Skip to main content
City Hubs
Home
Ecosystem
NCEx
Learn
News
Governance
Loading...
Smart Contract Development
Energy
0 XP / 350
0%
Lesson 8 of 8
Quiz: Smart Contracts
Test your development knowledge
10 min
Question 1 of 4
What is a reentrancy attack?
A.
Guessing a private key
B.
An attacker calls back into a contract before it finishes executing
C.
Overflowing a number variable
D.
Sending too many transactions at once
Security Best Practices
Back to Course Overview