Hi,

As per my understanding:- 

QA: - Prevent the Bugs in any project / Product

QC: - Curing the Bugs in any project / Product

Please correct if I am wrong.

Regards,
N

the exact different between in QA and QC is

Qualty control:
QC is process oriented
Quality Control is related to a specific product or service
Quality Control verifies whether specific attribute are in, 
or are not in, a specific product or service
Quality Control identifies defects for the primary purpose 
of correcting defects
Quality Control is the responsibility of the team/worker
Quality Control is concerned with a specific product.

Qualiry assurance:
QA is product oriented
Quality Assurance is concerned with all of the products 
that will ever be produced by a process
Quality Assurance personnel should not ever perform Quality 
Control unless it is to validate Quality Control
Quality assurance is a system of management activities.
Quality assurance  (QA) is preventive process.
Quality assurance  (QA) applies to the entire life cycle

Qualtiy Assurance is the process in which each role is 
monitored and guided in such away that each and every task 
accomplished by him as per the guidelines defined by the 
Quality Standards

Quality Control is the process in which inspections and 
audits are conducted in order to segregate the bad process 
from the good one in order to obtain the Quality

Quality Assurance(QA) is Maintaining the quality within the 
process.

Quality Control(QC) is the actual part of Testing.Software 
Testing is part of QC.

QA is work-process oriented and helps in preventing for bug 
to occur.Audits are key technique used to perform product 
evaluation and process monitoring.



QC is work-product oriented and helps in detection i.e. 
finding bugs.Audits are key technique used top perform 
product evaluation

QA is a activity which can do before and in mid of software 
development

QC is a activity which can do only after the software has 
been released .

As per me 

QC is verifying quality as per the requirement. QC is reactive. 

QA is building confidence in the system such that quality
will be meet at the end. QA is proactive...