Interview Questions.

Question 1. What Is Xquery?

Answer :

XQuery is a XML question language which was designed to question XML data. It is equal like SQL for database tables. XQuery is used to retrieve facts from the XML record.

Question 2. What Is The Use Of Xquery Language?

Answer :

XQuery is a useful language for finding and extracting elements and attributes from XML files. Its foremost usages are:

    To retrieve both hierarchal and tabular information.
    To question tree and graphical structures.
    To build internet pages.
    To query net pages.
    To rework XML files into XHTML documents.
    Best for XML-primarily based databases and object-primarily based databases. Object databases are a whole lot more flexible and powerful than in basic terms tabular databases.

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Question 3. In Which Year Xquery Was First Appeared?

Answer :

XQuery became first seemed in 2007. It became designed by using W3C and became the W3C advice on January 23, 2007. XQuery three.Zero is a W3C advice from April eight, 2014.

Question four. Explain The Syntax Rules For Xquery.?

Answer :

A list of primary syntax regulations for XQuery:

    XQuery is case sensitive.
    Attributes and variables that we used ought to have valid XML names in XQuery elements.
    XQuery should be written inside unmarried and double rates.
    XQuery variables should be described as: $(variable name). For example: $ebook.
    XQuery comment can be written between colon (:). Like :(: Comment in XQuery:)

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Question five. What Is The Difference Between Xquery And Xpath?

Answer :

Difference between XQuery and Xpath:

XQuery is a functional programming and question language while XPath is XML course language.

XQuery is used to extract and control facts from both XML documents or relational databases at the same time as XPath is used to compute values like strings, numbers and Boolean sorts from any other xml files.

 

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Question 6. What Is The Difference Between Xquery And Xslt?

Answer :

    XQuery is program driven even as XSLT is file-pushed.
    XQuery is declarative whilst XSLT is functional.
    XSLT is written in XML whilst XQuery isn't written in XML.

Question 7. How To Define Functions In Xquery?

Answer :

XML has many build-in features. XQuery capabilities normally made perform with string values, numeric values, date and time comparisons, Boolean values and so on.

XQuery additionally helps you to make your own features.

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Question eight. How To Call Xquery Functions:

Answer :

Example 1: When you use feature in an element.

<name>uppercase($booktitle)</name>  

Example 2: When you operate function inside the predicate of a direction expression.

Document("bookmart.Xml")/book place/e book[substring(title,1,5)='Jungle']  

Example three: When you operate function in a let clause

allow $name := (substring($booktitle,1,4))

Question nine. How To Perform Comparison In Xquery?

Answer :

In XQuery, contrast is finished with widespread assessment or price contrast.

1. General Comparison: It is done through the usage of the subsequent symbols.

Ex: =, !=, <, <=, >, >=

2. Value Comparison: The fee evaluation is completed with the aid of using the subsequent symbols.

Ex: ne, lt, le, eq, ge, gt.

See this situation:

$book place//book/@q > 100  

If any q attributes have values extra than one hundred, the expression will return proper otherwise fake.

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Question 10. Which Types Of Problems Can Be Solved By Xquery?

Answer :

    XQuery may be used to solve the following queries in XML records:
    XQuery is used to retrieve data in a web provider.
    It is used to generate summary record.
    It is used to convert facts from XML to XHTML.

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Question eleven. What Do You Mean By Xquery Flwor?

Answer :

FLWOR is an acronym which stands for "For, Let, Where, Order with the aid of, Return".

For - It is used to pick out a series of nodes.

Let - It is used to bind a series to a variable.

Where - It is used to filter out the nodes.

Order by means of - It is used to kind the nodes.

Return - It is used to specify what to return (gets evaluated as soon as for each node).

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Question 12. What Is The Use Of Xquery Html Format?

Answer :

XQuery HTML layout is a way to transform an XML file into an HTML page.

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Question thirteen. What Is Selecting And Filtering Element In Xquery?

Answer :

XQuery FLWOR and Path expression are used for choosing and filtering the XML elements. Both are used to pick out and filter the preferred factors.

For instance:

for $a in document("bookmart.Xml")/book place/book  
wherein $a/fee<a hundred and fifty  
order by using $a/title  
go back $a/name

XQuery Tutorial

Question 14. How To Perform Conditional Operations In Xquery?

Answer :

Conditional operation in XQuery is If-Then-Else operation. Let?S take an example to peer the way to use it:

Example:

for $a in doc("bookmart.Xml")/book place/book  
go back  if ($a/@category="ADVENTURE")  
then <child>facts($a/identify)</child>  
else <adult>information($a/title)</adult>

Question 15. What Is The Syntax Of Xquery Language?

Answer :

The elements, attributes and variables in XQuery language must be legitimate XML names and follow case sensitivity.

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Question 16. What Do You Mean By Xquery Add?

Answer :

XQuery Add is used for adding elements, attributes, HTML elements and text inside the outcomes from the enter files.

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Question 17. How To Use Xquery Flwor With Html?

Answer :

If you need to place HTML element with XQuery FLWOR, you need to have to upload and tags into the FLWOR expression.

For instance:

<ul>    
    
for $x in document("books.Xml")/bookstore/ebook/name    
order through $x    
return <li>$x</li>    
    
</ul>

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Question 18. What Are The Different Types Of Xquery Functions?

Answer :

A list of different forms of XQuery features:

    Accessor Functions
    Error and Trace Functions
    Numeric Functions
    String Functions
    AnyURI Functions
    Boolean Functions
    Duration/Date/Time Functions
    QName Functions
    Node Functions
    Sequence Functions
    Context Functions

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Question 19. What Is The Use Of Time And Date Function In Xquery?

Answer :

In XQuery, time and date feature is used to get time and date.

There are three forms of time and date capabilities in XQuery:

    cutting-edge-date()
    contemporary-time()
    contemporary-datetime()

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Question 20. What Is The Use Of Current-date() Function In Xquery?

Answer :

The XQuery modern-day date function is used to retrieve the current date.

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Question 21. What Is The Use Of Current-time() Function In Xquery?

Answer :

The XQuery current-time feature is used to retrieve the contemporary time.

Question 22. What Is The Use Of Current-datetime() Function In Xquery?

Answer :

The XQuery modern-day-date time() characteristic is used to return the current date and time.