The "Park Hopper Ticket" is to visit both parks on the same day. But to appreciate and enjoy each park I recommend the "One Park per Day" especially if you have never been to Disneyland.
Yes, you can with a park hopper ticket, but it is up to each individual.
The "park hopper" is to be able to enter the 2 parks in the same day. It costs a little more and I really don't recommend it if you've never been to Disneyland. The park is very large and you also have to consider that the lines are very long and it will take more time to enjoy the park and its attractions. California Adventure is the same, maybe not that big but still you won't be able to enjoy it in noon. If you have already visited the parks, the park hopper is a good option to visit the attractions that you like the most.
One park per day is more recommended
Thanks! Your answer is awaiting moderation.