Aptitude is more important than both. People can have a lot of knowledge but without aptitude they can be unflexible and not learn new things. If you have aptit

Aptitude is more important than both. People can have a lot of knowledge but without aptitude they can be unflexible and not learn new things. If you have aptitude, you can gain knowledge quickly. Attitude to me is complex because it is general manners and politeness, which to me are mandatory, but it is also attitude to culture and people don't always fit. If you are wired to move fast and break things, you won't have the right "attitude" to work somewhere with high compliance requirements.