Quiz: Ethereum Smart Contract Development

Question 1: Which programming language is primarily used for writing Ethereum smart contracts?

A. JavaScript B. Python C. Solidity D. C++

Question 2: What is the file extension commonly used for Solidity files?

A. .sol B. .sld C. .eth D. .sc

Question 3: In Solidity, which keyword is used to define a contract?

A. class B. struct C. contract D. module

Question 4: What is the purpose of the pragma directive in Solidity?

A. To import external libraries B. To specify the compiler version C. To define a new data type D. To declare a variable

Question 5: Which of the following is a visibility modifier in Solidity?

A. public B. constant C. immutable D. indexed

Question 6: What is the function of the constructor in a Solidity contract?

A. To define the contract's fallback function B. To handle errors C. To destroy the contract D. To initialize state variables when the contract is deployed

Question 7: How can Ether be sent to a contract in Solidity?

A. By calling a function marked as payable B. By declaring a variable as payable C. By using the sendEther keyword D. By importing the Ether library

Question 8: What is the purpose of the require function in Solidity?

A. To revert the transaction if a condition is not met B. To log events C. To define a new contract D. To send Ether

Question 9: Which data type is used to represent addresses in Solidity?

A. string B. address C. uint256 D. bytes32

Question 10: What is an event in Solidity?

A. A function that can be called externally B. A state variable C. A type of loop D. A way to log data on the blockchain

Question 11: How can a contract inherit from another contract in Solidity?

A. Using the extends keyword B. Using the inherits keyword C. Using the : symbol D. Using the super keyword

Question 12: What is the purpose of the fallback function in Solidity?

A. To handle Ether sent to the contract without data B. To handle errors C. To initialize the contract D. To destroy the contract

Question 13: Which of the following is a loop structure in Solidity?

A. for B. foreach C. loop D. iterate

Question 14: What does the msg.sender represent in a Solidity function?

A. The address of the contract B. The address that called the function C. The amount of Ether sent D. The gas price of the transaction