A bachelor's is the time to get a good understanding of your domain's fundamental principles, stuff that will stand you in good stead even 10 years from now. As a new college grad you will be tested on those concepts and not much else, esp. if your major is Computer Science.

I would look for extensive knowledge of data structures and algorithms, operating systems, networking and databases. If you are interested in a particular domain like machine learning or web development then it pays to know a bit about that as well.

More specifically for a job hunt, you should work your way through Cracking the Coding Interview, careercup.com and leetcode.com. These have questions marked out from companies like Google, Facebook, Amazon etc.