Local and State Variables, Scopes and Declarations

Question 1

state vaiables

Answer 1

reside on the blockchain

Question 2

local variables

Answer 2

only used when contracts are executed, don’t reside on the blockchain

Question 3

assignment of state vaiables to local variables are

Answer 3

copies for elementary. types (static types that fit into 32 bytes)

Question 4

references for structs or arrays

Answer 4

2nd assignment to the local variable only changes the reference and doesn’t modify the state variable

assignments to members of the local vaiable do change the state

Question 5

a declared variable has an initial default value of zero

Answer 5

statically sized arrays will be populated with zeros

dynamically-sized arrays, bytes and string, the. default value is an empty array or string