Graduate Aptitude Test in Engineering
I would suggest you to follow the given tips to make yourself well prepared for the exam- You should understand the syllabus properly, you must go through the section-wise and topic-wise syllabus of your chosen branch in order to know what all you have to study and what to avoid.
Yes, you are eligible. You can apply for the same. Good Luck!!!
They have not mentioned anything for that specifically but I would suggest you to check with the particular PSUs whether you can apply or not.
What mistakes you have done?
No, once you are done for the same. You cannot go for it. However you can drop a mail to the authorities regarding the issue.
You can consider the below article for the same- http://www.engineering.careers360.com/articles/gate-2017-cutoff
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