In a frog are the large intestine and cloaca same thing?

The answer is yes.

The large intestine is the final part of the digestive tract, and it stores waste before it is eliminated from the body. The cloaca is a chamber that receives waste from the digestive, urinary, and reproductive tracts, and it also serves as the opening for these systems to the outside of the body. In a frog, the large intestine and cloaca are the same thing.