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  1. Answer
    Plugins allows extra functions to operate in WordPress.  WordPress plugins use hooks which are placed throughout the WordPress code.  They allow plugins to do the following: 
    • Insert things (text, images, social media links, etc.) above or below a post’s content
    • Change RSS feed content
    • Add things like new <meta> tags to a page’s <head> area Display information from other sites or services
    • Add widgets
    • Add options to existing Settings screens, or create whole new Settings screens
    • Add extra fields to posts and pages
    • Create new post types and taxonomies
    • Send extra email notifications
    • Change user roles
    • Change administration menus
    • Add Dashboard widgets
    • Add importers for other blogging formats or services

    Explanation: Not available 


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  2. Answer
    Plugins probably stores data in database’s options table (wp_options, unless we chose another prefix during the installation). Plugins settings are found in the setting section of the admin menu.

    Explanation: Not available 


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  3. Answer
    The best way to evaluate a plugin is to simply open up its files and read the code.

    Explanation: Not available 


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  4. Answer
    After installing WordPress plugins we have consider the flowing questions that may arise they are:
    •	Do JavaScript-based administrative functions still work?
    •	Does your site slow down?
    •	Does the plugin add warnings to the top of every administration screen?  If so this plugin needs to be configured or just invitations to buy things and/or promote the company on your social media networks.
    •	 Does it add spam links to your source code?
    •	 Check the site in another browser, one where you are not logged in to WordPress
    •	Does it put ads on your admin screens—even those for other plugins’ settings.
    •	Does it add a Dashboard widget full of links to the developer’s other products?
    •	 Does it add text to your site’s footer without your permission?
    •	 Does its settings screen blend in with the WordPress Dashboard, or does it look completely different.

    Explanation: Not available 


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  5. Answer
    For trouble shooting WordPress plugins we have to follow the after-mentioned things:
    •	Deactivate the new plugin if there is any problem with it and switch to one of the default themes.
    •	Install the Plugins Performance Profiler (P3) if the site is too slow. This plugin will scan the site automatically and report how the plugin affected the site’s that load time.

    Explanation: Not available 


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