No exam necessary. If you have no knowledge of Hebrew, or if you have partial knowledge of the Hebrew alphabet and know 10 to 20 words, you are considered a beginner and should register for Hebrew 10.
When Muriel Zollman decided to study beginning Hebrew with Rabbi Sally Olins at Temple B’nai Hayim in Sherman Oaks a couple of years ago, it was only so she could follow the prayers during services ...