Regression testing aims to check program correctness even after it was modified. Whenever new features are added to an existing software system, the new features along with the existing features should be tested to ensure that their behaviors are not affected by the modifications. Regression test selection (RTS) techniques reduce the number of regression tests to execute using some selection criteria. Test Case Prioritization focuses on increasing the fault detection rate. A detailed survey on the various techniques, frameworks and metrics for efficient regression testing is presented.