In addition to what Ashish sir mentioned, I would also like to say that if you have low scores that doesn't mean you have lost all chances of getting one of the good jobs. The chances of getting the best job even with low scores are very high. This is provided that all other skillsets which you have are made attractive enough to offset for your low scores and you are able to market yourself well.
For more on this you may see -
/blog/show_post.asp?blog_posts_id=165
or
https://krunal-raichura.blogspot.com/2009_03_01_archive.html
There are some other articles as well which will give you more insights on what I have mentioned above.