DeFi means decentralized Finance, maybe the interviewer should have ask him what decentralized Finance is instead of DeFi? Might sound confusing using DeFi? I personally don't know what DeFi was until I figured it out that it was shorten name of decentralized Finance, I bet he knows what that is.
No, I am quite certain that the interviewee knows what it is. I speculate that he simply did not want to acknowledge it because many if them are similar to scam ICOs of 2017.
The skeptical me thinks that some defi projects are created with backdoors and bugs by their own development teams to steal from their own users.
Early Sunday afternoon, reports started to spread via social media that a DeFi hack/attack took place.
Word first spread via Telegram, according to The Block’s Steven Zheng. An admin of a Telegram group noticed that there was an issue with Balancer, a DeFi protocol focused on facilitating token swaps.
“Apparently someone drained a Balancer Pool made up of WETH and STA and got away with $500k worth of WETH,” Zheng wrote, becoming one of the first to spread news of this via Twitter.
Hours after Zheng’s tweet, the attack was confirmed by Ethereum-based decentralized exchange 1inch and Mike McDonald, co-founder of Balancer Labs. Balancer Labs is the entity that is behind Balancer’s development; the former is a company, the latter is an Ethereum-based protocol.
Source https://www.newsbtc.com/2020/06/29/428843/
