PHP Own assessment of knowledge 9/10 Over 8 years of study and use PHP as a server-based solution led me to an understanding of the principles of the language features at a low level, the ability to optimize the script to find errors in someone else\'s code and avoid mistakes in my own. During this period I was involved in the creation of highly stable systems, applications designed to meet the requirements of customers, constantly faced with the tasks associated with the interaction of different technologies with PHP. Of the frameworks using CodeIgniter, but not against learning other popular libraries. Yes, of course I know what the MVC paradigm and what programming patterns in PHP. MySQL Own assessment of knowledge 8/10 To store data often use MySQL, not once optimized difficult queries with difficult JOIN-requests. If necessary, resort to the use of VIEW and TRIGGER, writing stored procedures, where appropriate, to always use the keys required type for tables with large amounts of data. Love and know how to use EXPLAIN. The maximum amount of the table with which to work - 98 GB. jQuery Own assessment of knowledge 7/10 To perform tasks on the client-side prefer jQuery. However, «pure» JavaScript for me is not a problem. I can write a plugin for jQuery. I have the notion that the DOM is and how it works. Use jQuery to deal mainly with the elements of the DOM and AJAX-requests. HTML, CSS Own assessment of knowledge 7/10 Like many of us, starting with the layout of static pages. At the moment the specifics of the modern browsers I\'m interested more in terms of development than markup, so some tweaks if necessary have to finish. However, to code a psd-pattern of any difficulty for me still is not complicated (but is boring) task.I love HTML5, trying to love CSS3. XML, JSON, CSV, etc Own assessment of knowledge 9/10 Writing parsers, written generators, converters also wrote. Mercurial, GIT, SVN\'s Own assessment of knowledge 6/10 Always use for their own convenience.