Codons are triplets of nucleotides (Adenine, Guanine, Cytosine, and Thymine in DNA/ Uracil in RNA) that are part of the genetic code used to translate the information from DNA into proteins. All the information in the code is translated by RNA which reads the code on the DNA in triplets or codons.
So, in this case, the sequence divided into codons would look like this :
AUG CAG GUU CAA