Difference between exception to discharge in bankruptcy

Question

Please answer the following question:

Question 1: What is the difference between an Exception To Discharge in Bankruptcy and Objections To Discharge in Bankruptcy?

Question 2: Explain the concept of a reaffirmation agreement

Question 3: What is a debtor In Possession in a bankruptcy reorganization?

Question 4: Explain the concept of the "cram down" provisionin a bankruptcy reorganization?

Note: Provide support for rationale.