Instruct: Classify a given review into positive or negative sentiment.
Query: you wouldn't want a doctor learning this way.

Finding an error on page 3 re: an import command shook my confidence right off of the bat! It comes with a 'crib sheet' to memorize and do a brain suck on before you take the exam...pleeze don't pursue a Professional Certification this way. Buy something like Oracle Press - Couchman read it, understand it, build you biceps and be prepared for the exam and the job.