ExtraStorage.sol inheritance of address

[Lavishq]

when ExtraStorage.sol is deployed and it imports as well as inherits SimpleStorage contract. But SimpleStorage.sol is not deployed then how does ExtraStorage communicate with that contract as there is no address.
https://www.youtube.com/watch?v=s1tw2zJJSqE

ps- I had this even when I did buildspace and learnweb3dao and was not able to get a proper answer. I had done till module 9 but I am doing this as revision on my part again and this time from chainlink channel so it is easier to do so. Thank for such an amazing course.

[alymurtazamemon]

@Lavishq ExtraStorage contract is inheriting the SimpleStorage contract and this way, all of the features it grabbing from the SimpleStorage contract. And if you deploy the parent contract all of the child contracts will be deployed and their features will be available in the deployed contract.

[Lavishq]

okay @alymurtazamemon , I understand something so let me rephrase it : we deploy child contract and parent contracts are deployed along with that and child will inherit all the accessible functions and variables.

But won't it increase gas this way ... if we deploy using interface and then pass the address via constructor then it will take less gas to deploy?

Thanks you for answering, I thought this could be the case but was unsure as there were ways where providing links and some ways had passing the address of deployed contract and it confused me.

[alymurtazamemon]

@Lavishq Passing contract address to another contract and then using that contract is a different thing than inheriting contracts.