The defendant has a right to be represented by counsel at the
examination, and the district attorney also has a right to be present,
but both such rights may be waived. Upon the conclusion of the
questioning of a witness upon the written interrogatories, he may be
further examined by the attorney or representative of the party who
requested his examination, and may then be cross-examined by the
attorney or representative of the adverse party. Each such attorney or
representative may register objections to the authority or
qualifications of the commissioner, to the manner in which the
examination is conducted, and to the admissibility of evidence, and all
such objections must be recorded and transcribed.