Hello Divya
GRE is an independent exam platform that only acts as your gateway to some of the prestigious colleges.
Having an experience in job will not change your marks or improve your rank of GRE.
But when you write an SOP(STATEMENT OF PURPOSE) your job experience might give you an extra edge over others as the university will give you some preference as you have an x factor present
GRE SCORE VARIES
315+ is considered as decent score
330 is a good score that can get you, your dream college
Hope this helped
Thanks
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