Official vendor resources plus CertStud practice materials for exam preparation.
Short answer: the OGEA-10B exam has about 14 questions in 60 minutes, with a passing score of 60%. Prepare with the official skills outline below, then work the 2 domains with the free study notes and OGEA-10B practice questions.
Follow the official OGEA-10B domain outline with CertStud notes and practice for each area.