Canned vegetables can last quite a long time if canned properly. Vegetables that have been canned can last for as many as 3-5 years if stored correctly.
Most bacon has been smoked, but not cooked. Microwave bacon is partially cooked.
Not usually, but it should be heated. You can just put it in a saucepan on a medium heat until it gets to your desired temperature. Unless it specifies on the label, you most likely will not need to cook canned pork and beans.
Salsa, like anything else, can be canned if properly cooked. All steps in the process need to be sanitized, sterile, and hot.
Yes, tuna in a can and in the newer pouches is completely cooked. It has been cooked, cooled, properly canned with bones removed. It can be purchased packed in water, or oil, which is drained off before using.
yes
Microwave it. Microwaves are your friend.
yes you can unfreeze frozen food that has been already cooked and eat it
Any type of raw fish can give a cat tapeworms. If the fish in the can has not been cooked, then yes.
An example is tinned salmon. The salmon is steam cooked while in the tin, and can be eaten straight from the tin - any bones (usually parts of the spine) have been cooked and soft.
Living accomadations were reall terrible because they were served canned string beans, rice that had been cooked for too long, canned vienna sausage, and canned apricots. Only a few people ate and the rest didn't want to be "impolite."
Natural, fresh food, has biotic properties that directly-benefit health. Once something is cooked, pasteurized, salted and canned - most of the beneficial attributes of that food have been destroyed.