New Jersey Statutes Title 2B. Court Organization and Civil Code 2B § 23-10

a. In the discretion of the court, parties to any trial may question any person summoned as a juror after the name is drawn and before the swearing, and without the interposition of any challenge, to determine whether or not to interpose a peremptory challenge or a challenge for cause. Such examination shall be permitted in order to disclose whether or not the juror is qualified, impartial and without interest in the result of the action. The questioning shall be conducted in open court under the trial judge's supervision.

b. (Deleted by amendment, P.L.2007, c. 204).