# Caldera Galxe week1

**Published by:** [bitair3](https://paragraph.com/@bitair3/)
**Published on:** 2023-08-15
**URL:** https://paragraph.com/@bitair3/caldera-galxe-week1

## Content

Basic Question Question 1: What scalability framework does Caldera build on top of? A. Optimistic Rollups Question 2: In the context of rollups, what is a "batch"? B. A group of transactions bundled together Question 3: How do L2 rollups differ from L1 chains? D. L2 rollups process a batch of transactions off the main chain (L1) to reduce congestion and improve scalability, while L1 chains process all transactions directly on-chain. Question 4: What’s the difference between Optimistic vs. Zero-Knowledge Rollups? B. Optimistic Rollups require fraud proofs for validation, while Zero-Knowledge require a trusted setup and zk-SNARKs for validation which can be slower due to the complexity of their cryptographic proofs. Question 5: Which of the following is TRUE about monolithic, public blockchains? C. As more users onboard, transaction fees increase and efficiency slows Question 6: How do Caldera chains improve on the monolithic blockchain model? D. All of the above Question 7: What core service does Caldera provide? B. Deploying high-performance, customizable app-specific L2 app-specific rollups. Question 8: Where exactly does Caldera offer customizations? G. All of the above Question 9: What additional feature(s) do Caldera chains offer? E. All of the above Question 10: What is a settlement layer? B. It's the foundational layer of a blockchain where transactions are finalized and securely recorded. Question 11: What is a Data Availability (DA) layer? C. It's a layer in the blockchain protocol designed to ensure that block data is available to all participants, even if only a subset of participants store the full blockchain. Advanced Questions Question 1: What is an advantage of Caldera’s EVM-compatibility? A. Allows developers and users to interact with the blockchain and perform various actions, such as sending transactions, querying account balances, and more B. Provides compatibility with existing client libraries, such as Ethers.js, Web3.js, Web3.py and go's web3 library C. Both A & B Quiz: Advanced Questions Question 2: What programming tools & frameworks are compatible with Caldera? A. Hardhat B. Foundry C. Ethers.js & Web3.js D. All of the above Question 3: What rollup stacks are Caldera currently compatible with? B. OP Stack AND Arbitrum Orbit Question 4: True or False: Caldera chains offer custom precompiles? A. True Question 5: What types of applications can be built with Caldera chains? D. All of the above Question 6: What’s the goal of the built-in bridge on Caldera chains? Question 7: What is an Oracle? A. A third-party information source that supplies data to blockchains that cannot obtain it themselves, allowing smart contracts to interact with data outside their network. Question 8: What token is typically used for gas fee payment on any given chain? B. Usually the native token of the given chain (e.g., Ether for Ethereum) Question 9: What tokens do Caldera chains allow for gas fee payments? A. Any ERC-20 of the developer’s choice Question 10: Which of the following is the biggest advantage of custom gas fee tokens? C. It simplifies the user experience but also eliminates the need for users to hold multiple currencies Question 11: True or False: I want to build an app on Caldera! A. Yes!

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