Hello aspirant,

i hope that you are doing absolutely great.

With reference to your above mentioned query, i would like to tell you that according to the previous years cut off rank for isro and drdo, you must have a gate rank below 150 to get a interview call from these esteemed psus. For both of the psus you must be among one of the top ranked students.

And to describe further, The GATE score for shortlisting the candidates for metallurgical Stream was 700 in previous years. It's still the prediction as the cutoff ranks and marks keeps varying according to the previous year cutoff.

Further, for more information you can follow the below link :

https://engineering.careers360.com/articles/drdo-recruitment-through-gate

I hope that this will help.