of transferring structured data between disparate systems. These candidates often describe some scheme of importing XML into a relational or object database and relying on the database's engine for searching. Lastly, candidates that have worked with vendors specializing in this area often say that the best way the handle this situation is to use a third party software package optimized for XML data.
12.) What is SOAP and how does it relate to XML?
The Simple Object Access Protocol (SOAP) uses XML to define a protocol for the exchange of information in distributed computing environments. SOAP consists of three components: an envelope, a set of encoding rules, and a convention for representing remote procedure calls. Unless experience with SOAP is a direct requirement for the open position, knowing the specifics of the protocol, or how it can be used in conjunction with HTTP, is not as important as identifying it as a natural application of XML.
13.) What are the rules for making a tag name in XML?
Rules for making a tag name are
1.It should start with a letter or underscore( _ )
2.There are no reserved words , but however xml(in any case) should not be used as a tag name
3.It can include digits, hyphen, periods, ':' can be used but best avoided because it is used for the name space.
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Responses
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| Author: Molly 31 May 2008 | Member Level: Gold | Rating:  Points: 2 | Very useful Sample questions and Interview questions. Thanks for the effort.
| | Author: Salma 31 May 2008 | Member Level: Gold | Rating: Points: 2 | Thank you soo much for your feedback.
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