Which of the following enterprise blockchain platforms does not have smart contract functionality?
Answer(s): E
Ripple is a real-time gross settlement system (RTGS), currency exchange and remittance network by Ripple.
https://ripple.com/
You have flown to NYC to have a discussion with a technical executive of a too big to fail bank. You are having a discussion about blockchain algos and the customer is asking what are some disadvantages of using a POW algo?
Answer(s): C,E
The main disadvantages are huge expenditures, “uselessness” of computations and 51 percent attack. Reference: https://cointelegraph.com/explained/proof-of-work-explained
What are two reasons that you would consider implementing a POW algo in your blockchain? (Select two.)
Answer(s): B,C
The main benefits are the anti-DoS attacks defense and low impact of stake on mining possibilities. Defense from DoS attacks. PoW imposes some limits on actions in the network. They need a lot of efforts to be executed. Efficient attack requires a lot of computational power and a lot of time to do the calculations.Therefore, the attack is possible but kind of useless since the costs are too high. Mining possibilities. It doesn’t matter how much money you have in your wallet. What matters is to have large computational power to solve the puzzles and form new blocks. Thus, the holders of huge amounts of money are not in charge of making decisions for the entire network.
https://cointelegraph.com/explained/proof-of-work-explained
In Hyperledger Fabric, the smart contract logic is also called by two other names ____________and ____________? (Select two.)
http://hyperledger-fabric.readthedocs.io/en/release-1.1/Fabric-FAQ.html#endorsement
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