Can someone tell me how to query the data which is displayed in " Monitor Bulk Data Load Jobs" Section "Completed last 7 days"
It seems the functionality is not exposed by Salesforce at all.
Those objects are not avialable in APEX. As I checked all Apex supported objects(with globalDescribe) and none of them have "750" as object prefix.
Also as far as I know the bulk API endpoints also do not support listing of the jobs. You only can access the jobs by providing JobId. Bulk API Walkthrough