Data Management Foundations Pre Test 2

53. A table can be deleted from the database by using the ____ command. a. DROP b. DELETE c. MODIFY d. ERASE

A

54. UPDATE tablename ***** [WHERE conditionlist]; What command replaces the ***** in the above statement? a. SET columnname = expression b. columnname = expression c. expression = columnname d. LET columnname = expression

A

56. During which step in the extract, transform, load (ETL) process are raw data sets aggregated? a. Transformation b. Extraction c. Loading d. Denormalization

A

9. Database models were developed to ____. a. model real-world events or conditions b. deposit data within a single file c. keep data within multiple data repositories d. allow DBMSs to maintain loose control over the database activities

A

15. A table is perceived as a ____. a. flat structure b. two-dimensional structure c. linked structure d. graph

B

28. A relationship is an association between ____. a. objects b. entities c. databases d. fields

B

29. A ____ key is a key that consists of more than one attribute. a. primary b. foreign c. composite d. domain

C

45. Which command would you use when making corrections to the PRODUCT table? a. CHANGE PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2'; b. ROLLBACK PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2'; c. EDIT PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2'; d. UPDATE PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2';

D

C

What is the E-R Diagram about an online pet food vendor showing? a. An Invoice Line can include many Items b. An item can only be included in one Invoice Line c. One Invoice Line must include a minimum of one and a maximum of one Item. d. The relationship between Item and Invoice Line is many-to-many.

C

What is the correct way to read the modality on the right side of the association? a. A maximum of one activity b. A maximum of zero activities c. A minimum of zero activities d. A maximum of many activities

D

What is the modality of Volunteer? a. Two or more b. Two c. Dependent on registration date d. At least one

A

What is the modality of appointment? a) At least one b) Dependent on the quantity c) Two d) Two or more

D

58. A database includes the table shown above in the exhibit. Each teacher is associated with exactly one campus. The address in the table is the address for the campus where the teacher teaches. What change would you need to make to normalize the database to the third normal form (3NF)? a) Combine the FirstName and LastName columns into a single column. b) Combine the Campus, Address, City, State, Country, and PostalCode columns into a single column. c) Create a separate table for campus address information. Use the Campus as the primary key. Add a TeacherID column to the table and relate it to the Teacher ID column in the Teachers table. d) Create a separate table for campus address information. Use Campus as the primary key for the table. Create a foreign key in the Teachers table that relates teacher to the campus.

12. What type of relationship is expressed with the phrase "A Painter paints one or more Paintings"? a. 1:M b. 1:1 c. M:1 d. M:N

A

13. The entity integrity rule requires that ____. a. all primary key entries are unique b. a part of the key may be null c. foreign key values do not reference primary key values d. duplicate object values are allowed

A

21. Which of the following statements concerning the primary key is true? a. All primary key entries are unique. b. The primary key may be null. c. The primary key is not required for all tables. d. The primary key data do not have to be unique.

A

23. When designing a new database, it is a good idea to ____ a. minimize data redundancy b. include redundant fields c. include a common field in all tables d. use composite keys

A

24. An attribute (or combination of attributes) that uniquely identifies each entity in a table is called a ____. a. superkey b. candidate key c. primary key d. secondary key

A

31. If an entity can exist apart from one or more related entities, it is said to be ____-independent. a. existence b. relationship c. business d. weak

A

33. The set of possible values for an attribute is a ____. a. domain b. range c. set d. key

A

35. A table that has all key attributes defined, has no repeating groups, and all its attributes are dependent on the primary key, is said to be in ____. a. 1NF b. 2NF c. 3NF d. 4NF

A

40. Given the table EMP_PROJ (PROJ_NUM, EMP_NUM, PROJ_NAME, EMP_NAME, JOB_CLASS, CHG_HOURS, HOURS), which of the following is a partial dependency? a. PROJ_NUM --> PROJ_NAME b. JOB_CLASS --> CHG_HOUR c. PROJ_NUM, EMP_NUM --> HOURS d. PROJ_NUM, EMP_NUM --> CHG_HOURS

A

42. The SQL command that lets you insert data into a table, one row at a time, is ____. a. INSERT b. SELECT c. COMMIT d. UPDATE

A

46. Which command would be used to delete the table row where the P_Code = '2238/QPD'? a. DELETE FROM PRODUCT WHERE P_CODE = '2238/QPD'; b. REMOVE FROM PRODUCT WHERE P_CODE = '2238/QPD'; c. ERASE FROM PRODUCT WHERE P_CODE = '2238/QPD'; d. ROLLBACK FROM PRODUCT WHERE P_CODE = '2238/QPD';

A

49. Which query will list all the rows in which the inventory stock dates occur on or after January 20, 2006? a. SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= '01/20/2006' b. SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= #01/20/2004# c. SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= '20-JAN-2004' d. SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= {01-20-2004}

A

19. A table can be logically connected to another table by defining a ____. a. hyperlink b. common attribute c. primary key d. logic key

B

27. A derived attribute ____. a. must be stored physically within the database b. need not be physically stored within the database c. has many values d. must be based on the value of three or more attributes

B

3. Which item is unstructured data? a. A record representing one student b. A video c. A table that holds student data d. A relational database that hold course registration data.

B

30. A ____ attribute is one that cannot be subdivided. a. composite b. atomic c. single-valued d. multivalued

B

39. Dependencies based on only a part of a composite primary key are called ____ dependencies. a. primary b. partial c. incomplete d. composite

B

4. Data is/are: a. information b. raw facts c. processed information d. a DBMS

B

44. To list all the contents of the PRODUCT table, you would use ____. a. LIST * FROM PRODUCT; b. SELECT * FROM PRODUCT; c. DISPLAY * FROM PRODUCT; d. SELECT ALL FROM PRODUCT;

B

48. Which query will output the table contents when the value of V_CODE is less than or equal to 21344? a. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <> 21344; b. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <=21344; c. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE => 21344; d. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344;

B

51. What is the command to join the P_DESCRIPT and P_PRICE fields from the PRODUCT table and the V_NAME, V_AREACODE, V_PHONE, and V_CONTACT fields from the VENDOR table where the value of V_CODE match? a. SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <> VENDOR.V_CODE; b. SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE = VENDOR.V_CODE; c. SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <= VENDOR.V_CODE; d. SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE => VENDOR.V_CODE;

B

57. Which is an important issue associated with the loading component of extract, transform, load (ETL)? a. Mapping keys from one system to another b. Monitor refreshing volume and frequency c. Determining the content of the data d. Denormalizing and renormalizing data

B

59. Which statement will remove all rows from the Materials table that have a Status value of 'Obsolete' but do not have a value for the VendorID column? a) DELETE Materials WHERE Status = 'Obsolete' OR VendorID IS NULL a) DELETE FROM Materials WHERE Status = 'Obsolete' AND VendorID IS NULL b) DELETE MaterialID, Description, Status, VendorID FROM Materials WHERE Status = 'Obsolete' AND VendorID IS NULL c) DELETE FROM Materials WHERE Status = 'Obsolete' WHERE VendorID IS NULL

B

8. A pet owner can have many pets; a specific pet is linked to one pet owner. Which kind of binary relationship is described in this example? a. One-to-one b. One-to-many c. Many-to-many d. Associative

B

1. A record consists of a ____. a. character b. collection of related records c. set of one or more fields d. group of files

C

14. What does the 'refer' in referential integrity mean a. The relationships between entities and attributes, also called referrals b. Reference points that databases place in each record during backups c. A foreign key in a table must refer to a valid primary key in another table. d. you delete a row in one table whose primary key does not have a matching foreign key value in another table

C

16. Another word for the term "relation" is ____. a. datafile b. data index c. table d. data query

C

17. DISTINT filters the results to remove duplicates. ORDER BY ____. a. does the same thing. b. alters the order of the rows in a table. c. modifies the presentation by changing the order of the result set. d. removes duplicates in the table.

C

2. A DBMS performs several important functions that guarantee the integrity and consistency of the data in the database. Which of the following is NOT one of those functions? a. Data integrity management b. Data storage management c. Data reports d. Security management

C

20. A relational operator that allows for the combination of information from two or more tables is known as the ____ operator. a. SELECT b. PROJECT c. JOIN d. DIFFERENCE

C

22. We can describe a link by observing that ____. a. a primary key of one table appears again as a primary key in a related table b. a foreign key of one table appears again as a foreign key in a related table c. a primary key of one table appears again as a foreign key in a related table d. a foreign key of one table appears again as a primary key in a related table

C

32. A ____ relationship exists when three entities are associated. a. unary b. binary c. ternary d. weak

C

34. Which attribute(s) make up the primary key in the table definition: CLASS (CRS_CODE, CLASS_SECTION, CLASS_TIME, CLASS_ROOM, PROF_NUM) a. CRS_CODE b. CLASS_SECTION c. CRS_CODE and CLASS_SECTION d. There is no primary key

C

36. A table that is in 2NF and contains no transitive dependencies is said to be in ____. a. 1NF b. 2NF c. 3NF d. 4NF

C

41. A relation is not in 1NF if: a. it has multiple candidate keys b. all of the key attributes are defined c. there are repeating groups in the table d. all attributes are dependent on the primary key

C

47. Which command is used to select partial table contents? a. SELECT <column(s)> FROM <Table name> WHERE <Item>; b. LIST <column(s)> FROM <Table name> WHERE <Conditions>; c. SELECT <column(s)> FROM <Table name> WHERE <Conditions>; d. LIST<column(s)> FROM <Table name> WHERE <Item>;

C

52. SQL allows the use of special operators in conjunction with the WHERE clause. A special operator used to check for similar character strings is ____. a. BETWEEN b. IS NULL c. LIKE d. IN

C

55. A ____ join returns rows with matching values and includes all rows from both tables (T1 and T2) with unmatched values. a. natural b. cross c. full outer d. left outer

C

62. Which of the following is structured data? a) Images b) Email Attachments c) Records in a database d) Audio/Video

C

18. A primary key ____. a. is a minimal superkey b. is always the first field in each table c. must be numeric d. must be unique

D

25. A foreign key must ____. a. be numeric b. be unique c. be defined in all tables within the database d. match the value of a primary key in a related table

D

26. The ERD is used to graphically represent the ____ database model. a. condensed b. physical c. logical d. conceptual

D

37. Data redundancy produces ____. a. slower lookups b. robust design c. efficient storage use d. data integrity problems

D

38. Normalization works through a series of normal ____. a. schemas b. entities c. databases d. forms

D

43. The SQL command that enables you to make changes in the data is ____. a. INSERT b. SELECT c. COMMIT d. UPDATE

D

50. What is the SQL syntax requirement to list the table contents for either V_CODE = 21344 or V_CODE = 24288? a. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE <= 24288 b. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE => 24288 c. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE > 24288 d. SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE = 24288

D

C

The TestScores table is shown in the exhibit and has these characteristics: Each student has a unique StudentID that references the Students table. Each instructor has a unique InstructorID that references the Instructors table Each student may take multiple tests on the same date. Each student may take tests on multiple dates. What column or columns should you use for the primary key? a) StudentID, Date b) StudentID, Test, Date, InstructorID c) StudentID, Test, and Date d) Test

A

What form is this table in? a) Unnormalized b) First normal form c) Second normal form d) Third normal form

C

What form is this table in? a) Unnormalized b) First normal form c) Second normal form d) Third normal form

A

Which classification is correct for the box marked "Registration" in the given E-R Diagram? a. Intersection data b. Modality data c. Cardinality data d. Student data

A

Which kind of relationship does the diagram below depict? a) Unary one-to-many b) Binary many-to-many c) Unary many-to-many d) Binary one-to-many

C

Which kind of relationship does the diagram below depict? a) Unary one-to-many b) Binary many-to-many c) Unary one-to-one d) Binary one-to-many

B

Which type of relationship exists between Student and Course a. One-to-many binary b. Many-to-many binary c. One-to-many unary d. Many-to-many unary

D

You are creating a relational database to store information about instructors and the courses that each instructor teaches. Each course is taught by a single instructor. You have created an Instructor table and a Course table as shown above. You need to create a relationship between the Instructor table and the Course table. You need to keep duplicate data to a minimum. What should you do? a) Create a new column in the Instructor table. b) Create new columns in the Instructors table for each course taught. c) Create a new table that includes two columns. d) Create a new column in the Course table