Mastering Blockchain Programming with Solidity

Questions

1. How big can a contract be in terms of code lines?
2. I have seen some contracts (deployed on etherscan.io) with their contract name being used for the function name, which is then used as the constructor of the contract. Why is this way of defining a constructor deprecated? 
3. When should fallback functions be used?
4. Is using a for or a while loop recommended?
5. How do you perform a complex search or filter operation in Solidity?
6. Can you add custom functions for default data types that are supported in Solidity?
7. Why has the throw keyword been removed from the Solidity language?