🔒 Preview mode. The first 15 Foundations lessons are free; this one is Pro. Start a 7-day trial to unlock the editor, AI hints and the rest of the curriculum. Card required, cancel any time in Dashboard.Start 7-day trial →
📝 **Question:** Define abstract class \`Greeter\` with abstract method \`hello\`. Concrete subclass \`Hi\` returns \`"hi"\`. Print \`Hi().hello()\`.\nExpected: hi
📋 Pick the right answer.
💡 **Hint:** Re-read the theory above if unsure.
✏️ Write your code here
🐍
Loading Python...
One-time download (~1 MB). Then it runs instantly.