STRAYER UNIVERSITY

Enterprise Technology Process Models – CIS 521

Midterm Exam

Quarter: May 2007
Instructor: Prof. Mort Anvari (202) 294-4230 Morteza@Anvari.net
Class Web Site: http://www.anvari.net

1. How has the modern enterprise architectures changed from the early network solutions of the 1970s?

The modern enterprise architectures has changed from the early network solution in that the early solution followed by vertical, hierarchial approach versus the modern architectures that more horizontal and work peer to peer.

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2. List the functional views exist in enterprise architecture and explain the differences?

The list of functional views include: ➢ Business Goals and Business Logic ➢ Execution Services Like Interactive Logistics ➢ Nomadic Computing (Location Independent) capabilities ➢ Object-Oriented Solutions and Network Agents ➢ Intelligent Devices Assuring Most Basic Services

The main differences between each functional view that each includes a different level of sophistication.

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3. Why does the gap between the size of business challenges and the sophistication of technological solutions increase over time?

Answer: Because a large majority of senior managers and board members are computer illiterate, they have failed to realize that, as business challenges grow, the sophistication of computers, networks, databases, and software must also increase significantly.

Question 2: pg 113

4. What is the difference between an Enterprise Architecture and a Systems Architecture?

(Chap 2 p.26)

http://en.wikipedia.org/wiki/Enterprise_architecture

http://en.wikipedia.org/wiki/Systems_architecture

5. Describe how technology of ERP can benefit and can position an organization in a competitive environment? most of the time; therefore, it is more likely they are to get it wrong. This speed has a huge impact on the plant operations and its business, especially in the automobiles production. Likewise, this has important implications for the through speed of any other operation besides BMW. Yet, if the total time for the certain parts like ‘wheel steering’ to complete to the plant take several weeks to months, wheel steering are being processed through their first operation for a certain period of times consuming, before they reach at their final destination. The quantity of wheel steering being processed will determined by the forecasts for demand a month ahead. Almost certainly the plant at any time will make the wrong number of wheel steering because the forecast for a month ahead will be wrong.

Alternatively, consider the risk of making the wrong number of the Wheel Steering if, instead the company brought in the technologies which help the ERP to get the accurate part’s inventory, by upgrading to Intermec’s wireless scanning system. The system uses radio frequency (RF) technology, instead of the originally where BMW used Intermac bar code scanners attached to hard-wired data terminals at different locations on the plant floor to collect its inventory data. In the way, where parts would be scan when moved through the assembly process, in order to help the BMW’s planner, and its operation to track down the current status of all parts in production. The system ensures the scanner terminals transmit the data from the bar code reader to the SAP ERP via a wireless network that covers the entire 2-million-square-foot plant. ereafter, the wireless data collection networks will transmit its data collection through with supported by a circle flow of data travels system over interconnected wireless and wired network to most of BMW’s 6.Which of the following stateme nts is correct:

(A) Flat databases are preferable to relational databases because they do not waste computer storage
(B) Flat databases are preferable to relational databases because they do not force the user to keep information on items that logically cannot be available
(C) Flat databases are preferable to relational databases because they do not keep large sparse data full of missing information
(D) Flat databases are preferable to relational databases because they are conducive to complicated search queries that divide the database further
(E) None of the above ANSWER: E

7. Which of the following statements is not correct:

(A) In a relational database, all related data is stored as a record
(B) In a relational database a primary key is needed to identify the content of a record
(C) In relational databases it is often necessary to put facts not about the primary key in a separate table with a different primary key, because the facts in a table are about the primary key
(D) In relational databases for a given table its associated tables do not need pointers to indicate their linkage because the validation rules enforce all relationships
(E) In relational databases the primary key of any given table is always locally unique ANSWER:: D 8. Which of the following statements is incorrect
(A) Relational databases make life difficult for the designer of the database because many possible relationships must be anticipated
(B) Relational databases are normally considered hard to modify because adding new concepts involves adding new tables, not simply altering old ones
(C) Relational databases make life easy for the user because it is possible to avoid having to enter missing information for variables that are not logically possible
(D) Relational databases make life easy for the user data entry and data processing speeds are higher
(E) Relational databases make life easy for the user because data can be examined from many different perspectives ANSWER: B 9. Which of the following statements is the most accurate:
(A) In a relational database, tables need to be of the same size but they don't need to have a key column that connects them to each other and that uniquely defines the elements inside the table
(B) In a relational database, tables do not need to be of the same size but they all need to have a key column that connects them to each other and that uniquely defines the elements inside the table
(C) In a relational database, tables do not need to be of the same size and they don't need to have a key column that connects them to each other and that uniquely defines the elements inside the table
(D) A combination of A and C but not B
(E) A combination of both A and B but not C ANSWER: B 10. Which of the following statements is most accurate:
(A) One of the great advantages of flat tables is that you don't need a key
(B) One of the great advantages of flat tables is that you must have a composite key
(C) One of the great advantages of flat tables is that you need neither a composite key nor a simple key
(D) A combination of A and C but not B
(E) None of the above ANSWER: E
11. Which of the following statements is most accurate:
(A) Use of flat tables is strongly discouraged because there are no cases where they do a good job
(B) Use of flat tables is strongly discouraged because in all cases they do a good job
(C) Use of flat tables is strongly discouraged but for a small number of cases, flat databases do a reasonably fast job
(D) Use of flat tables is strongly discouraged because their widespread use would ruin the relational database business
(E) A combination of B and D ANSWER: C
12. With respect to the table below which of the following statements is most accurate:
|Student ID |
|First-Name |
|Last-Name |
|Address |
|Telephone-Number |

(A) The name of the data class (or Entity) is Patient
(B) The name of the data class (or Entity) is Patient and it has 5 attributes
(C) The name of the data class (or Entity) is Patient and it has 5 attributes, namely, Patient, First-Name, Last-Name, Addess and Telephone-Number
(D) The name of the data class (or Entity) is Patient and it has no attributes
(E) The name of the data class (or Entity) is Patient and it has 4 attributes
ANSWER:
14. The Figure shown below represents a graphical depiction of an information model. [pic]
Which of the following statements is most accurate:
(A) The information model contains three entities, namely, PERSON, FACILITY and PERSON, and in addition it shows that the entity ADMINISTRATOR has two attributes, namely, IT-Administrator and Hospital Administrator
(B) The information model contains four entities, namely, OBJECT-ITEM, PERSON, FACILITY and PERSON, and in addition it shows that the entity ADMINISTRATOR has two attributes, namely, IT Administrator and Hospital Administrator
(C) The information model contains eleven entities and ten subtype hierarchies
(D) The information model contains eleven entities and ten subtype ("is-a") hierarchies
(E) The information model contains eleven entities and the most generic data class shown is OBJECT-ITEM
ANSWER:
15. The Figure shown below represents a graphical depiction of an information model. Which of the following statements is most accurate:
[pic]
(A) The entity MEDICAL-FACILITY has four attributes, namely, HOSPITAL-FACILITY, MRI-FACILITY, ORTHODONTICS-FACILITY, BLOOD-LAB-FACILITY and ORTHOPEDICS-FACILITY
(B) The proper supertype of BLOOD-LAB-FACILITY is MEDICAL-FACILITY-ASSOCIATION, because it is above MEDICAL-FACILITY and the more general classes are always depicted above their specializations.
(C) The proper supertype of BLOOD-LAB-FACILITY is FACILITY, because it is above MEDICAL-FACILITY-ASSOCIATION and the more general classes are always depicted above their specializations.
(D) The information model is incomplete because it does not have a double associative entity for either FACILITY or OBJECT-ITEM
(E) None of the above ANSWER: E
16. With respect to the Figure shown in Question 15 ove and based on the materials covered in the course. Which of the following statements is most accurate:
A proper definition for MEDICAL-FACILITY-ASSOCIATION, is:
(A) A formal organization consisting of hospitals, radiology centers, orthodontists, orthopedics and serologists chartered under the laws of the state of Virginia.
(B) A formal organization chartered under the laws of the state of Virginia whose members are instances of HOSPITAL-FACILITY, MRI-FACILITY, ORTHODONTICS-FACILITY, BLOOD-LAB-FACILITY and ORTHOPEDICS-FACILITY .
(C) A relationship of an instance of HOSPITAL-FACILITY as the ordinate with another instance of MEDICAL-FACILITY as the subordinate that specifies a particular kind of dependence between them.
(D) A relationship of an instance of HOSPITAL-FACILITY as the ordinate with another instance of MRI-FACILITY as the subordinate that specifies a particular kind of dependence between them.
(E) A relationship of an instance of MEDICAL-FACILITY as the ordinate with another instance of MEDICAL-FACILITY as the subordinate that specifies a particular kind of dependence between them. ANSWER:
17. With respect to the Figure shown in Question 15 above and based on the materials covered in the course. Which of the following statements is most accurate:
A proper definition for OBJECT-ITEM, is:
(A) An OBJECT-ITEM of interest to Megahealth Corporation
(B) A thing. Basically, anything, as long as it can be identified with a card reader.
(C) A supertype. Its subtypes are PERSON, MATERIEL, and FACILITY
(D) An individually identifiable instance that forms an element of, or constitutes the subject matter of our medical system. Note: Instances of OBJECT-ITEM can be persons, facilities, or materiel.
(E) Either A or B but not C ANSWER:
18. ER Models are useful because they: a. Allow us to create efficient databases that are not full of logically missing data or require repetition of data in each record. b. Allow us to draw relationships between persistent data. c. Allow programmers to bypass database development using SQL code. d. A&B e. A only.

Answer: 19. Which of the following could be an entity in a clinical database: a. Physician b. Patient c. Department d. A only e. All of the above

Answer: 20. Primary keys are: a. Not required to be unique. b. All facts in the table are about the primary key. c. Are always required to be combination of at least two fields. d. All of the above e. None of the above

Answer: 21. Which of the following is correct: a. Attributes are characteristics of entities b. Once you have a primary key, all other attributes are useless. c. An entity can have many attributes with same name. d. All of the above.

Answer:

22. Good database design requires: a. Present data in the sequence collected so that it is convenient to use it. b. Non-key fields should be facts about the foreign key. c. Primary key should uniquely identify the individual occurrences of the entity or relationship d. A&B e. None of the above.

Answer: 23. When a table is in First Normal Form, (1NF): a. Fields consist of atomic data b. Fields are repeated in a row. c. A&B d. Both A&B e. None of the above

Answer: 24. If knowing Physician Name is enough for knowing Physician ID, then which one of the following statements is true: a. Physician Name is functionally dependent on Physician ID b. Both are functionally independent of each other c. Physician ID is functionally dependent on Physician Name d. Physician ID is the primary key e. A&D

Answer: 25. If the field, ‘Employee_Name’ is fully functionally dependent on the field ‘Employee_Number’ then which one of the following statements is not correct: a. Given an employee name we can find the employee number b. Given an employee number we can find the employee name c. A only d. A&B e. Neither A or B is correct.

Answer:

26. Query commands are written in which of the following languages: a. SQL b. C&* c. Oracle d. MS Access e. All of the above

Answer: 27. Queries are helpful in the following ways: a. They help us to quickly retrieve specific information from databases of any size and across many tables. b. They allow us to bypass normalization rules. c. B only d. They allow us to update, append and delete data. e. A&D

Answer: 28. Queries can be used to extract data about the following: a. People b. Places c. Tables d. Fields e. All of the above

Answer: 29. Querying a join relationship is advantageous because: a. SQL does not have a feature to query join relationships. b. This type of query can provide data about related fields in more than one table. c. Dependency between primary keys is broken. d. We can examine parents of a table. e. None of the above.

Answer:

30. The following tactic could be used to limit our search results to dates that occur only the year 2005. a. Providing a filter criterion in our query. b. Deleting all records in our database that occur in the year 2001. c. Removing all foreign key references. d. A&B e. None of the above. Answer: