Creating/Deploying Contracts and Fallback Functions

Question 1

creating a contract from outside

Answer 1

mist, IDE: Remix (available in Mist), using web3.eth.Contract directly on geth

Question 2

Contracts can also be created inside other contracts

Answer 2

The source code of the created contract has to be known to the creator

Question 3

Constructor

Answer 3

a function with the same name as the contract

optional

will be executed (only once) when a contract is created

Question 4

a contract can have

Answer 4

at most one unnamed function

Question 5

this function is executed whenever

Answer 5

the contract receives plain Either (without data)