intrebari middle

1. Oracle Database Software provides which of the following functionality? (Choose two) a. Graphical User Interface b. Internet Browserc. Server d. Operating System

2. The first step in system development is to document the requirements. Why? a. Wrong. A blueprint for the database design is not needed. We can just start coding

straight away.b. It clarifies what a business wants to accomplish, and provides measures for deciding if

the system delivers all that is required. c. It allows application development to be conducted without having to consider database

design.d. It keeps businesses honest.

3. The main subject areas taught by the Oracle Academy are: a. Computer Repairsb. Database performance tuning.c. Data Modeling, SQL and PL/SQL d. Systems programming and computer architecture

4. Consider your school library. It will have a database with transaction details of which student borrows which books. Is details of the total number of books out on loan in one given month Data or Information?

a. Datab. Information c. Bothd. Neither

5. Data modelling is performed for the following reasons: (Choose Two) a. The ERD’s becomes a blueprint for designing the actual system. b. It helps discussions and reviews. c. We do not need datamodels, we can just start coding right away.d. We just draw the ERD’s to please the users, once they are finished we never look at

them again. They serve no purpose in the real world.

6. Entity and Attribute names are always interchangable, so you need not worry about choosing the right type. True or False?

a. Trueb. False

7. All of the following would be instances of the entity ANIMAL SPECIES except which? a. Dogb. Birdc. Elephantd. Leaf

8. The entity/relationship model is created before the physical database design model? True or False?

a. True b. False

9. In a physical data model, a relationship is represented as a?

a. Columnb. Rowc. Instanced. Foreign Key

10. Volatile entities have special requirements and need special attention when you are doing data modelling. True or False?

a. True b. False

11. A/an _________ is a picture of all the information that will form the basis for the finished system.

a. ERD b. Processc. Tabled. Attribute

12. When reading an ERD including Relationships you are said to be speaking: a. Relationship-ishb. Gibberishc. ERDish d. Entity-ish

13. All the Attributes in a system are just written on the ERD, and they all go in the Top Left Hand Corner of the paper. True or False?

a. Trueb. False

14. A Matrix Diagram should be developed by your users. True or False? a. Trueb. False

15. Relationship Degree/Cardinality is important. True or False?a. True b. False

16. Relationship Names are optional. True or False? a. Trueb. False

17. A new system would have a mixture of both Procedural and Structural Business Rules as part of the documentation of that new system. True or False?

a. True b. False

18. The “Other” subtype is mandatory. True or False? a. Trueb. False

19. A supertype can only have two subtypes and no more. True or False? a. Trueb. False

20. You can only create relationships to a Supertype, not to a Subtype. True or False?

a. Trueb. False

21. A Supertype can have only one subtype. True or False?a. Trueb. False

22. When creating entities you must follow these rules: (Choose Two) a. Name them in Pluralb. Name them in Singular c. Exclude Attributesd. Include Attributes

23. If a relationship can NOT be moved between instances of the entities it connects, it is said to be:

a. Mandatoryb. Optionalc. Transferrabled. Non-Transferrable

24. Which of the following pairs of entities is most likely to be modeled as a M:M relationship?

a. CAR and WHEELb. TREE and BRANCHc. PERSON and FINGERPRINTd. TEACHER and SUBJECT AREA

25. If two entities have two relationships between them, these relationships can be either _____________ or _____________ ?

a. Redundant or Required b. Replicated or Requiredc. Resourced and Really Goodd. Redundant and Replicated

26. What uncommon relationship is described by the statements: “Each DNA SAMPLE may be taken from one and only one PERSON and each PERSON may provide one and only one DNA SAMPLE”

a. One to Many Optionalb. One to Many Mandatoryc. One to One Optional d. Many to Many Mandatory

27. How do you include a relationship as part of the UID for an entity? a. By barring the relationship in question b. By reporting it in an external documentc. By including the UID from the parent entity as an attribute in the entityd. You cannot model that.

28. When you resolve a M-M you simply re-draw the relationships between the two original entities, no new entities are created. True or False?

a. Trueb. False

29. Intersection Entities often have the relationships participating in the UID, so the relationships are often barred. True or False?

a. True b. False

30. What do you call the entity created when you resolve a M:M relationship?a. Intersection entity b. Inclusion entityc. Recursive entityd. M:M entity

31. When is an entity in 2nd Normal Form? a. When all non-UID attributes are dependent upon the entire UID. b. When no attritibutes are mutually independant and fully independent on the primary

key.c. When no attritibutes are mutually independent and all are fully dependent on the

primary key.d. None of the Above.

32. All entities must be given a new artificial UID. True or False? a. Trueb. False

33. There is no limit to how may UID’s an entity can have. True or False? a. True b. False

34. Normalizing an Entity to 1st Normal Form is done by removing repeated or redundant attributes. True or False?

a. True b. False

35. No commercial database systems in the world will accept tables that are not on 3rd Normal Form. True or False?

a. Trueb. False

36. If Audit trail attributes are added to an entity they must be in the entities they are auditing. True or False?

a. True b. False

37. Which of the following would be good as a Unique Identifier for its Entity? (Choose Three)

a. Personal Identification number for Person b. Vehicle Registration Number for Car c. ISBN Number for Book d. Date of birth for Baby

38. No parts of an UID are mandatory. True or False? a. Trueb. False

39. Primary UIDs are:

a. Something that each Entity should have, but is not mandatory b. Useful as an alternative means of identifying instances of an entity, independent of

their datatypec. Mandatory in data modelingd. Always comprised of numbers

40. Arcs are Mandatory in Data modeling. All ERD’s must have at least one Arc. True or False?

a. Trueb. False

41. All relationships participating in an arc must be mandatory. True or False? a. Trueb. False

42. An arc can also be modeled as Supertype and Subtypes. True or False?a. True b. False

43. Modeling historical data is Optional. True or False? a. True b. False

44. When you add the concept of time to your data model, your model becomes more complex. True or False?

a. True b. False

45. Which of the following is a logical constraint that could result from considering how time impacts an example of data storage?

a. An ASSIGNMENT may only refer to an EMPLOYEE with a valid employee record at the Start Date of the ASSIGNMENT.

b. EMPLOYEE periods can overlap causing the database to crash.c. End Date must be before the Start Date.d. Dates must be stored with Time.

46. All systems must include functionality to provide logging or journaling in conceptual data models. True or False?

a. Trueb. False

47. All datamodels must be transformed from specific to generic. True or False? a. Trueb. False

48. A datamodel containing generic modeling techniques must not be mixed in with non-generic models. The generic entities MUST be drawn on a diagram of their own. True or False?

a. Trueb. False

49. There is no point in trying to group your entities together on your diagram according to volume. Making a diagram pretty is a waste of time. True or False?

a. True

b. False

50. Which of the following statements are true for ERD’s to enhance their readability. (Choose Two)

a. Is is OK to break a big ERD down into subsets of the overall picture. This way you end up with more than one ERD, that together documents the entire system.

b. Try to avoid crossing lines c. The crows feet (many ends) can point whichever way is the easiest to drawd. You must ensure you have all the entities on one single, big diagram, even if you have

hundreds

Varianta 2

1. Entities are transformed into Tables during the Database Design process. True or False? a. True b. False

2. Oracle Database Software provides which of the following functionality? (Choose two) a. Graphical User Interface b. Internet Browserc. Server d. Operating System



4. The main subject areas taught by the Oracle Academy are: a. Computer Repairsb. Database performance tuning.c. Data Modeling, SQL and PL/SQL d. Systems programming and computer architecture

5. Data modelling is performed for the following reasons: (Choose Two) a. The ERD’s becomes a blueprint for designing the actual system. b. It helps discussions and reviews. c. We do not need datamodels, we can just start coding right away.d. We just draw the ERD’s to please the users, once they are finished we never look at

them again. They serve no purpose in the real world.

6. Entity Relationship modeling is dependent on the hardware or software used for implementation, so you will need to change your ERD if you decide to change Hardware Vendor. True or False?

a. Trueb. False

7. All of the following could be attributes of an ENTITY called PERSON except one. Select the incorrect one:

a. Haircolorb. Weight

c. Genderd. Natacha Hansen

8. Which of the following statements about relationships are true? (Choose Twoa. They become foreign keys in the database. b. They must be mandatory to be created in the database.c. They can be either mandatory or optional. d. They must exist between two different Entities.


a. True b. False


11. An entity is instantiated as a ? a. Experienceb. Instancec. Table d. None of the above

12. Relationship Degree/Cardinality is important. True or False? a. True b. False

13. Which of the following are valid relationship degrees? (Choose two) a. 1:1 b. 1:M c. 1:Od. O:O

14. Matrix Diagrams are mandatory when doing data modelling. True or False? a. Trueb. False


16. Entity names are always singular. True or False? a. True b. False


a. True b. False

18. When creating entities you must follow these rules: (Choose Two)

a. Name them in Pluralb. Name them in Singular c. Exclude Attributesd. Include Attributes

19. You can only create relationships to a Supertype, not to a Subtype. True or False? a. Trueb. False

20. All ER diagrams must have one of each of the following: (Choose two) a. One or more Entities b. Relationships between entities c. Arcsd. At least one supertype and subtype


22. A Supertype can have only one subtype. True or False? a. Trueb. False

23. Intersection Entities are at the Master end in the relationships between it and the original entities. So the original entities are details or children of the newly created intersection entity. True or False?

a. Trueb. False


a. Trueb. False


a. True b. False

26. If a relationship can NOT be moved between instances of the entities it connects, it is said to be:

a. Mandatoryb. Optionalc. Transferrabled. Non-Transferrable


a. One to Many Optionalb. One to Many Mandatoryc. One to One Optional d. Many to Many Mandatory


29. Many to many relationships must be left in the Model. It is important to have them documented as M-M. True or False?

a. Trueb. False



31. The first UID for an entity is called the Primary UID, the second is called Secondary UID and so on.

a. Yes, this is the way UID’s are named. b. No, it is not possible to have more than one UID for an Entity.c. Yes, but then it stops. No entities can have more than two UID’s.d. No, each Entity can only have one UID, the secondary one.


33. As a database designer you do not need to worry about where in the datamodel you store a particular attribute, as long as you get it onto the ERD your job is done. True or False?

a. Trueb. False

34. Would it be a good idea to model age as an attribute of STUDENT? a. Yesb. Maybe it could stop us having to calculate someone’s age every time we need itc. Sometimesd. No – it breaks the Normalization rules

35. Until all attributes are single-valued, the database model is said to be: 1. Normalized2. Not Normalized 3. 1st Normal Form4. 2nd Normal Form

36. Primary UIDs are: 1. Something that each Entity should have, but is not mandatory 2. Useful as an alternative means of identifying instances of an entity, independent of

their datatype3. Mandatory in data modeling4. Always comprised of numbers

37. Which of the following is NOT a relationship type?

1. Some to None 2. One to One3. One to Many4. Many to Many

38. No parts of an UID are mandatory. True or False? 1. True2. False

39. Which of the following would best be represented by an arc? 1. TEACHER (Female, Bob)2. DELIVERY ADDRESS (Home, Office) 3. PARENT (Girl, Bob)4. STUDENT (Grade A student, Average Student)


1. True2. False

41. Historical data must never be kept. True or False? 1. True2. False

42. A recursive relationship must Mandatory at both ends. True or False? 1. True2. False

43. If a system includes the concept of time and it stores Start Dates, then End Dates becomes Mandatory. For each Start Date attribute you create, you MUST create an End Date attribute and it must be mandatory. True or False?

1. True2. False

44. All systems must have an entity called WEEK with a holiday attribute, so you know when to give your employees a holiday. True or False?

1. True2. False


1. True2. False

46. Which of the following is a logical constraint that could result from considering how time impacts an example of data storage?

1. An ASSIGNMENT may only refer to an EMPLOYEE with a valid employee record at the Start Date of the ASSIGNMENT.

2. EMPLOYEE periods can overlap causing the database to crash.3. End Date must be before the Start Date.4. Dates must be stored with Time.

47. All datamodels must be transformed from specific to generic. True or False? 1. True2. False

48. Generic models are generally far more complex than a specific model. True or False?

1. True2. False

49. There are formal rules for how to draw ERD’s, even though they are only guidelines, you should always try to follow them. True or False?

1. True 2. False

50. There is no point in trying to group your entities together on your diagram according to volume. Making a diagram pretty is a waste of time. True or False?

1. True2. False

Varianta 31. Oracle Database Software provides which of the following functionality? (Choose two)

a. Graphical User Interface b. Internet Browserc. Server d. Operating System

2. The market for IT professionals is still increasing and will continue to do so in the future, as the world gets ever more dependent on computer systems. True or False? True False

3. Information which was gained from data is the same as: (Choose Two) a. Knowledge b. Raw Materialsc. Intelligence d. There is no difference between data and information.

4. Entities are transformed into Tables during the Database Design process. True or False? a. True b. False

5. Entity and Attribute names are always interchangable, so you need not worry about choosing the right type. True or False?

a. Trueb. False

6. An entity can have many Unique Identifiers. True or False? a. True b. False


a. Haircolorb. Weightc. Genderd. Natacha Hansen

8. Which of the following statements about relationships are true? (Choose Two) a. They become foreign keys in the database. b. They must be mandatory to be created in the database.c. They can be either mandatory or optional. d. They must exist between two different Entities.



10. An entity is instantiated as a ? a. Experienceb. Instancec. Table d. None of the above

11. Documenting Business Requirements helps developers control the scope of the systems, so users do not suddenly want the new system to contain twice as much functionality. True or False?

a. True b. False

12. When reading a relationship between 2 entities, the relationship is read both from left to right and right to left. True or False?

a. True b. False


14. Relationships represents something of significance to the business. True or False? a. True b. False


a. Trueb. False


17. A Supertype can have only one subtype. True or False? a. Trueb. False



20. Which of the following is true about subtypes? a. One instance may belong to two subtypes of the same supertype.b. Subtypes must be mutually exclusive. c. Subtypes must not be mutually exclusive.d. Subtype entities may not have relationships to the other subtype entities, only the

supertype itself.


22. Business rules are important to data modelers. True or False? a. True b. False

23. Transferable relationships can only be mandatory, not optional. True or False? a. Trueb. False

24. A relationship from an entity back to itself is called a ___________ relationship. a. Mandatoryb. Recursive c. Many to Many Optionald. Transferrable


a. Trueb. False

26. Relationships can be Redundant. True or False? a. True b. False



a. True b. False


a. Trueb. False

30. What do you call the entity created when you resolve a M:M relationship? a. Intersection entity b. Inclusion entityc. Recursive entityd. M:M entity

31. Normalizing an Entity to 1st Normal Form is done by removing repeated or redundant attributes. True or False?

a. True b. False

32. No commercial database systems in the world will accept tables that are not on 3rd Normal Form. True or False?

a. Trueb. False

33. Would it be a good idea to model age as an attribute of STUDENT? a. Yesb. Maybe it could stop us having to calculate someone’s age every time we need itc. Sometimesd. No – it breaks the Normalization rules

34. All entities must be given a new artificial UID. True or False? a. Trueb. False


36. A relationship can be both Recursive and Hierachal at the same time. True or False? a. Trueb. False

37. Modeling historical data can produce a unique identifier that always excludes dates. True or False?

a. Trueb. False


a. Trueb. False

39. Primary UIDs are: a. Something that each Entity should have, but is not mandatory b. Useful as an alternative means of identifying instances of an entity, independent of

their datatypec. Mandatory in data modelingd. Always comprised of numbers


41. Arcs are used to visually represent _________ between two or more relationships in an ERD.

a. Samenessb. Differencesc. Exclusivity d. Inheritance

42. Which of the following would best be represented by an arc? a. TEACHER (Female, Bob)b. DELIVERY ADDRESS (Home, Office) c. PARENT (Girl, Bob)d. STUDENT (Grade A student, Average Student)

43. You are doing a data model for a computer sales company, where the price of postage is dependent on what day of the week goods are shipped. So shipping is more expensive if the customer wants a delivery to take place on a Saturday or Sunday. What would be the best way to model this?

a. Use a Delivery Day entity, which holds prices against week days, and ensure the we also have an attribute for the Requested Delivery Day in the Order Entity.

b. Email current price to all employees whenever the prices change.c. Update the prices in the system, print out the current prices when they change and pin

them on the company noticeboardd. Allow them to enter whatever ever delivery charge they want.


a. Trueb. False


46. If a system includes the concept of time and it stores Start Dates, then End Dates becomes Mandatory. For each Start Date attribute you create, you MUST create an End Date attribute and it must be mandatory. True or False?

a. Trueb. False

47. There are formal rules for how to draw ERD’s, even though they are only guidelines, you should always try to follow them. True or False?

a. True b. False

48. Which of the following statements are true for ERD’s to enhance their readability. (Choose Two)

a. Is is OK to break a big ERD down into subsets of the overall picture. This way you end up with more than one ERD, that together documents the entire system.

b. Try to avoid crossing lines c. The crows feet (many ends) can point whichever way is the easiest to draw

d. You must ensure you have all the entities on one single, big diagram, even if you have hundreds

49. A datamodel containing generic modeling techniques must not be mixed in with non-generic models. The generic entities MUST be drawn on a diagram of their own. True or False?

a. Trueb. False

50. All datamodels must be transformed from specific to generic. True or False? a. Trueb. False

Varianta 41. The market for IT professionals is still increasing and will continue to do so in the future, as the world gets ever more dependent on computer systems. True or False?

a. True b. False

2. Consider your school library. It will have a database with transaction details of which student borrows which books. Is a record of one student borrowing one book Data or Information?

a. Data b. Informationc. Bothd. Neither

3. Information which was gained from data is the same as: (Choose Two)

a. Knowledge b. Raw Materialsc. Intelligence d. There is no difference between data and information.

4. Databases are used in most countries and by most governments. Life, as we know it, would change drastically if we no longer had access to databases. True or False?

a. True b. False

5. Oracle Database Software provides which of the following functionality? (Choose two) a. Graphical User Interface b. Internet Browserc. Server d. Operating Systems

6. Which of the following are types of databases? (Choose two)a. Hierarchical b. Relational c. SQLd. Network

7. In a physical data model, a relationship is represented as a? a. Columnb. Row

c. Instanced. Foreign Key

8. All of the following are examples of ENTITY: Instance except two. Select the answers that are ENTITY: Instance. (Choose Two)

a. TRANSPORTATION METHOD: Car b. ANIMAL: Dog c. MEAT PRODUCT: Lettuced. BODY PART: Larry Ellison

9. Relationship names are usually verbs. True or False? a. True b. False


11. Primary Unique Identifiers… (Choose Two) a. Are Required. The data model is not complete until all entities have a Primary UID. b. Distinguish each instance of an entity from all others c. Are not requiredd. You may create more than one Primary Unique Identifier for an entity

12. The entity/relationship model is created before the physical database design model. True or False?

a. True b. False


14. Relationship Names are optional. True or False?a. Trueb. False

15. Which of the following are valid relationship degrees? (Choose two)

a. 1:1 b. 1:M c. 1:Od. O:O

16. Entity Boxes are drawn with 90 degree angles, also known as Hard Boxes. True or False? a. Trueb. False

17. To identify an attribute as part of a unique identifier on an ER diagram, the # symbol goes in front of it. True or False?

a. True b. False



20. All instances of a subtypes may be an instance of the supertype but does not have to. True or False?

a. Trueb. False



23. Which of the following are suitable Entity names? (Choose Two) a. DOGSb. ANIMAL c. ANIMALSd. DOG

24. “Only teachers may supervise exams” is an example of which of the following? a. A procedural business rule b. An attribute that should be stored on the PERSON entityc. A structural business ruled. An attribute that is not be inherited from the PERSON supertype and is unique to the

TEACHER subtype

25. A business rule such as “We only ship goods after customers have completely paid any outstanding balances on their account” is best enforced by:

a. Making the payment attribute null.b. Making the payment attribute optional.c. We need to trust our customers, and we know they will pay some day.d. Hiring a programmer to create additional programming code to verify no goods are

shipped until the account has been settled in full.


a. True b. False

27. Why is it important to identify and document structural rules? a. Ensures we know what data to store and how that data works together.

b. Ensures nothing. There is no benefits to be gained from documenting your Structural Business Rules. We need to concentrate on the Procedural Business Rules only.

c. Ensures we know what Information to store and how that Information works together.All of the Above.

28. A Diamond on a relationship indicates the Relationship as Non-Tranferrable. True or False?

a. True b. False






a. Trueb. False

33. All entities must be given a new artificial UID. True or False?a. Trueb. False

34. An entity without repeated values is said to be on 1st Normal Form. True or False? a. True b. False

35. When is an entity in 2nd Normal Form? a. When all non-UID attributes are dependent upon the entire UID. b. When no attritibutes are mutually independant and fully independent on the primary

key.c. When no attritibutes are mutually independent and all are fully dependent on the

primary key.d. None of the Above.

36. Consider the entity ADDRESS with the attributes:ADDRESS:# House Number* Street* Town* City

* Year of Buildo City PopulationThis entity is NOT in 3rd Normal Form (“no non-UID attribute can be dependent on another non-UID attribute). True or False?

a. True b. False

37. An arc can be modelled as Supertype and Subtypes. True or False? a. True b. False

38. No parts of a UID are mandatory. True or False? a. Trueb. False

39. Which of the following is NOT a relationship type? a. Some to None b. One to Onec. One to Manyd. Many to Many


41. Which of the following would be good as a Unique Identifier for its Entity? (Choose Three)

a. Personal Identification number for Person b. Vehicle Registration Number for Car c. ISBN Number for Book d. Date of birth for Baby

42. Historical data must never be kept. True or False? a. Trueb. False

43. Database Design projects must use Consultants or they will fail. True or False? a. Trueb. False

44. Which of the following are NOT valid techniques for effective public speaking? (Choose Two)

a. Whispering b. Using specialist language and technical abbreviations when communicating technical

information c. Being enthusiasticd. All of the Above

45. All systems must have an entity called WEEK with a holiday attribute, so you know when to give your employees a holiday. True or False?

a. Trueb. False


47. If a system includes the concept of time, and it stores Start Dates, then End Dates becomes Mandatory. For each Start Date attribute you create, you MUST create an End Date attribute and it must be mandatory. True or False?

a. Trueb. False

48. When you add the concept of time to your data model, your model becomes more complex. True or False?

a. True b. False

49. Which of the following is a logical constraint, that could result from considering how time impacts data storage?

a. An ASSIGNMENT may only refer to an EMPLOYEE with a valid employee record at the Start Date of the ASSIGNMENT.

b. EMPLOYEE periods can overlap causing the database to crash.c. End Date must be before the Start Date.d. Dates must be stored with Time.

50. You are doing a data model for a computer sales company, where the price of postage is dependant on what day of the week goods are shipped. So shipping is more expensive if the customer wants a delivery to take place on a Saturday or Sunday. What would be the best way to model this?

a. Use a Delivery Day entity, which holds prices against week days, and ensure the we also have an attribute for the Requested Delivery Day in the Order Entity.

b. Email current price to all employees whenever the prices change.c. Update the prices in the system, print out the current prices when they change and pin

them on the company noticeboardd. Allow them to enter whatever delivery charge they want.

Varianta 51. The main subject areas taught by the Oracle Academy are:

a. Computer Repairsb. Database performance tuning.c. Data Modeling, SQL and PL/SQL d. Systems programming and computer architecture



3. Information which was gained from data is the same as: (Choose Two)

a. Knowledge b. Raw Materialsc. Intelligence d. There is no difference between data and information.

4. Entities are transformed into Tables during the Database Design process? True or False? a. True b. False

5. Databases were invented in 1989. True or False? a. Trueb. False

6. Databases perform these functions…. a. Running multiple applications on multiple client-serversb. Providing integrated software on fast processing serversc. Providing software running on a variety of platforms and configurations allowing

companies a structured way to access and manage their data d. They run purely as client-based software on personal computers


a. Haircolorb. Weightc. Genderd. Natacha Hansen

8. All of the following are examples of ENTITY: Instance except two. Select the answers that are ENTITY: Instance. (Choose Two)

a. TRANSPORTATION METHOD: Car b. ANIMAL: Dog c. MEAT PRODUCT: Lettuced. BODY PART: Larry Ellison

9. Primary Unique Identifiers… (Choose Two) a. Are Required. The data model is not complete until all entities have a Primary UID. b. Distinguish each instance of an entity from all others c. Are not requiredd. You may create more than one Primary Unique Identifier for an entity





a. True b. False

13. Which of the following statements about relationships are true? (Choose Two) a. They become Foreign Keys in the database. b. They Must be Mandatory to be created in the database.c. They can be either mandatory or optional. d. They must exist between two different Entities.


15. In a business that sells pet food choose the best relationship name between FOOD TYPE and ANIMAL (e.g. dog, horse or cat). (Choose Two)

a. Each FOOD TYPE must be suitable for one or more ANIMALs. b. Each ANIMAL must be the seller of one or more FOOD TYPES.c. Each FOOD TYPE may be made from one or more ANIMALs.d. Each FOOD TYPE may be given to one or more ANIMALs.

16. Entity names are always singular. True or False? a. True b. False


a. Trueb. False


19. All instances of the supertype must be an instance of one of the subtypes. True or False? a. True b. False

20. When creating entities you must follow these rules: (Choose Two)

a. Name them in Pluralb. Name them in Singular c. Exclude Attributesd. Include Attributes

21. All instances of a subtypes may be an instance of the supertype but does not have to. True or False?

a. Trueb. False


23. All ER diagrams must have one of each of the following: (Choose two)

a. One or more Entities b. Relationships between entities c. Arcsd. At least one supertype and subtype

24. Can all constraints be modeled on an ER diagram? a. No, in which case you should let the database administrator handle themb. No, but you just explain them to the users so they can enforce themc. Yes, all constraints must be modeled and shown on the ER diagramd. No, so you should list them on a separate document to be handled programmatically


a. True b. False

26. Why is it important to identify and document structural rules? a. Ensures we know what data to store and how that data works together. b. Ensures nothing. There is no benefits to be gained from documenting your Structural

Business Rules. We need to concentrate on the Procedural Business Rules only.c. Ensures we know what Information to store and how that Information works together.d. All of the Above.

27. Business rules are important to data modelers. True or False? a. True b. False

28. A Diamond on a relationship indicates the Relationship as Non-Tranferrable. True or False?

a. True b. False





a. One to Many Optionalb. One to Many Mandatory

c. One to One Optional d. Many to Many Mandatory

32. If two entities have two relationships between them, these relationships can be either __________ or __________?

a. Redundant or Required b. Replicated or Requiredc. Resourced and Really Goodd. Redundant and Replicated

33. All entities must be given a new artificial UID. True or False?a. Trueb. False

34. When data is stored in one place in a database, the database conforms to the rules of ___________.

a. Normalityb. Reductionc. Normalization d. Multiplication

35. Would it be a good idea to model age as an attribute of STUDENT a. Yesb. Maybe it could stop us having to calculate someones age every time we need itc. Sometimesd. No – it breaks the Normalization rules

36. Which of the following is NOT a relationship type? a. Some to None b. One to Onec. One to Manyd. Many to Many

37. Consider the entity ADDRESS with the attributes:ADDRESS:# House Number* Street* Town* City* Year of Buildo City Population

This entity is NOT in 3rd Normal Form (“no non-UID attribute can be dependent on another non-UID attribute). True or False?

a. True b. False

38. Which of the following would best be represented by an arc? TEACHER (Female, Bob)DELIVERY ADDRESS ( Home, Office) PARENT (Girl, Bob)STUDENT (Grade A student, Average Student)

39. Arcs are used to visually represent _________ between two or more relationships in an ERD.

a. Samenessb. Differenciesc. Exclusivity d. An Arc is what Noah sailed on with all the animals.

40. No parts of a UID are mandatory. True or False? a. Trueb. False

41. A relationship can be both Recursive and Hierarchal at the same time. True or False? a. Trueb. False

42. If Audit trail attributes are added to an entity they must be in the entities they are auditing. True or False?

a. True b. False

43. Database Design projects must use Consultants or they will fail. True or False? a. Trueb. False

44. Your apperance at a presentation is important. You need to look smart and presentable. True or False?

a. True b. False

45. If a system includes the concept of time, and it stores Start Dates, then End Dates becomes Mandatory. For each Start Date attribute you create, you MUST create an End Date attribute and it must be mandatory. True or False?

a. Trueb. False

46. There is only one way to model time in a Data Model. True or False? a. Trueb. False


48. Which of the following would be a logical constraint when modeling time for a City entity?

a. People are born in the city and people die in the city.b. Cites may change their name and/or which country they are placed in, if the borders of

a country change. c. If you are doing a system for any French City, you would need security clearanced. You need a constant record of cities because they are still cities, even if leadership

changes over time, e.g. they get a new Mayor


a. Trueb. False

50. Why would you want to model a time component when designing a system that lets people buy shares via the Internet? (Choose Two)

a. This would only be required in the US to allow the New York Stock Exchange to be notified of this information.

b. To allow the sales people to determine when the shared were bought and therefore at what price.

c. You would not want to model this, it is not important.d. The price of shares fluctuates and for determining price, you need to know the time of

purchase

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