Hello nisheeth,since you rank and score seems quite well and good,but it's not upto the mark of drdo,yes you have a slight chances of getting called for interview at drdo.

I'm just sharing you the past records of ece branch ie ec gate paper cutoff of past years

1)2016 closing rank:-151

2)2015 closing rank:-179

And so on.......

You can see the change in cutoff every year,so it depends this year also on the various factors like:-

1)no. Of students appeared in the exam

2)difficulty level of question paper

You have a low chance of getting called at drdo apply for other psus too but don't be disappointed as you might also get a call this year,hope you get it what you want.Hope this helps you

All the best for future