Quiz: Layer 2 Solutions and Scalability

Question 1: What is the primary goal of Layer 2 scaling solutions for Ethereum?

A. To replace the Ethereum mainnet B. To change Ethereum's consensus mechanism C. To increase the number of nodes in the network D. To enhance transaction throughput and reduce gas fees

Question 2: Which of the following is a Layer 2 scaling solution that bundles multiple transactions into a single compressed transaction before posting it to Ethereum?

A. Sharding B. Gas optimization C. Rollups D. Proof of Stake

Question 3: What are the two main types of rollups in Ethereum's Layer 2 solutions?

A. Optimistic Rollups and ZK-Rollups B. State Channels and Sidechains C. Plasma and Validium D. Sharding and Proof of Stake

Question 4: How do Optimistic Rollups assume transaction validity?

A. They do not verify transactions at all B. They assume transactions are valid by default and only check validity if challenged C. They require immediate proof for each transaction D. They use zero-knowledge proofs for validation

Question 5: What is a key feature of ZK-Rollups?

A. They delay transaction finality B. They do not compress transactions C. They rely on economic incentives for security D. They use zero-knowledge proofs to validate transactions

Question 6: Which Layer 2 solution allows users to conduct multiple off-chain transactions, submitting only the final state to the Ethereum mainnet?

A. State Channels B. Sidechains C. Plasma D. Rollups

Question 7: What is a primary benefit of using State Channels?

A. They reduce latency and transaction costs for frequent interactions B. They require each transaction to be recorded on-chain C. They are suitable for infrequent, high-value transactions D. They increase on-chain transaction fees

Question 8: How do Sidechains differ from other Layer 2 solutions?

A. They are directly secured by the Ethereum mainnet B. They operate independently with their own consensus mechanisms C. They do not require any form of consensus D. They cannot interact with the Ethereum mainnet

Question 9: What is a potential drawback of using Sidechains?

A. They offer limited scalability improvements B. They cannot support smart contracts C. They rely on the security of their own consensus mechanisms, which may be less robust than Ethereum's D. They increase transaction fees

Question 10: What is the main purpose of Plasma in Ethereum's Layer 2 scaling solutions?

A. To replace the Ethereum mainnet B. To increase the block size of Ethereum C. To eliminate the need for consensus mechanisms D. To create a framework for building scalable applications by offloading transactions to child chains

Question 11: What is a common challenge associated with Layer 2 solutions?

A. They can introduce additional complexity and potential security risks B. They always increase transaction fees C. They reduce the decentralization of the network D. They are incompatible with smart contracts