The Complete Solidity Course - Zero to Advanced for Blockchain and Smart Contracts - What are Abstract Contracts in Soli

The video tutorial explains abstract contracts, which contain at least one function without implementation, and their use as base contracts in inheritance. It contrasts regular and abstract contracts, demonstrating how to convert a regular contract into an abstract one by marking functions as virtual and the contract as abstract. The tutorial also covers the challenges of deploying abstract contracts and how derived contracts can override functions from base contracts.

What is an abstract contract and what is its significance?

Can an abstract contract contain both implemented and abstract functions? Explain.

What happens if a function in a contract has no implementation?

How do you mark a function without implementation in a contract?

What is the error message when trying to deploy an abstract contract?

How can you derive a contract from an abstract contract?

What is the purpose of the 'override' keyword in derived contracts?