Question

2.

Answer 1

Answer:

b

Explanation:

Answer 2

Answer:

B. i < list.length

Explanation:

This question is terribly worded, but I assume the meaning is which answer will not result in an error if it's used in the while condition of the for loop.  The correct answer is b.  i < list.length is telling the loop to continue as long as the variable i is less than the length of the array list.

Answers C and D could potentially be valid under certain circumstances, but very unusual.  Answer A will give an error as list[list.length] will give an undefined value (assuming this is indeed javascript and not some other languge).