How many rules are there in the YSlow version 2.0?(a) 23(b) 21(c) 27(d – InterviewSolution

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1.	How many rules are there in the YSlow version 2.0?(a) 23(b) 21(c) 27(d) 33
Answer» Right choice is (a) 23 The explanation: There are totally 23 rules in the ruleset of YSlow (V2) namely : Minimize HTTP Requests Use a Content Delivery Network Avoid empty src or href Add an Expires or a Cache-Control Header Gzip Components Put StyleSheets at the Top Put Scripts at the Bottom Avoid CSS Expressions Make JavaScript and CSS External Reduce DNS Lookups Minify JavaScript and CSS Avoid Redirects Remove Duplicate Scripts Configure ETags Make AJAX Cacheable Use GET for AJAX Requests Reduce the Number of DOM Elements No 404s Reduce Cookie Size Use Cookie-Free Domains for Components Avoid Filters Do Not Scale Images in HTML Make favicon.ico Small and Cacheable

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