LVS -LAYOUT VERSUS SHEMATIC TEST WHICH COMES IN THE 
STRACTURIAL DOMAIN IN WHICH WE WILL FIRST SHEMATIC THE 
CIRCUT AND AFTER BY USING TOOLS WE WILL MAKE THE LAYOUT BY 
COMAPARING THE BOTH THINGS JUST FOR SEEING WHEATHER ANY 
MISTAKES IS THERE OR NOT ...........IT IS TESTING PROCESS

DRC-DESIGN RULE CHECK THESE USEDE TESTING THE LAYOUT DESIGN 
AND FOR CHECKING THE CIRCUIT