Certainly.
All vegetables are kosher if they have been checked and are bug free
YES! it is just that some are Kosher and don't eat pork and only but Kosher food. It all depends on how strict their particular religion is.
1. Kosher and treif (non kosher) 2. Meat 3. Dairy 4. Pareve (neither dairy or meat - vegetables, fruit, minerals, fish, and eggs)
Kosher applies to vegetables too. All pure minerals are kosher.
There is no non-kosher fruit.
Religiously observant Jews will only eat pepperoni if it is certified kosher. Most pepperoni is a pork product, so it will not have such certification. "Fake pepperoni" may be a vegetable or beef product and will, therefore, may have such certification.
In any supermarket, look for canned fruit with a kosher certification on the label.
Vegetables
Not all of them are kosher. It will say on the box.
Kelloggs fruit snacks
Yes, there are no restrictions on fruit for Passover.
Grapes, as a fruit, are kosher. However, grape products have additional rules specific to grapes due to the religious significance of the fruit.