The Complete Solidity Course - Zero to Advanced for Blockchain and Smart Contracts - Visibility - Public Private Interna

The video tutorial explores the concepts of data access in smart contracts, focusing on public, private, and external function access. It demonstrates how changing a function's access level affects its visibility and interaction within a contract. The tutorial highlights the implications of these changes, such as the inability to call private functions from other functions and the restriction of external functions to be called only outside the contract. The video aims to enhance understanding of function scope and accessibility in smart contract development.

What happens to a function's accessibility when it is changed from public to private?

• It becomes inaccessible from both inside and outside the contract.

• It becomes accessible only to the contract owner.

• It becomes accessible only within the contract.

• It becomes accessible from outside the contract.

When a private function is called within another function, what is the effect on the data?

• The data is modified.

• The data remains unchanged.

• The data is deleted.

• The data is duplicated.

What is a key characteristic of an external function in a smart contract?

• It can modify the contract's state.

• It can only be called from outside the contract.

• It is accessible only to the contract owner.

• It can be called from within the contract.

Why might a compilation error occur when using an external function?

• The function is not accessible to the contract owner.

• The function modifies the contract's state.

• The function is called from within the contract.

• The function is not defined in the contract.

What is the result of calling an external function from within the same contract?

• A compilation error occurs.

• The function executes successfully.

• The function modifies the contract's state.

• The function returns a default value.