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04/05/2026
Java quiz time 🔥
What is the main OOP principle?
A / B / C / D — which one is correct? 🤔
👇 Comment your answer
✔ Correct: B
💡 Encapsulation = data protection + structure
🔗 Full exam: https://skillcertify.org/exam/java-associate/easy?mode=exam
23/04/2026
SQL quiz time 🔥
What is a foreign key?
A / B / C / D — which one is correct? 🤔
👇 Comment your answer
✔ Correct: D
🔗 Full exam: link
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