Difficulty - Medium
Total Plays -
14
Allowed Time - 10 sec
Best time - 1.736 sec
Which pattern most directly reduces reentrancy risk on external transfers?
Tip: Click "Play" to reveal options and start playing.
#A
#B
#C
#D
Explanation:
The Checks-Effects-Interactions (CEI) pattern reduces reentrancy by making you validate inputs and update internal state before any external call (like ETH transfer or token transfer). If a malicious contract re-enters, state has already moved forward, limiting exploitability. Many interviewers treat CEI as a must-know Solidity security habit for production contracts
