{"id":256,"date":"2021-01-08T06:33:11","date_gmt":"2021-01-08T06:33:11","guid":{"rendered":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/aws-certified-sysops-administrator-soa-c01-question249\/"},"modified":"2021-01-08T06:33:11","modified_gmt":"2021-01-08T06:33:11","slug":"aws-certified-sysops-administrator-soa-c01-question249","status":"publish","type":"post","link":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/aws-certified-sysops-administrator-soa-c01-question249\/","title":{"rendered":"AWS Certified SysOps Administrator SOA-C01 &#8211; Question249"},"content":{"rendered":"<div class=\"question\">A user runs the command \u201cdd if=\/dev\/zero of=\/dev\/xvdfbs=1M\u201d on a fresh blank EBS volume attached to a Linux instance. Which of the below mentioned activities is the user performing with the command given above? <br \/><strong><br \/>A.<\/strong> Creating a file system on the EBS volume <br \/><strong>B.<\/strong> Mounting the device to the instance <br \/><strong>C.<\/strong> Pre warming the EBS volume <br \/><strong>D.<\/strong> Formatting the EBS volume<\/div>\n<p><\/p>\n<style> .hidden-div{ display:none } <\/style>\n<p>\t\t\t\t\t\t\t<button onclick=\"getElementById('hidden-div').style.display = 'block'\"> Show Answer <\/button> <button onclick=\"getElementById('hidden-div').style.display = 'none'\">Hide Answer<\/button><\/p>\n<div class=\"hidden-div\" id=\"hidden-div\"><span style=\"\"><\/p>\n<div class=\"answer\">Correct Answer: <strong>C<\/strong><\/div>\n<p><strong>Explanation:<\/strong> <\/p>\n<div class=\"explanation\">\nExplanation: When the user creates a new EBS volume and is trying to access it for the first time it will encounter reduced IOPS due to wiping or initiating of the block storage. To avoid this as well as achieve the best performance it is required to pre warm the EBS volume. For a blank volume attached with a Linux OS, the \u201cdd\u201d command is used to write to all the blocks on the device. In the command \u201cdd if=\/dev\/zero of=\/dev\/ xvdfbs=1M\u201d the parameter \u201cif =import file\u201d should be set to one of the Linux virtual devices, such as \/dev\/ zero. The \u201cof=output file\u201d parameter should be set to the drive that the user wishes to warm. The \u201cbs\u201d parameter sets the block size of the write operation; for optimal performance, this should be set to 1 MB.<\/div>\n<p><\/strong><\/span> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>A user runs the command \u201cdd if=\/dev\/zero of=\/dev\/xvdfbs=1M\u201d on a fresh blank EBS volume attached to a Linux instance. Which of the below mentioned activities is the user performing with the command given above? A. Creating a file system on the EBS volume B. Mounting the device to the instance C. Pre warming the EBS [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[3,252],"class_list":["post-256","post","type-post","status-publish","format-standard","hentry","category-aws-certified-sysops-administrator-soa-c01","tag-aws-certified-sysops-administrator-soa-c01","tag-question-249"],"_links":{"self":[{"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/posts\/256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/comments?post=256"}],"version-history":[{"count":0,"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/posts\/256\/revisions"}],"wp:attachment":[{"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/media?parent=256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/categories?post=256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exampracticetests.com\/aws\/SysOps_Administrator_SOA-C01\/wp-json\/wp\/v2\/tags?post=256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}