Cs professional

After the recent ICSI announcement, you will get two more attempts under the old CS Professional syllabus (i.e. Dec 2015 and June 2016).
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If you have already switched over to the new syllabus, you have the option to switch back to the old syllabus or else you can continue under the new syllabus too. For more of such FAQs and applicable form, view ICSI announcement.