Ethereum Gas Optimization Tools Quiz

1. What is the primary purpose of gas tools in the Ethereum ecosystem?

• To efficiently manage gas fees and optimize transaction costs.
• To create and deploy smart contracts effortlessly.
• To increase network speed and reduce latency.
• To enhance the visual interface of blockchain networks.

2. Which tool is known for its real-time tracking and analysis of gas prices across different blockchain networks?

• Moralis
• Etherscan
• Blocknative
• Tenderly

3. What is the name of the tool that provides a gas estimator for Ethereum transactions?

• Etherscan Tracker
• Blocknative Gas Estimator
• Tenderly Estimator
• Moralis Gas Monitor

4. Which tool is used for profiling gas usage in smart contracts?

• Truffle Suite
• Remix Studio
• Hardhat Network
• Tenderly Gas Profiler

5. What is the name of the platform that lists top gas tools for Web3 development?

• Uniswap
• Coinbase
• OpenSea
• Moralis

6. How do gas optimization techniques help in minimizing gas costs within smart contracts?

• By using specific coding patterns and optimizations.
• By avoiding the use of external libraries entirely.
• By increasing the number of transactions processed.
• By limiting the number of smart contracts created.

7. What is the difference between storage and computational costs in smart contract design?

• Storage costs are associated with transaction fees, while computational costs are linked to data retrieval.
• Storage costs indicate how many transactions can be processed, while computational costs reflect the size of the smart contract.
• Storage costs refer to the space required to store data, while computational costs refer to the resources needed to perform operations.
• Storage costs involve the resources needed to perform operations, while computational costs refer to the space required to store data.

8. How can you ensure accurate gas cost estimation before deploying a smart contract?

• By verifying gas costs only after the contract is live.
• By using reliable methods such as gas estimation tools and historical data analysis.
• By randomly guessing the gas prices based on previous experiences.
• By deploying the contract without any prior analysis.

9. What is the role of mappings in reducing gas costs in Solidity smart contracts?

• Mappings reduce gas costs by directly accessing data without needing to iterate through arrays.
• Mappings have no effect on gas costs as they work the same as arrays.
• Mappings increase gas costs by requiring more computations.
• Mappings reduce gas costs by storing data in multiple locations.

10. How do constants and immutable variables affect gas costs in Solidity smart contracts?

• They contribute to higher computational costs in smart contracts.
• They increase storage requirements, raising gas costs related to operations.
• They do not consume storage space, reducing gas costs associated with storage operations.
• They have no impact on gas costs within Solidity smart contracts.

11. What is the impact of using the `–optimize` option in the Solidity compiler on gas usage?

• It performs several hundred runs to streamline the code and significantly reduce gas usage.
• It optimizes gas fees for only external calls.
• It doubles the cost of all transactions made by the contract.
• It has no effect on gas usage and merely formats the code.

12. What is the average gas saving achieved by substituting arrays with mappings in Solidity smart contracts?

• 50% on average.
• 75% on average.
• 93% on average.
• 100% on average.

13. How does making a function external in Solidity affect gas efficiency?

• It allows accepting arrays from calldata, making it more gas-efficient when dealing with large arrays.
• It limits the amount of data that can be processed in transactions.
• It increases gas costs by requiring more computation on the blockchain.
• It has no effect on gas efficiency for external calls.

14. What is the impact of optimizing unused variables on gas usage in Solidity smart contracts?

• It increases gas costs by 0.3% per transaction.
• It saves approximately 0.3% gas units per call.
• It has no effect on gas usage at all.
• It saves around 1.5% gas units per function.

15. What is the primary benefit of using the Blocknative Gas Estimator?

• It increases block confirmation times.
• It offers discounts on transaction fees.
• It provides real-time gas price tracking and analysis.
• It automatically executes transactions.

16. How does the Tenderly Gas Profiler help in optimizing gas usage?

• It automates the deployment of gas-efficient smart contracts.
• It predicts future gas prices for transactions on the blockchain.
• It profiles gas usage in smart contracts to identify areas for optimization.
• It compiles smart contracts to reduce their initial gas costs.

17. What is the role of Etherscan in gas optimization?

• Etherscan
• Metamask
• Remix
• Infura

18. What are some common gas optimization techniques for Ethereum smart contracts?

• Increasing loop iterations for data access.
• Using mappings, constants, and immutable variables.
• Ignoring unused variables in code.
• Using dynamic arrays for all storage needs.

19. How does the use of mappings over arrays affect gas usage in Solidity?

• It increases gas costs by requiring more complex data structures.
• It has no impact on gas usage and performs the same as arrays.
• It uses more storage, thus leading to higher gas fees.
• It reduces gas usage by avoiding the need to iterate through all elements in an array.

20. What is the average gas saving achieved by using constants and immutable variables in Solidity smart contracts?

• 30%
• 70%
• 50%
• 10%

21. What is the impact of making a function external on gas efficiency in Solidity?

• It has no effect on gas efficiency in any case.
• It saves approximately 0.3% gas units per call by allowing the acceptance of arrays from calldata.
• It makes all function calls consume double the gas units.
• It increases gas costs by requiring more computation on large datasets.

22. How does the use of the `–optimize` option in the Solidity compiler streamline code and reduce gas usage?

• It simplifies the syntax of the code without changing its functionality.
• It compiles code in a single run to maximize efficiency and speed.
• It performs several hundred runs to streamline the code and significantly reduce gas usage.
• It adds additional checks to ensure code security and integrity.

23. What is the role of gas estimation tools in ensuring accurate gas cost estimation before deploying a smart contract?

• They only track historical gas prices without analysis.
• They are used solely for debugging smart contracts.
• They provide reliable methods for accurately estimating gas costs.
• They automate the deployment of smart contracts directly.

24. What is the primary benefit of using the Tenderly Gas Profiler in optimizing gas usage?

• It profiles gas usage in smart contracts to identify areas for optimization.
• It allows unlimited gas usage in transactions.
• It automatically lowers gas fees for every user.
• It reduces transaction speeds for all smart contracts.

25. How does the Blocknative Gas Estimator help in optimizing gas usage?

• It requires manual adjustments to gas limits for each transaction.
• It provides real-time gas price tracking and analysis.
• It generates random gas prices for better estimation.
• It allows for delayed transaction processing to save costs.

26. What are some common pitfalls in gas optimization that developers should avoid?

• Hardcoding values in contracts
• Increasing function complexity
• Using unnecessary loops
• Ignoring mapping types

27. What is the impact of using arrays versus mappings on gas usage in Solidity smart contracts?

• It requires more storage space, thus increasing gas costs.
• It reduces gas usage by avoiding the need to iterate through all elements in an array.
• It makes no difference in gas consumption at all.
• It increases gas usage due to extra complexity.

28. How does the use of constants and immutable variables affect gas costs in Solidity smart contracts?

• They require additional computations, increasing gas expenses.
• They increase execution speed but do not affect gas costs.
• They consume more resources than regular variables, raising costs.
• They do not consume storage space, reducing gas costs associated with storage operations.

29. What is the average gas saving achieved by optimizing unused variables in Solidity smart contracts?

• About 1.5% gas units per call.
• Roughly 5% gas units per call.
• Approximately 0.3% gas units per call.
• Around 10% gas units per call.

30. What is the primary benefit of using the `–optimize` option in the Solidity compiler?

• It performs several hundred runs to streamline the code and significantly reduce gas usage.
• It increases the size of the compiled contract and enhances security.
• It disables all optimizations and results in larger bytecode.
• It requires more memory during compilation, slowing down the process.