Difficulty -
Medium
Total Plays -
19
Allowed Time - 10 sec
Best Time - 2.132
When does a fallback trigger?
#A
#B
#C
#D
Explanation:
The fallback() function runs when a transaction calls a non-existent function or sends data without matching any signature. It’s essential for proxy contracts but must be written carefully to avoid gas griefing and reentrancy risks.
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