Cryptohowtoeasy
- What is internal in Solidity?
- What is the point of a Solidity interface?
- What is internal function?
- What is require in Solidity?
- What is external in Solidity?
- What is constructor in Solidity?
- What is Solidity interface?
- What is delegate call in Solidity?
- What is abstract contract in Solidity?
- What is fallback function in Solidity?
- What is memory in Solidity?
- What is the difference between an internal function vs external function?
What is internal in Solidity?
internal :Those functions and state variables can only be accessed internally (i.e. from within the current contract or contracts deriving from it), without using this . private :Private functions and state variables are only visible for the contract they are defined in and not in derived contracts.
What is the point of a Solidity interface?
Interfaces are most useful in scenarios where your dapps require extensibility without introducing added complexity. Like abstract contracts they also help to remove code duplication and reduce overhead.
What is internal function?
An internal function definition is a function definition written within a program unit. All variables other than the parameters and data written in DATA statements are shared with the program unit. An internal function definition begins with FUNCTION line and ends with END FUNCTION Line.
What is require in Solidity?
The require Solidity function guarantees validity of conditions that cannot be detected before execution. It checks inputs , contract state variables and return values from calls to external contracts. ... When you target a codeless contract with an external function.
What is external in Solidity?
external − External functions are meant to be called by other contracts. They cannot be used for internal call. ... For public state variable, Solidity automatically creates a getter function. internal − Internal functions/ Variables can only be used internally or by derived contracts.
What is constructor in Solidity?
Constructor is a special function declared using constructor keyword. It is an optional funtion and is used to initialize state variables of a contract. ... A constructor code is executed once when a contract is created and it is used to initialize contract state.
What is Solidity interface?
An interface in Solidity behaves similarly to interface agreements in traditional object-oriented programming languages. In object-oriented programming an interface is a description of all functions that an object must have in order for it to operate.
What is delegate call in Solidity?
DelegateCall, as the name implies, is calling mechanism of how caller contract calls target contract function but when target contract executed its logic, the context is not on the user who execute caller contract but on caller contract.
What is abstract contract in Solidity?
Abstract contracts are contracts that have at least one function without its implementation. An instance of an abstract cannot be created. Abstract contracts are used as base contracts so that the child contract can inherit and utilize its functions.
What is fallback function in Solidity?
The solidity fallback function is executed if none of the other functions match the function identifier or no data was provided with the function call. Only one unnamed function can be assigned to a contract and it is executed whenever the contract receives plain Ether without any data.
What is memory in Solidity?
Much like RAM, Memory in Solidity is a temporary place to store data whereas Storage holds data between function calls. The Solidity Smart Contract can use any amount of memory during the execution but once the execution stops, the Memory is completely wiped off for the next execution. ... Function arguments are in memory.
What is the difference between an internal function vs external function?
A function that calls a function in the same contract is called an internal function. And a function that calls a function that's from a different smart contract is called an external function.
