Free CBE Blockchain Use Cases & Applications Questions and Answers

Question 1

What is a smart contract in blockchain technology?

Accepted Answer

Self-executing program

Answer

A smart contract is a self-executing program stored directly on a blockchain. It automatically executes predefined actions and terms of an agreement when specific conditions are met, without the need for intermediaries. This ensures transparency, immutability, and trustless execution of agreements.

Question 2

Which blockchain platform is widely known for supporting smart contracts?

Accepted Answer

Ethereum

Answer

Ethereum is renowned for pioneering and widely supporting smart contract functionality. Unlike Bitcoin, which primarily focuses on peer-to-peer digital cash, Ethereum was designed as a platform for building decentralized applications (dApps) and executing complex, self-executing agreements through its smart contracts.

Question 3

Which programming language is primarily used to write Ethereum smart contracts?

Accepted Answer

Solidity

Answer

Solidity is the primary high-level, contract-oriented programming language specifically developed for writing smart contracts on the Ethereum blockchain. It is syntactically similar to JavaScript and is the most widely used language for creating decentralized applications (dApps) and their underlying logic within the Ethereum ecosystem.

Question 4

What defines a decentralized application (dApp)?

Accepted Answer

Runs on a blockchain and uses smart contracts

Answer

A decentralized application (dApp) is an application that runs on a decentralized peer-to-peer network, typically a blockchain, rather than a single centralized server. Its backend code is executed via smart contracts, ensuring transparency, immutability, and censorship resistance without a central authority.

Question 5

What is gas in the context of smart contracts?

Accepted Answer

Execution fee

Answer

In the context of smart contracts, 'gas' refers to the execution fee required to perform operations on the Ethereum blockchain. It is a unit that measures the computational effort needed to execute transactions or smart contract functions. Users pay gas fees in Ether to compensate miners for the resources consumed in processing and validating these operations.

CBE - Certified Blockchain Expert Practice Test

CBE - Certified Blockchain Expert Practice Test

Free CBE Blockchain Use Cases & Applications Questions and Answers