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You need to configure filtering for the Product page.
Which filtering option should you use?
A. products/pages/products.aspx?productiD=*&.productCategory=*
B. products.aspx;productID;productCategory;lucernepublishing.com
C. products;productID;productCategory;lucernepublishing.com
D. products/pages/products.aspx?*
E. productID;productCategory
Correct Answer: E
Explanation/Reference:
Enabling canonical link parameter filtering means SharePoint will strip all parameters from links unless you specify otherwise when reporting URLs to search engines. In other words, you can explicitly state when parameters should be included with links and what those parameters should be.
If you want certain parameters to be tracked by search engines, click Filter link parameters, and then enter the parameters in the box. Be sure to separate parameters with a semicolon (for example, year;month).
http://office.microsoft.com/en-001/sharepoint-help/optimize-your-website-for-search-seo-HA102900145.aspx
If we need some parameters necessary, then we can specify them as important in canonical filtering. So that feature will strip all parameters from URLs except specified. For example we have two URLs like
http://SiteURL/StudentExams?year=2008&month=11
http://SiteURL/ StudentExams?year=2008&month=12
In the above URLs we need year and month parameters. By specifying the year and month parameters as separate, that feature will strip all parameters from URLs except year and month.
http://www.sharepoint2013.me/Blog/Post/321/Canonical-URL-filtering-in-SharePoint