Official vendor resources plus CertStud practice materials for exam preparation.
Short answer: the OGEA-102 exam has about 8 questions in 90 minutes, with a passing score of 60%. Prepare with the official skills outline below, then work the 8 domains with the free study notes and OGEA-102 practice questions.
Follow the official OGEA-102 domain outline with CertStud notes and practice for each area.