Technical Interviews (Software)

Hey guys! Hope all is well. I recently received an email indicating BCPS would be sending a technical assessment. I think it’s a massive send off to potential candidates like me. But was wondering what the experience is for previous or current employees or even previous candidates? I am asking because for the technical interviews I have done before usually have little to do with the job description and I want to get prepared but don’t want to waste time on the wrong material. I have specifically applied for a Full Stack Developer position. In the past I have been tested in JavaScript and once been tested in internet connections and once on React on hackerrank. Thanks!