Section 11.2 Oracle Quiz

Section 11.2

1. In a physical data model, an entity becomes a/an _____________.

• Table (*)
• Constraint
• Column
• Attribute

2. In a physical data model, a relationship is represented as a:

• Primary Key
• Unique Identifier
• Column
• Foreign Key (*)

3. Attributes become columns in a database table. True or False?

• True (*)
• False

4. Why would this table name NOT work in an Oracle database?
2007_EMPLOYEES

• Numbers cannot be incorporated into table names
• Table names must start with an alphabetic character (*)
• Underscores "_" are not allowed in table names
• None of the above

5. In an Oracle database, why would the following table name not be allowed 'EMPLOYEE JOBS'?

• The database does not understand all capital letters
• JOBS is a reserved word
• EMPLOYEE is a reserved word
• You cannot have spaces between words in a table name (*)

6. The transformation from an ER diagram to a physical design involves changing terminology. Entities in the ER diagram become __________ , and attributes become ____________.

• Foreign Keys, Columns
• Tables, Foreign Keys
• Columns, Tables
• Tables, Columns (*)

7. The transformation from an ER diagram to a physical design involves changing terminology. Relationships in the ER diagram become __________ , and primary unique identifiers become ____________.

• Foreign keys, Optional business rules
• Foreign keys, Primary keys (*)
• Primary keys, Foreign keys
• Foreign keys, Mandatory business rules

Section 11.1 Oracle Quiz

Section 1
(Answer all questions in this section)

1. Identify all of the correct statements that complete this sentence: A primary key is: (Choose Three) (Choose all correct answers)

• A single column that uniquely identifies each row in a table (*)
• A set of columns that uniquely identifies each row in a table (*)
• A set of columns and keys in a single table that uniquely identifies each row in a single table (*)
• Only one column that cannot be null

2. A table does not have to have a primary key. True or False?

• True (*)
• False

3. One or more columns in a primary key can be null. True or False? 

• True
• False (*)

4. A foreign key always refers to a primary key in the same table. True or False?

• True
• False (*)

5. Foreign keys cannot be null when

• It is part of a primary key (*)
• It refers to another table
• It contains three or more columns

6. Column integrity refers to

• Columns always having values
• Columns always containing positive numbers
• Columns always containing values consistent with the defined data format (*)
• Columns always containing text data less than 255 characters

7. The explanation below is an example of which constraint type?
A primary key must be unique, and no part of the primary key can be null.

• Entity integrity (*)
• Referential integrity
• Column integrity
• User-defined integrity

8. The explanation below is an example of which constraint type?
A column must contain only values consistent with the defined data format of the column

• Entity integrity
• Referential integrity
• Column integrity (*)
• User-defined integrity

9. The explanation below is an example of which constraint type?
The value in the dept_no column of the EMPLOYEES table must match a value in the dept_no column in the DEPARTMENTS table.

• Entity integrity
• Referential integrity (*)
• Column integrity
• User-defined integrity

10. The explanation below is an example of which constraint type?
If the value in the balance column of the ACCOUNTS table is below 100, we must send a letter to the account owner which will require extra programming to enforce.

• Entity integrity
• Referential integrity
• Column integrity
• User-defined integrity (*)

Section 10 Oracle Quiz

Test: Quiz: Modeling Change: Time
1. How do you know when to use the different types of time in your design?

• The rules are fixed and should be followed
• It depends on the functional needs of the system (*)
• You would first determine the existence of the concept of time and map it against the Greenwich Mean Time
• Always model time, you can take it out later if it is not needed

2. Modeling historical data produces efficient ways for a business to operate such as:

• Modeling historical data does not help a business.
• Providing valuable information via reports to management . (*)
• Keeping track of holiday dates.
• Employees can work in two time zones.

3. When you add the concept of time to your data model, you are:

• Simplifying your model.
• Adding complexity to your model. (*)
• Just changing the model, but this does not change the complexity of it.
• None of the above.

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

• People have births and deaths in their countries that must be tracked by the system.
• If you are doing a system for France or Germany, you would need security clearance.
• Countries may need an end date in your system, because they can change fundamentally over time, e.g. Yugoslavia. (*)
• You need a constant record of countries, because they are still countries, even if leadership changes over time, e.g. France, USA and most other countries.

5. If you are tracking employment dates for an employee, do you need to have an “End Date” attribute?

• Yes, because you always need an end date when you have a start date
• No, because an end date is usually redundant
• Yes, if the company wants to track employee information, like multiple start and end dates (*)
• No, not if the company likes the employee

6. What is the benefit to the users of a system that includes “time,” e.g. Start Date and End Date for Employees?

• Increased usability and flexibility of a system; we can the trace e.g. the different managers an employee had over time. (*)
• System becomes 100% unstable; allows users to log on and log off at will.
• Users are able to create complex programs in support of this component.
• Reporting becomes nearly impossible, users enjoy this.

7. It is desirable to have an entity called DAY with a holiday attribute when you want to track special holidays in a payroll system. True or False?

• True (*)
• False

Test: Quiz: Modeling Change: Price

1. You are doing a data model for a computer sales company, where the price goes down on a regular basis. If you want to allow them to modify the price and keep track of the changes, what is the best way to model this?

• A. Create a product entity and a related price entity with start and end dates, and then let the users enter the new price whenever required.
• B. Create a new item and a new price every day.
• C. Use a price entity with a start and end date
• D. Allow them to delete the item and enter a new one.
• E. Both A and C (*)

2. Why would you want to model a time component when designing a system that lets people buy bars of gold?

• The price of gold fluctuates and for determining price, you need to know the time of purchase (*)
• To allow the sales people to determine where the gold is coming from
• You would not want to model this, it is not important
• The Government of your country might want to be notified of this transaction.

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

• End Date must be before the Start Date.
• ASSIGNMENT periods can overlap causing the database to crash.
• An ASSIGNMENT may only refer to a COUNTRY that is valid at the Start Date of the ASSIGNMENT. (*)
• Dates can be valued only with Time.

4. What is the function of logging or journaling in conceptual data models?

• Allows you to track the history of attribute values, relationships and/or entire entities (*)
• Gives a timestamp to all entities
• Represents entities as time in the data model
• Creates a fixed time for all events in a data model

Secion 8 Oracle Quiz

Test: Quiz: What is a Consultant

1. How does the dictionary define “consultant”?

• A person who knows everything
• One responsible for knowing everything
• One who gives expert or professional advice (*)
• None of the Above

2. Only Consultants can develop new data models for a company, they are mandatory, so companies must find them and hire them. True or False?

• True
• False (*)

3. Which of the following skills are required for Consultants. (Choose Two)

• Communication skills (*)
• Excellent drawing skills
• Must be able to speak at least two languages fluently, preferably four or more
• Team-working skills (*)

Test: Quiz: Overcoming the Fear Factor

1. Which of the following is a valid technique for effective public speaking?

• Making eye contact
• Using familiar words when communicating technical information
• Being enthusiastic
• All of the Above (*)

2. Your apperance at a presentation is not important, you should just show up and give the presentation in whatever clothes makes you comfortable. So feel free to wear Jeans and old T-Shirts etc. Being comfortable is more important than anything else. True or False?

• True
• False (*)

3. When you are involved in a group presentation, your group should practice before hand and agree on who presents the various parts. You should all be involved somehow. True or False?

• True (*)
• False

Section 7 Oracle Quiz

Test: Quiz: Arcs

1. This diagram could also be expressed as a supertype/subtype construction. True or False?

• True
• False (*)

2. If the entity CD has the attributes: #number, *title, *producer, *year, o store name, o store address, this entity is in 3rd Normal Form (”no non-UID attribute can be dependent on another non-UID attribute). True or False?

• True
• False (*)

3. Which of the following can be added to a relationship?

• an attribute
• an arc can be assigned (*)
• a composite attribute
• an optional attribute can be created

4. Which of the following would best be represented by an arc?

• STUDENT (senior, junior)
• STUDENT (graduating, non-graduating)
• STUDENT (will-attend-university, will-not-attend-university)
• STUDENT ( University, Trade School) (*)

5. All parts of a UID are mandatory. True or False?

• True (*)
• False

6. Which of the following is the definition for Third Normal Form?

• All attributes are single valued
• An attribute must be dependent upon entity’s entire unique identifier
• No non-UID attribute can be dependent on another non-UID attribute (*)
• All attributes are uniquely doubled and independent

7. To visually represent exclusivity between two or more relationships in an ERD you would most likely use an ________.

• Arc (*)
• UID
• Subtype
• Supertype

8. Secondary UID’s are

• not permitted in data modeling
• mandatory in data modeling
• useful as an alternative means identifying instances of an entity (*)
• always comprised of numbers

Test: Quiz: Hierarchies and Recursive Relationships

1. Which of the following would be a good Unique Identifier for its Entity? (Choose Two)

• Identification Number for Person (*)
• Birthdate for Baby Which Includes Hour, Minute, and Seconds  (*)
• Order date for Order
• Vehicle Type Number for Car

2. A relationship can be both recursive and hierachal at the same time. True or False?

• True
• False (*)

3. A recursive rationship should not be part of a UID. True or False?

• True (*)
• False

4. In this simple diagram, what comprises the unique identifier for the student class entity?

• student id and class id
• student id, class id and course id
• course id
• student id and course id (*)

Test: Quiz: Modeling Historical Data

1. Which of the following scenarios should be modeled so that historical data is kept? (Choose two)

• LIBRARY and BOOK (*)
• STUDENT and AGE
• STUDENT and GRADE (*)
• LIBRARY and NUMBER OF STAFF

2. Modeling historical data can produce a unique identifier that includes a date. True or False?

• True (*)
• False

3. Audit trail attributes cannot be placed in the entities they are auditing, they must be placed in separate, new entities, created just for that purpose. True or False?

• True
• False (*)

4. Historical data should always be kept. True or False?

• True
• False (*)

Section 6 Oracel Quiz

Test: Quiz: Artificial, Composite and Secondary UIDs

1. A unique identifier can only be made up of one attribute. True or False?

• True
• False (*)

2. An entity can only have one UID. True or False?

• True
• False (*)

3. People are not born with “numbers”, but a lot of systems assign student numbers, customer IDs, etc.ﾠA shoe has a color, a size, a style, but may not have a descriptive “number”. So, to be able to uniquely and efficiently identify one instance of the entity SHOE, a/an ______________ UID can be created.

• artificial (*)
• unrealistic
• structured
• identification

4. A UID can be made up from the following: (Choose Two)

• Attributes (*)
• Entities
• Relationships (*)
• Synonyms

Test: Quiz: Normalization and First Normal Form

1. When data is stored in more than one place in a database, the database violates the rules of ___________.

• Normalization (*)
• Replication
• Normalcy
• Decency

2. An entity can have repeated values and still be in 1st Normal Form. True or False?

• True
• False (*)

3. The following entity is on 1st normal form: True or False?

ENTITY: VEHICLE

ATTRIBUTES:
REGISTRATION
MAKE
MODEL
COLOR
DRIVER
PASSENGER 1
PASSENGER 2
PASSENGER 3

• True
• False (*)

4. When all attributes are single-valued, the database model is said to conform to:

• 1st Normal Form (*)
• 2nd Normal Form
• 3rd Normal Form
• 4th Normal Form

Test: Quiz: Second Normal Form
1. What is the rule of Second Normal Form?

• All non-UID attributes must be dependent upon the entire UID (*)
• Some non-UID attributes can be dependent on the entire UID
• No non-UID attributes can be dependent on any part of the UID
• None of the Above

2. Examine the following entity and decide which attribute breaks the 2nd Normal Form rule:

ENTITY: CLASS

ATTRIBUTES:
&nbspCLASS ID
&nbspDURATION
&nbspSUBJECT
&nbspTEACHER NAME AND ADDRESS

• CLASS ID
• DURATION
• SUBJECT
• TEACHER NAME AND ADDRESS (*)

3. All instances of the subtypes must be an instance of the supertype.

• True (*)
• False

4. Not all instances of the supertype are instances of one of the subtypes.

• True
• False (*)

5. A supertype should have at least two subtypes.

• True (*)
• False

6. An entity can be on 2nd Normal Form even if it has repeated values. True or False?

• True
• False (*)

Test: Quiz: Third Normal Form

1. Examine the following Entity and decide which sets of attributes breaks the 3rd Normal Form rule: (Choose Two)

ENTITY: TRAIN (SYNONYM: ROLLING STOCK)

ATTRIBUTES:
TRAIN ID
MAKE
MODEL
DRIVER NAME
DEPARTURE STATION
NUMBER OF CARRIAGES
NUMBER OF SEATS
DATE OF MANUFACTURE

• TRAIN ID, MAKE
• DEPARTURE STATION, DRIVER NAME (*)
• NUMBER OF CARRIAGES, NUMBER OF SEATS
• MODEL, DATE OF MANUFACTURE

2. As a database designer it is your job to store data in only one place and the best place. True or False?

• True (*)
• False

3. No databases in the world is ever truly on 3rd Normal Form. Everyone always stops after 2nd Normal Form. True or False?

• True
• False (*)

Section 5 Oracle Quiz

Test: Quiz: Relationship Transferability

1. Non-transferable relationships can only be mandatory, not optional. True or False?

• True (*)
• False

2. A non-transferable relationship is represented by which of the following symbols? M

• Heart
• Diamond (*)
• Circle
• Triangle

3. If a relationship can be moved between instances of the entities it connects, it is said to be:

• Implicit
• Transferrable (*)
• Committed
• Recursive

Test: Quiz: Relationship Types

1. What uncommon relationship is described by the statements: “Each LINE must consist of many POINTS and each POINT must be a part of many LINES”

• One to Many Optional
• One to Many Mandatory
• Many to Many Optional
• Many to Many Mandatory (*)

2. Many to many relationships between entities usually hide what?

• Another relationship
• Another entity (*)
• More attributes
• Uniqueness

3. When resolving an M:M relationship, the new relationships will always be __________ on the many side.

• optional
• recursive
• mandatory (*)
• redundant

4. Which of the following are relationship types? (Choose Two)

• One to Some
• Many to Many (*)
• One to Many (*)
• One to Another

5. If the same relationship is represented twice in an Entity Relationship Model, it is said to be:

• Replicated
• Removable
• Redundant (*)
• Resourceful

6. Which of the following pairs of entities is most likely to be modeled as a M:M relationship? (Choose Two)

• STUDENT and CLASS (*)
• TREE and SEEDLING
• PHONE NUMBER and SIM CARD
• CAR and DRIVER (*)

7. When are relationships unnecessary?

• When you can derive the relationship from other relationships in the model (*)
• When they have the same visual structure but different meaning
• When the information does not relate to the model
• When the relationships connect 2 entities and they each have distinct meanings

Test: Quiz: Resolving Many to Many Relationships

1. Many-to-Many relationships are perfectly acceptable in a finished ERD. There is no need to do any more work on them. True or False?

• True
• False (*)

2. When you resolve a M-M by creating an intersection entity, this new entity will always inherit:

• The attributes of both related entities.
• A relationship to each entity from the original M-M. (*)
• The UID’s from the entities in the original M-M.
• Nothing is inherited from the original entities and relationship.

3. If an intersection entity is formed that contains no attributes of its own, its uniqueness may be modeled by

• Creating new attributes.
• Barring the relationships to the original entities. (*)
• Placing the UID attributes from the original entities into the intersection entity.
• None of the above.

Section 4 Oracle Quiz

Test: Quiz: Supertypes and Subtypes

1. A supertype should have at least two subtypes. True or False?

• True (*)
• False

2. Which of the following is a TRUE statement about the diagram below?

• Every Z is either an A or a B
• Every B is a Z
• Every A is a Z
• Every A is a B (*)

3. All instances of the subtypes must be an instance of the supertype. True or False?

• True (*)
• False

4. A subtype can have a relationship not shared by the supertype. True or False?

• True (*)
• False

5. Which of the following are valid formats for an attribute?

• Character string (*)
• Decimal
• Number (*)
• HEX

6. All instances of the supertype are also instances of one of the subtypes. True or False?

• True (*)
• False

7. The “Other” subtype is best used:

• For instances that belong to the supertype and at least one other subtype.
• For a subtype that does not have any of the same attributes as the supertype to which it belongs.
• As an extra subtype to ensure that all instances of subtypes are mutually exclusive and complete. By having an “Other” subtype, all instances of the Supertype will be of one subtype type. (*)
• You should never have a subtype called Other.

8. Which of the following is the best scenario for using supertype/subtype entities:

• A pet store that sells small animals, because they each need different size cages and food.
• An ice cream store that sells ice cream in sugar cones and regular cones.
• A grocery store that gives customers a choice of plastic or paper bags.
• A vehicle dealership that sells cars, trucks and boats on trailers. (*)

9. When creating entities it is important to remember all of the following:

• Create a formal description. (*)
• Include attributes. (*)
• Do not use synonyms.
• Do use reserved words.

10. Which of the following is true about supertypes and subtypes?

• Instances that belong to two subtypes of the same supertype may be modeled as a one-to-one relationship between the two subtypes
• Subtypes inherit the relationships and attributes of the supertype (*)
• Subtypes may have no more than 2 levels of nesting
• Supertype and subtype entities must be mutually exclusive

Test: Quiz: Documenting Business Rules

1. How would you model a business rule that states that on a studentﾒs birthday, they do not have to attend their classes?

• Use a supertype
• Use a subtype
• Make the attribute Birthdate mandatory
• You cannot model this. You need to document it (*)

2. Why is it important to identify and document business rules?

• It allows you to create your data model, then check for accuracy. (*)
• It allows you to improve the client’s business.
• It ensures that the data model will automate all manual processes.
• None of the above

3. How should you handle constraints that cannot be modeled on an ER diagram?

• Always let the network architect handle them
• List them on a separate document to be handled programmatically (*)
• Explain them to the users so they can enforce them
• All constraints must be modeled and shown on the ER diagram

4. Which of the following is an example of a structural business rule?

• All employees must belong to at least one department. (*)
• Buildings to be purchased by the business must be current with earthquake building code.
• All overdue payments will have an added 10 % late fee.
• All products will have a selling price no less than 30 % greater than wholesale.

5. A business rule such as “All accounts must be paid in full within 10 days of billing” is best enforced by:

• Making the payment attribute mandatory.
• Making the relationship between CUSTOMER and PAYMENT fully mandatory and 1:1 on both sides.
• Creating a message to be printed on every bill that reminds the customer to pay within ten days.
• Hiring a programmer to create additional programming code to identify and report accounts past due. (*)

6. Business rules are important to data modelers because:

• A. They capture all of the needs, processes and required functionality of the business. (*)
• B. They are easily implemented in the ERD diagram.
• C. The data modeler must focus on structural rules, because they are easily represented diagrammatically and eliminate other rules that involve extra procedures or programming.
• D. Both A and C are true.

7. Only managers can approve travel requests is an example of which of the following?

• A structural business rule.
• A mandatory business rule.
• A procedural business rule. (*)
• An optional business rule.

Section 3 Oracle Quiz

Test: Quiz: Identifying Relationships

1. What are the three properties that every relationship should have?

• Transferability, degree, name
• Name, optionality, degree (*)
• A UID bar, a diamond, an arc
• Name, optionality, arcs

2. Relationships can be either mandatory or optional. True or False?

• True (*)
• False

3. In a business that sells computers, choose the best relationship name from CUSTOMER to ITEM (computer, in this case).

• Each CUSTOMER must be the buyer of one or more ITEMS. (*)
• Each CUSTOMER must be the seller of one or more ITEMS.
• Each CUSTOMER may be the maker of one or more ITEMS.
• Each CUSTOMER may be the producer of one or more ITEMS.

4. Relationships always exist between

• 3 or more entities
• 2 entities (or one entity twice)  (*)
• 2 attributes
• 3 or more attributes

Test: Quiz: ER Diagramming

1. Attributes are written inside the entity to which they belong. True or False?

• True (*)
• False

2. Entity boxes are drawn as

• Soft Boxes (*)
• Hard Boxes
• Bold Circles
• Normal Circles

3. Entity names are always plural. True or False?

• True
• False (*)

4. Which symbol is used to indicate that a particular attribute is optional?

• *
• o  (*)
• #
• &

5. On an ER diagram which symbol identifies an attribute as part of a unique identifier.

• #  (*)
• *
• o
• x

6. Consider the recommended drawing conventions for ERD’s. Indicate which of the following accurately describes diagramming conventions for entities and attributes:

• The * means that an attribute is optional and entity names should be plural verbs
• The ‘o’ means that the attribute is optional and entity names should be plural verbs
• The * means that an attribute is mandatory or required and the entity name should be singular  (*)
• The ‘o’ means that the attribute is mandatory or required and the entity name should be a singular noun

Test: Quiz: Speaking ERDish and Drawing Relationships

1. Two entities can have one or more relationships between them. True or False?

• True (*)
• False

2. After looking at the diagram, choose the sentence below that could be “read” from the existing relationship (even though you’re missing relationship labels!)

• Each Student must have one or more Activities.
• Each Activity may be performed by one or more Students.
• Each Student may participate in one or more Activities. (*)
• Each Activity must belong to one and only one Student.

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

• True
• False (*)

Test: Quiz: Matrix Diagrams

1. A Matrix Diagram will help you with all of the following except:

• Defining Relationships Between Entities
• Identifying Entities
• Defining Instances of Entities (*)
• Naming Relationships

2. Matrix Diagrams helps verify you have identified all possible relationships between your existing entities. True or False?

• True (*)
• False

3. Creating a Matrix Diagram is mandatory when doing Data Modeling. True or False?

• True
• False (*)

Section 2 Oracle Quiz

Test: Quiz: Conceptual and Physical Models
1. Examples of software are:

• Data entry webpages, Spreadsheets, Google and Yahoo search Engines, SQL Developer, Oracle Application Express (*)
• Microsoft Word, Microsoft Powerpoint, Microsoft Excel, Mouse pad
• Mouse, Cables, Microsoft Word, Microsoft Powerpoint
• Monitor, Microsoft Word, Microsoft PowerPoint, SQL Developer

2. Examples of hardware are:

• Data entry web pages, Mouse, Hard disk
• Mouse, Hard disk, Monitor (*)
• Monitor, Mouse, Printer, Printed Reports
• Monitor, Mouse, Mouse pad, Cables and Wires, Hard disk

3. Which of the following are reasons we create conceptual models?

• It facilitates discussion. A picture is worth a thousand words.
• It forms important ideal system documentation.
• It takes into account government regulations and laws
• It forms a sound basis for physical database design
• All of the above. (*)

Test: Quiz: Entities, Instances, Attributes and Identifiers

1. Which of the following statements about attributes are true?

• They describe, qualify, quantify, classify, or specify an entity. (*)
• They are often adjectives.
• They have a data type such as a number or character string. (*)
• They must be single valued unless they belong to more than one entity.

2. All of the following would be instances of the entity PERSON except which?

• David Jones
• Male (*)
• Angelina Rosalie
• Grace Abinajam

3. Some of the following could be attributes of an ENTITY called PERSON. Select the incorrect attributes for PERSON.

• Age
• Freddy Wilson (*)
• Name
• Priya Hansenna (*)

4. Entities are usually verbs. True or False?

• True
• False (*)

5. A/an _________ is a piece of information that in some way describes an entity. It is a property of the entity and it quantifies, qualifies, classifies or specifies the entity.

• ERD
• Process
• Table
• Attribute (*)

6. Unique Identifiers…

• distinguish one entity from another
• distinguish one instance of an entity from all other instances of that entity (*)
• distinguish all entities in a database
• distinguishes nothing

7. An entity may have which of the following?

• experiences
• instances (*)
• tables
• none of the above

8. What is the purpose of a Unique Identifier?

• To uniquely determine a table and columns within that table.
• To identify a specific row within a table, using one or more columns and/or foreign keys.
• Create an entity that is unlike any other entity aside from itself.
• To identify one unique instance of an entity, by using one or more attributes and/or relationships. (*)

9. In a physical data model, an attribute is represented as a/an

• Column (*)
• Row
• Instance
• Foreign Key

10. The word “Volatile” means…

• Changing constantly; unstable (*)
• Static; unlikely to change
• Large quantity
• Limited quantity

11. Which of the following entities most likely contains invalid attributes?

• Entity: Home. Attributes: Number of Bedrooms, Owner, Address, Date Built
• Entity: Pet. Attributes: Name, Birthdate, Owner
• Entity: Car. Attributes: Owner Occupation, Owner Salary, Speed (*)
• Entity: Mother. Attributes: Name, Birthdate, Occupation, Salary

12. In the following statements, find two examples of ENTITY: Instance.

• DAIRY PRODUCT: cow (*)
• VEGETABLE: grows
• BOOK: Biography of Mahatma Gandhi (*)
• BODY PART: Marilyn Manson

Test: Quiz: Entity Relationship Modeling and ERDs

1. The purpose of an ERD is to document the proposed system and facilitate discussion and understanding of the requirements captured by the developer. True or False?

• True (*)
• False

2. A well structured ERD will show only some parts of the finished data model. You should never try to model the entire system in one diagram, no matter how small the diagram might be. True or False?

• True
• False (*)

3. Entity Relationship model is independent of the hardware or software used for implementation. True or False?

• True (*)
• False

4. Which of the following statements are true about ERD’s?

• A piece of information can be shown multiple times on an ERD.
• A piece of information should only be found one place on an ERD. (*)
• You should not model derivable data. (*)
• All data must be represented on the ERD, including derived summaries and the result of calculations.

Section 1 Oracle Quiz

Test: Quiz: Introduction to The Oracle Academy

1. There is a big increase in demand for Information Technology professionals in today’s market. True or False?

• True (*)
• False

2. Why is it important to identify the business requirements before beginning to program a new system?

• It is not important to have a blueprint for database design and programs. You should just start coding as soon as possible, so you can meet your deadlines.
• It clarifies what a business wants to accomplish, so that you can get your database design and coding started correctly.(*)
• It allows application development to be conducted without having to consider database design.
• It keeps businesses honest.

3. What are the major content areas covered in the Oracle Academy?

• Database programming and Computer repair.
• Database configuration and performance tuning.
• Data Modeling, SQL, and PL/SQL (*)
• Data Modeling, PJava and C+

Test: Quiz: Data vs Information

1. How do you turn “data” into “information”

• By testing it
• By querying it or accessing it (*)
• By storing it on a server
• By storing it in a database

2. Which of the following are examples of data vs. information.

• A. Student age vs. average age of all students in class
• B. Bank deposit amount vs. total account balance
• C. Winning time for a race vs. length of race
• D. Price of computer vs. total sales of all computers for a company
• E. Both A and B (*)

3. Consider an example where an Oracle database works “behind the scenes” for common internet activity. Which of the following best describes a database transaction?

• A person searching an airline website to find all available fares for a flight.(*)
• A business identifies what processes it uses for purchasing inventory.
• A student places a link to their homepage from the school’s website.
• A person looking in the newspaper for good internet sites.

4. What are the results of having all your data in one central location?

• Improved performance (*)
• Easier access to data (*)
• Updates are harder to execute
• Decreased performance

Test: Quiz: History of the Database

1. Oracle was one of the first relational database systems available commercially? True or False?

• True (*)
• False

2. Which of the following is the correct order for the Database Development Process?

• Strategy, Analysis, Design, Build (*)
• Analysis, Strategy, Design, Build
• Build, Strategy, Analysis, Design
• Design, Build, Strategy, Analysis

3. Data Modeling is the last stage in the development of a database. True or False?

• True
• False (*)

Test: Quiz: Major Transformations in Computing

1. Personal computers (PCs) have been in existence since 1950. True or False?

• True
• False (*)

2. Which of the following is NOT a type of database?

• Hierarchical
• Relational
• SQL (*)
• Network

3. Databases function more efficiently as:

• Multiple applications on multiple client-servers
• Integrated software on fast processing servers (*)
• Client-based software on client-servers
• Client-based software on personal computers

4. Users would use which of the following software to access essential business applications?

• GUI Interface (*)
• Internet Browser (*)
• Server
• Operating System (*)

5. In the grid computing model, resources are pooled together for efficiency. True or False?

• True (*)
• False