job application question?

I have two questions for job application security.

 

1) when I applied some jobs online for example using dice, monster..., I recevied some other recruiters' emails and they sent me some similar job opennings, could recruiter trace my online job application?

2) I forwarded my update resume using my yahoo account, I recevied some other recruiters' emails for similar jobs the second day, could my personal yahoo account was already hacked by other person? This is my most concern, could I change the password to solve the problem.

 

Thanks for your answers!!