Abstract algebra book recommendations for beginners. I am taking abstract algebra in this semester. I find that my lecturer didn't provide enough examples for understanding. So I would like to ask what are the recommended books which has lots of solved problems and exercises? The lecturer said in this semester, he will cover group theory, ring theory and a bit of field theory. Which book contains extensive information in these three fields? 

Dummit & Foote has lots.
But following up on the "Artin" recommendation which is excellent, you can watch these great videos that follow "Artin" and see many examples very nicely articulated. You can probably get a lot more out of these lectures by Benedict Gross at Harvard:
http://www.extension.harvard.edu/open-learning-initiative/abstract-algebra
