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Lesson # 5
Public vs Private Chains + Interoperability Basics
Blockchain Basics
1. Which of the following is a key feature of public blockchains like Ethereum or Bitcoin?
A. Restricted access to validators
B. Open and permissionless participation
C. Only approved entities can send transactions
D. Transactions are hidden for privacy
2. What is the main purpose of a blockchain bridge?
A. To create new tokens
B. To transfer assets or data between different blockchains
C. To verify user identity
D. To speed up a single blockchain
3. Which interoperability protocol uses a “Relay Chain” and “Parachains” for built-in communication between networks?
A. Cosmos
B. Polkadot
C. LayerZero
D. Avalanche
4. What does IBC stand for in Cosmos, and what does it enable?
A. Inter-Blockchain Connection — automatic chain upgrades
B. Inter-Block Consensus — faster mining
C. Inter-Blockchain Communication — secure data and token transfers between Cosmos chains
D. Internal Blockchain Configuration — private node setup
5. What happens behind the scenes when you bridge a token from Ethereum to Avalanche?
A. Tokens are copied and sent directly
B. Original tokens are locked or burned on Ethereum, and new ones are minted or released on Avalanche
C. Tokens are sent to a central exchange for processing
D. The token is cloned on both chains