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DatabaseFinal Exam Practice Questions and Answers | 100% Pass

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DatabaseFinal Exam Practice Questions and Answers | 100% Pass One-to-One relationships are transformed into Check Constraints in the tables created at either end of that relationship. True or False? - Answer-False The Oracle Database can implement a many-to-many relationship. You simply create ...

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DatabaseFinal Exam Practice Questions
and Answers | 100% Pass

One-to-One relationships are transformed into Check Constraints in the tables created at either end of

that relationship. True or False? - Answer✔✔-False


The Oracle Database can implement a many-to-many relationship. You simply create two foreign keys

between the two tables. True or False? - Answer✔✔-False


When translating an arc relationship to a physical design, you must turn the arc relationships into foreign

keys. Assuming you are implementing an Exclusive Design, you must also create two Unique Key

Constraints to ensure the Arc is implemented correctly. True or False? - Answer✔✔-False


The transformation from an ER diagram to a physical design involves changing terminology. Secondary

Unique Identifiers become:




A. Columns




B. Tables




C. Unique Constraints




Page 1/64

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D. Primary Key Constraints - Answer✔✔-Unique Constraints


In a physical data model, an attribute becomes a _____________.


A. Table




B. Foreign Key




C. Constraint




D. Column - Answer✔✔-Column


In an Oracle database, why would 1_TABLE not work as a table name?




A. The database does not understand all capital letters.




B. There is no problem here. You can create a table called 1_TABLE.




C. Object names must not start with a number. They must begin with a letter.




Page 2/64

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D. TABLE is a reserved word. - Answer✔✔-Object names must not start with a number. They must begin

with a letter.


The explanation below is a column integrity constraint. True or False? A column must contain only values

consistent with the defined data format of the column. - Answer✔✔-True


Foreign keys must be null. True or False? - Answer✔✔-False


A table must have a primary key. True or False? - Answer✔✔-False


The explanation below is a User Defined integrity rule and must, therefore, be manually coded; the

Database cannot enforce this rule automatically. True or False? A primary key must be unique, and no

part of the primary key can be null. - Answer✔✔-False


The text below is an example of what constraint type? If the number of BOOKS lent to a BORROWER in

the LIBRARY exceeds 5, then we must send him a letter requesting the return of the BOOKS; this will

require extra programming to enforce.




A. Entity integrity




B. User-defined integrity




C. Column integrity




Page 3/64

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D. Referential integrity - Answer✔✔-User-defined integrity


System Documentation is developed right at the end once the system has gone live and users have been

using it for a little while. You are more likely to get it correct that way. True or False? - Answer✔✔-False


In the Analysis phase, the tables are created and populated with test data. True or False? - Answer✔✔-

False


Once you have created a table, it is not possible to alter the definition of it. If you need to add a new

column you must delete the table definition and create a new, correct table. True or False? - Answer✔✔-

False


The f_customers table contains the following data:




ID NAME ADDRESS CITY STATE ZIP


1 Cole Bee 123 Main Street Orlando FL 32838


2 Zoe Twee 1009 Oliver Avenue Boston MA 02116


3 Sandra Lee 22 Main Street Tampa FL 32444




If you run the following statement: DELETE FROM F_CUSTOMERS WHERE ID <= 2;




How many rows will be left in the table?




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