EVM and Ethereum Accounts

Question 1

Runtime environment for smart contracts in Ethereum is

Answer 1

similar to java runtime environment and benefits: can be run in any operating system (like Java)

Question 2

Completely isolated

Answer 2

codes in EVM can’t access network, filesystem, or other processes

Question 3

Smart contracts have only limited access.

Answer 3

to other smart cotracts on the same blockchain

Question 4

External accounts

Answer 4

controlled by public-private key pairs or humans

Question 5

Contract accounts

Answer 5

controlled by the code stored together with the account

Question 6

every account has

Answer 6

a persistent key-value store mapping of 256 bit words (32 bytes) to 256 but words called storage