38:1 Then the LORD answered Job out of the whirlwind, and said,
38:7 When the morning stars sang together, and all the sons of God shouted for joy?
The Lord answered Job
The words of jehovah have the effect of bringing Job consciously into His presence. Job 42:5 . Hitherto the discussions have been about God, but He has been conceived as absent. Now Job and the Lord are face to face. It is noteworthy that Job does not answer Elihu. Despite his harsh judgment he has spoken so truly about God that Job remains silent. Job 38:1 might be paraphrased, "Then Jehovah answered for or on behalf of Job."
sons of God
(See Scofield "Hebrews 1:4") .