QA is a planned and systematic set of activites nessary to 
provide the equal confidence that product. services will 
conform the specified requirements and meet unser needs
QA is process orianted , and it is defect prevention based

QC is tha process by which quality product is compared with 
the appilcable standards (expected standards) and action is 
taken when non conformance is detected.
QC is product oriented based and it is defect detection 
based


CM  is a standards and procedures for managing the version 
control of the  software product. it mainly deals with the 
version control , change made in project.

Quality assurance, or QA for short, is the activity of
providing evidence needed to establish quality in work, and
that activities that require good quality are being
performed effectively. All those planned or systematic
actions necessary to provide enough confidence that a
product or service will satisfy the given requirements for
quality.


Software Quality Control consists of a means of controlling
the quality of software engineering products. It does this
by means of tests of the software system. These tests can be
unit tests, integration tests, or system tests. It also
includes the formal proof of individual pieces of code, and
the review of documents and code.


Configuration Management is the control of changes,
including the recording thereof, that are made to the
hardware, software, firmware, and documentation throughout
the system lifecycle.
Configuration management is useful when developing new
version of softwares

Software quality assurane is a planned and organised pattern
of actions that are required to ensure quality in
software.It is completely associated with the defect prevention.

Quality control is a process in which product quality is
compared with applicable standards.It is completely
associated with the defect detection.

software configuration management is a discipline of
applying constructive views for discovering.coordinating and
controlling channges made to a software under development.

Well Quality Control is Detection and correction method
thats is error detection and correcting with some tools
Example Surgen , where he operates the body and detects 
whats wrong and corrects it and stiches.

Quality Assurance is Assuming whats going to happen if 
anything goes worng and be ready for whats going to happen 
in the future (Prevension)
ex. a doctor gives medicene for preventing the desece ..