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QUESTION: 11 Which statement is used to define a named group of related tables, views, domains and other database objects?
A. CREATE
B. CREATE TABLE
C. CREATE DOMAIN
D. CREATE SCHEMA
Answer: D
QUESTION: 12 Which of the following best describes the ON DELETE NO ACTION referential integrity constraint?
A. If a parent key is deleted, any child keys referenced by the parent key are automatically deleted.
B. If a parent key is deleted, no test is made for referential integrity.
C. If any child key references a parent key, the record containing the parent key cannot be deleted.
D. If a parent key is deleted, all child keys are automatically set to a specified value.
Answer: C
QUESTION: 13 Consider the following relational algebraic expression: Which of the following SQL statements is equivalent to this relational algebraic expression?
A. SELECT * FROM Customers, Employees WHERE Sales_Rep_No = Cust_No;
B. SELECT Cust_No, Cust_Name,
Emp_Name, Emp_Loc FROM Customers, Employees WHERE Customers.Sales_Rep_No = Employees.Sales_Rep_No;
C. SELECT Cust_No, Cust_Name, Emp_Name, Emp_Loc FROM Customers, Employees WHERE Employees.Sales_Rep_No =
Customers.Sales_Rep_No;
D. SELECT * FROM
Customers, Employees WHERE Customers.Sales_Rep_No = Employees.Sales_Rep_No;
Answer: B
QUESTION: 14 What is a domain?
A. A normalized set of data applicable to a particular relation
B. A combination of attributes for a relation
C. A definition of permissible values for one or more attributes
D. A set of permissible values for one or more relations
Answer: C
QUESTION: 15 For the Employee relation shown in the exhibit, which set of column value holds the complete tuple for the employee named James Smith?
A. 0002, James, Smith
B. 0002, James, Smith, 10-25-76
C. First_Name, James, Last_Name, Smith
D. Emp_ID, 0002, First_Name, James, Last_Name, Smith
Answer: B
QUESTION: 16
Which pair of relational algebraic operations requires union compatibility?
A. Union and join
B. Selection and projection
C. Intersection and difference
D. Cartesian product and intersection
Answer: C
QUESTION: 17 Consider the following table as well as the Dept1_Parts and Dept2_Parts relations shown in the exhibit: Which of the following relational algebraic expressions would result in the given table?
A. A
B. B
C. C
D. D
Answer: A
QUESTION: 18
What is the most important service provided by a database management system?
A. Provides support for a data manipulation language
B. Allows users to store data in a distributed data repository
C. Provides support for data formatting language commands
D. Translates procedural commands into non-procedural commands
Answer: A
QUESTION: 19 Consider the table for an employee database shown in the exhibit. What is the cardinality of the table?
A. 6
B. 20
C. 4
D. 25
Answer: C
QUESTION: 20
What is a relational database domain?
A. A group of attributes
B. A set of permissible tuple values
C. A collection of related data items
D. A set of permissible attribute values
Answer: D
QUESTION: 21 Consider the table for an employee database shown in the exhibit. What is the degree of the table?
A. 25
B. 5
C. 4
D. 20
Answer: B
QUESTION: 22
What improvement can be made to file-based databases to overcome their limitations?
A. Implement a tabular structure.
B. Gather files in a distributed repository.
C. Use a hierarchical database file system.
D. Tightly couple database structure to database application programs.
Answer: A
QUESTION: 23 NULL) Primary Key Class_Num Consider the Information Engineering diagram shown in the exhibit. Which DBDL definition best describes this diagram?
A. BUILDING(Building_ID, Bldg_Name, Location,
Room_Count) Primary Key Building_ID RESIDENT(R_ID, Room_Num,
Res_Name, Building_ID) Primary Key R_ID
B. BUILDING(Building_ID, Bldg_Name, Location, Room_Count)
Primary Key BUILDING RESIDENT(R_ID, Room_Num,
Res_Name, Building_ID) Primary Key RESIDENT
C. BUILDING(Building_ID, Bldg_Name, Location,
Room_Count) Primary Key BUILDING Foreign
Key BUILDING(Building_ID) references RESIDENT(Building_ID) RESIDENT(R_ID,
Room_Num, Res_Name, Building_ID) Primary Key RESIDENT
D. BUILDING(Building_ID, Bldg_Name, Location, Room_Count)
Primary Key Building_ID RESIDENT(R_ID, Room_Num,
Res_Name, Building_ID) Primary Key R_ID Foreign Key
Building_ID references BUILDING(Building_ID)
Answer: D
QUESTION: 24 Consider the Information Engineering diagram in the exhibit showing the relations BUILDING and RESIDENT. What is the relationship between BUILDING and RESIDENT?
A 1:1
B. 1:N
C. N:1
D. M:N
Answer: B
QUESTION: 25 You enterprise must decide whether to use a database management system. Which of the following lists four advantages of using a DBMS?
A. Management of data redundancy, increased data integrity, increased data dependence, and increased application program flexibility.
B. Consistency of data, adherence to standards, managed concurrency, and increased software complexity.
C. Increased data access, increased data backup and recovery, data sharing, and consistency of data.
D. Increased data secriry, increased data integrity, increased data independence, and decreased data separation.
Answer: C
QUESTION: 26
Which of the following occurs in a relation when records are added or removed?
A. The number of domains changes.
B. The attributes in the domain change.
C. The cardinality of the relation is fixed but the degree varies.
D. The degree of the relation is fixed but the cardinality varies.
Answer: D
QUESTION: 27
Your enterprise is creating a relation (shown in the exhibit) that tracks parts and suppliers.
Which situation would occur if new supplier information were entered in the relation before any
information about specific parts?
A. An update anomaly and an insertion anomaly would occur.
B. An insertion anomaly would occur.
C. A deletion anomaly would occur.
D. A deletion anomaly and an update anomaly would occur.
Answer: B
QUESTION: 28 The creation of intermediate entities occurs during the logical database design phase for an enterprise. It is used to resolve which types of relationships?
A. One-to-many and recursive
B. Complex, recursive, and many-to-many
C. Redundant, recursive, and one-to-many
D. One-to-many and one-to-one
Answer: B
QUESTION: 29 Your enterprise is developing a database system that will contain highly sensitive data. Security of the data will take priority over database processing speed. Which database protection technique should be employed?
A. Backups
B. User views
C. Encryption
D. Integrity controls
Answer: C
QUESTION: 30 The exhibit shows a table called Housing Relation that relates a unique student identification number with a dormitory building and a room fee for that building. Each building charges only one fee and a student can live in only one building. The key for the Housing Relation is Student_ID. This table is in which normal form?
A. 1NF
B. 1NF and 2NF
C. 1NF, 2NF and 3NF
D. 1NF, 2NF, 3NF and BCNF
Answer: B
QUESTION: 31 The exhibit shows a relation for a company projects. Which candidate key(s) would best serve as the primary key for this relation?
A. S_Date and E_Date
B. ProjJD
C. ltem_Num and E_Date
D. Proj_ID and Item_Num
Answer: D
QUESTION: 32
Which of the following best describes a composite key?
A. A composite key is a primary key that consists of the first two attributes of a relation.
B. A composite key is a primary or foreign key defined by its parent keys.
C. A composite key is a foreign key that consists of the same attributes as the primary key from a related table.
D. A composite key is a primary or foreign key that consists of two or more attributes of a relation.
Answer: D
QUESTION: 33 Consider the following database information: domain s_id: integer domain grd: fixed length character string length 1 STUDENT_GRADE( Student_Number: s_id NOT NULL Grade: grd )
Primary Key Student_Number During which phase of the database design process would this
information be developed?
A. Logical
B. Physical
C. Conceptual
D. Implementation
Answer: A
QUESTION: 34 Consider the Recreation relation in the exhibit. A data operation that changes one of the tuples for Student_ID 1003 must be performed. It is necessary to change one of the activities from swimming to tennis. The Student_ID and Activity attributes make up the primary key for the Recreation relation. All related information must be altered, as well. Which SQL statement or
A. UPDATE Recreation SET Activity, Activity_Fee (‘Tennis’,100) WHERE Student_ID = 1003;
B. UPDATE TABLE Recreation ALTER COLUMN ACTIVITY SET ACTIVITY = ‘Tennis’, Activity_Fee = 100 WHERE Student ID = 1003 AND Activity = wimming?AND Activity = ?wimming?
C. UPDATE Recreation SET Activity = ‘Tennis’, Activity_Fee = 100 WHERE Student_ID = 1003 AND Activity = ‘Swimming’;
D. DELETE Activity FROM Recreation WHERE Student_ID = 1003; INSERT
INTO Recreation VALUES (1003, ‘Tennis’, 100);
Answer: C
QUESTION: 35 Which process is used to prevent the current database operation from reading or writing a data item while that data item is being accessed by another operation?
A. Lock
B. Deadlock
C. Time stamp
D. Transaction
Answer: A
QUESTION: 36 Your company must choose which type of database to use for a new project. Which of the following lists three characteristics of file-based database systems?
A. Repetition of data, application program flexibility, and data centralization
B. Incompatibility of files, tabular data structures, and data dependence
C. Separation of data, repetition of data, and data independence
D. Application program inflexibility, data dependence, and separation of data
Answer: D
QUESTION: 37 Consider the Information Engineering diagram shown in the exhibit. Building_ID, R_ID, Room_Count and Room_Num are integer numbers, whereas Bldg_Name and Res_Name are represented by variable-length strings with a maximum of 20 characters. Location can be up to 50 characters long, and no building has more than 600 rooms. Which SQL statement best implements the BUILDING relation shown in this diagram?
A. CREATE TABLE BUILDING ( Building_ID NOT NULL PRIMARY KEY, Bldg_Name, Location, Room_Count);
B. CREATE TABLE BUILDING ( Building_ID NOT NULL PRIMARY KEY, Bldg_Name, Location, Room_Count, FOREIGN KEY Building_ID REFERENCES BUILDING (Building_ID));
C. CREATE TABLE BUILDING (Building_ID INTEGER NOT NULL PRIMARY KEY, Bldg_Name VARCHAR (20), Location VARCHAR (50),
D. CREATE TABLE BUILDING (Building_ID INTEGER NOT NULL PRIMARY KEY, Bldg_Name VARCHAR (20), Location VARCHAR (50), Room_Count INTEGER CHECK (Room_Count > Room_Count INTEGER CHECK ( -1 And Room_Count < 601)); Room_Count > -1 Or Room_Count < 601));
Answer: D
QUESTION: 38
Consider the following four database design activities:
1 – Design user views.
2 – Select a DBMS.
3 – Apply normalization.
4 – Determine entities.
Which choice shows the correct ordering of these activities, from first to last, by assigned
numbers?
A. 1,2,3,4
B. 3,4,1,2
C. 4,3,1,2
D. 4,2,3,1
Answer: D
QUESTION: 39
A large enterprise uses a two-tier database architecture and runs complex database applications.
Which term best describes the client in this system?
A. Fat client
B. Enterprise client
C. Thin client
D. Terminal client
Answer: A
QUESTION: 40 The exhibit shows a table called Activity Relation that relates a unique student identification number with a sports activity and a fee for participating in that activity. A student can participate in only one activity. The key for the relation is Student_ID. What consequence would occur if the tuple for Student_ID 1001 were removed?
A. An update anomaly would occur.
B. An insertion anomaly would occur.
C. A deletion anomaly would occur.
D. Both an insertion anomaly and a deletion anomaly would occur.
Answer: C
QUESTION: 41
Which of the following definitions best describes an entity?
A. A relation
B. Data about data
C. Data stored in a table column
D. An item about which information is stored
Answer: D
QUESTION: 42 Several SQL operations are performed by User 1 to access the Fee information for Bowling in the Act_Fee relation (shown in the exhibit). The first access returns a fee of 50. An unrelated SQL operation by another user updates the Bowling fee to 60. The second access by User 1 returns a fee of 60. What problem has occurred?
A. Rollback
B. Deadlock
C. Dirty read
D. No problem has occurred.
Answer: D
QUESTION: 43 Consider the entity-relationship (ER) diagram shown in the exhibit. What do the characters at the ends of the connecting line indicate?
A. Degree of a relation
B. Cardinality of a relation
C. Primary key of a relation
D. Determinant of a relation
Answer: B
QUESTION: 44 Consider the following SQL statement and the Orders relation shown in the exhibit: What is the output of this SQL statement? SELECT * FROM Orders WHERE NOT (Amount < 1000 AND Sales_Rep_No = 210);
A. A
B. B
C. C
D. D
Answer: D
QUESTION: 45
Consider the following DBDL description of an entity: Teachers (teach_num: variable length character string length 10 NOT NULL teach_name: variable length character string length 10 NOT NULL) Primary Key: teach_num which integrity constraint is satisfied?
A. Entity integrity
B. Necessary data
C. Referential integrity
D. Referential foreign integrity
Answer: A
QUESTION: 46 FROM Registration WHERE Consider the following relational algebraic expression: Which of the following SQL Course_Code = ‘A4343′; statements is equivalent to this relational algebraic expression?
A. SELECT Sales_Rep_No(108) FROM Orders;
B. INSERT INTO Orders VALUES(Sales_Rep_No = 108) WHERE Sales_Rep_No = NULL;
C. SELECT’FROM Orders WHERE Sales_Rep_No = 108;
D. SELECT’FROM Orders WHERE Sales_Rep_No = ?08?
Answer: C
QUESTION: 47 Consider the Registration relation shown in the exhibit. Which of the following SQL statements would return the Registration2 relation from the Registration relation?
A. SELECT Course_Code FROM Registration;
B. SELECT * FROM Registration WHERE Registration_ID = 1003 AND Registration_ID = 1005;
C. SELECT * FROM Registration WHERE Course_Code = ‘A4343’;
D. SELECT Registration_ID, Student_ID, First_Name, Last_Name
Answer: C
QUESTION: 48
Consider the Employee relation shown in the exhibit. A database manager wants to set up a
view called Emp_Dept that allows users to find employees and their department ID numbers.
Which SQL statement will accomplish this?
A. CREATE VIEW Emp_Dept AS SELECT Last_Name, First_Name, Dept_ID FROM Employee;
B. UPDATE VIEW Emp_Dept AS SELECT * FROM Employee;
C. UPDATE VIEW Emp_Dept AS SELECT Last_Name, First_Name, Dept_ID FROM Employee;
D. CREATE VIEW Emp_Dept AS SELECT * FROM Employee WHERE ID = 0001 AND ID = 0002 AND ID =
0003 AND ID = 0004;
Answer: A
QUESTION: 49
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