What is the difference between QC and QA?

Quality assurance is the process where the documents for the product to be tested is verified with actual requirements of the customers. It includes inspection, auditing , code review , meeting etc. Quality control is the process where the product is actually executed and the expected behavior is verified by comparing with the actual behavior of the software under test. All the testing types like black box testing, white box testing comes under quality control. Quality assurance is done before quality control.