I completed a Certificate II in Aircraft Line Maintenance while at school. Does this give me what I need for a Category A licence?

No. See the FAQ How do I know what Modules and MEAs I need for licence categories and/or exclusion removal? which outlines what is needed for a licence.The Units of Competency (“MEAs”) which should have been completed for a Certificate II in Aircraft Line Maintenance can count towards those required for a Category A licence. However, these alone do not meet the experience or examination requirements.

The scenario is similar to the FAQ What is a Diploma of Aeroskills and do I need it to get a licence?