In this verse the prophet proposeth a question to which no answer is given, but he doth immediately proceed to ask one more question, though somewhat, yet not much, different from the former, and in the answer of this latter question the prophet acquiesceth. The explication of this verse you have Malachi 4:3.
Related Commentaries of Zechariah 4:11
Zechariah 4:11
11 Then answered I, and said unto him, What are these two olive trees upon the right side of the candlestick and upon the left side thereof?