What is XQuery primarily used for?

• Creating databases
• Querying XML data
• Styling HTML documents
• Replacing SQL

Which type of data does XQuery work with?

• JSON
• YAML
• XML
• CSV

What does FLWOR stand for in XQuery?

• File, Loop, While, Output, Return
• For, Let, While, Order, Return
• For, Let, Where, Order by, Return
• Find, Loop, Write, Output, Read

Which symbol is used to define a variable in XQuery?

• @
• $
• %
• #

Which keyword is used to assign a value in XQuery?

• var
• const
• let
• define

What does the typeswitch expression in XQuery do?

• Switches between XML schemas
• Switches based on variable type
• Filters by value
• Joins multiple queries

Which function is used to retrieve the length of a string?

• length()
• strlen()
• string-length()
• text-length()

What will substring("XQuery", 2, 3) return?

• XQu
• Que
• uer
• Que

What does the empty() function return?

• true if sequence is not empty
• false always
• true if sequence is empty
• the length of the sequence

What is the purpose of exists() in XQuery?

• Checks if a file exists
• Tests if a variable exists
• Returns true if sequence is non-empty
• Counts elements

What is a primary benefit of using XQuery modules?

• Minifies output
• Enables reusable functions across files
• Adds support for CSS
• Converts JSON to XML

How do you handle runtime errors in XQuery?

• Using try-catch
• Using rescue blocks
• Using catch-exception
• Using error-on

Which function raises a user-defined error in XQuery?

• raise-error()
• throw()
• error()
• fail()

How can you define a function in a module?

• define function local:name()
• module function()
• declare function local:name()
• public function name()

What does the fn:collection() function do?

• Returns a sequence of nodes from multiple XML documents
• Combines arrays
• Compresses XML
• Loads stylesheets