Oracle Certified Associate is considered to be an entry certification to Oracle Education. The people that are certified at this level are brand new to the Oracle education and probably have experience in the field of about 1 or 2 years. People that have achieved this level of experience without work-related experience are expected to have the minimum knowledge of the subject such as the basic fundamentals. They can be expected to perform some Oracle tasks with supervision.
An OCA is generally only required to pass at least 2 exams. There are typically no other requirements for this level of experience. OCA tests cover a wide variety of the basics of Oracle knowledge. The main goal for those that are on the OCA certification level is to know the basics and understand the features of the test and how they work. There can be minimal hands-on training with this method of study.