computer security

a) Program Security defined by the textbook have two main objectives. What are these two objectives? b) Testing is one of many Developmental Controls for Program Security. There are different types of testing, briefly describe some of these types. There are also some problems with using testing as a control, briefly describe some of these problems. c) One technique you can use in a program to deal with errors is fault tolerance. Describe what that this, how it can help with some errors and also give an example of how to use it (4+4+4 p)