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There are many things to learn in sharepoint .You can refer SharePOint SDK to learn .
Some few concepts you should know based on your exp.
1. Features , 2. Site Definition and Site templates 3. Client side object model
4. Business connectivity services . 5. New App model Development
6. Basic powershell scripts 7. Deployments and complete understading of CA (Central Admin site)
etc.
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thanx for helping me out to reach what i didnt know