Answer the following questions from your lecture notes

1. What are the main security areas faced by a computer based system?
   List security controls to avoid each of these problems?
   

1. What are the types of validity checks that can be conducted on data input to a computer program?
   
   
2. List different ways of backing up a database.
   
   
3. List and describe the four classifications of maintenance. Which of these types of maintenance is likely to produce changes to user documentation?
   
   
4. S.C.&R. p.513, Discussion Topics 2 and 4.
   
   
5. S.C.&R. p.514, Apply Your Knowledge 1 Premium Publishers and 2 Oceanside Furniture.