1 A300 Abu Nal S111 Primary key (F) Foreign TASK 4: Multiple Choice Questions: 1 Rashid updated customer data in one file location but forgot to do the update in another location. This is an example of data redundancy data concurrency data inconsistency a lack of data integrity Answer: C 2. The Etihad airline booking system will not allow two different customers to book the same seat at the same time. This is an example of data concurrency data isolation data inconsistency data redundancy Answer: A What type of file management system allows searching for data in random order? Sequential file organization Random file organization Direct file organization Relational file organization Answer: C Some companies use magnetic tape to store and access data. What file management system are they using? Sequential file organization Random file organization Direct file organization 4. Relational file organization Answer: A Which file management system limitation is present in the below table? Medicine Serial Number Model Quan 11100213 Baver Aspirin 15MED 20 11300213 Bayer Aspirin 16 AED 350 22900800 Nivea Skin Lotion 25 AD 22334000 Picer Aspirin SSAED Lack of data concurrency Lack of data security Data redundancy Data isolation Exercise-1: UNDERSTAND Based on what you understood in this unit, and using your research skills, answer the following questions: 1. What is a threat? 2. What is vulnerability? 3. What are the three components of the CIA. triad? What are they used for? 4. If the C.L.A. triad is incomplete, why is it so commonly used in security? 5. Describe the critical characteristics of information. How are they used in the study of computer security