Obviously God is the only one who can answer all questions, but He is not obligated to do so. Only God can adequately deal with the answers to all questions. We must succumb to trusting Him. He always knows best.
Unable to sense, experience, or discern the presence of God in the midst of his calamity, Job was confident God had not lost him and certain that at the completion of God’s plan Job would be purified. The best choice is to trust Him.