already well prepared candidate is a 5 mg shot of 'Methylphenidate' half an hour before the test !
This drug, available in many medical stores, enhances and focuses one's attention and sharpens the memory. It is given to children in small doses to combat inattentiveness in school.
If a 5 mg tablet is taken before the test, the candidate will find himself effortlessly focussed to the right extent during the test. Besides, his memory also will function very sharply.