CIW v5 Database Design Specialist Question and Answers

CIW v5 Database Design Specialist

Last Update May 14, 2024
Total Questions : 124

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Questions 1

Which statement accurately describes a characteristic of attributes?

Options:

The ordering of attributes in a table is significant.

An attribute contains values from multiple domains.

An attribute name can be used only once per table.

An attribute name can be used only once in a relational database system with multiple tables.

Discussion 0

Questions 2

Consider the relation shown in the exhibit. Which of the following SQL statements would return a relation that excludes all customers with a Satisfaction_Rate of less than or equal to 80 unless the Sales_Office is located in Atlanta?

Options:

SELECT * FROM Customers

WHERE Satisfaction_Rate > 80

OR Sales_Office = Atlanta

SELECT * FROM Customers

WHERE Satisfaction_Rate <= 80

AND Sales_Office = Atlanta

SELECT * FROM Customers

WHERE Satisfaction_Rate >= 80;

SELECT * FROM Customers

WHERE Satisfaction_Rate >= 80

AND NOT Sales Office = Atlanta

Discussion 0

Questions 3

A large enterprise uses a two-tier database architecture and runs complex database applications.

Which term best describes the client in this system?

Options:

Fat client

Enterprise client

Thin client

Terminal client

Discussion 0

Questions 4

Consider the entity-relationship (ER) diagram shown in the exhibit. Which type of relationship between the two entities is shown?

Options:

A recursive relationship

A many-to-many relationship

A one-to-one relationship

A one-to-many relationship

Discussion 0

Questions 5

Your enterprise has created a database and database application. The testing phase for the project has started. Which of the following best describes white-box testing of the projects software?

Options:

The database designer tests the software because he or she is able to make necessary changes to the underlying code for the software.

A user who has no knowledge of the softwares underlying code tests the software.

Someone other than the database designer tests the software. This person has no access to the underlying code and attempts to use the software only in ways not considered by the software designers.

A person tests the software and submits suggestions to the software's underlying code. This person is someone other than the database designer, but has access to the softwares underlying code.

Discussion 0

Questions 6

Consider the following relational algebraic expression: Which of the following SQL statements is equivalent to this relational algebraic expression?

Options:

SELECT*FROM Customers,

Employees WHERE Sales_Rep_No = Cust_No;

SELECT Cust_No, Cust_Name, Emp_Name, Emp_Loc FROM

Customers, Employees WHERE Customers.Sales_Rep_No =

Employees.Sales_Rep_No;

SELECT Cust_No, Cust_Name, Emp_Name, Emp_Loc FROM

Customers, Employees WHERE Employees.Sales_Rep_No =

Customers.Sales_Rep_No;

SELECT * FROM Customers, Employees WHERE

Customers.Sales_Rep_No = Employees.Sales_Rep_No;

Discussion 0

Questions 7

Which relational algebraic operation is used to select specific columns (attributes) from a relation?

Options:

Union

Difference

Projection

Intersection

Discussion 0

Questions 8

Consider the Information Engineering diagram shown in the exhibit. Building_ID, R_ID, Room_Count and Room_Num are integer numbers, whereas Bldg_Name, Location and Res_Name are all represented by variable-length strings with a maximum of 20 characters.

Which SQL statement best implements the RESIDENT relation shown in this diagram?

Options:

CREATE TABLE RESIDENT (

R_ID INTEGER NULL PRIMARY KEY,

Room_Num FLOAT,

Res_Name VARCHAR,

Building_ID INTEGER NULL,

FOREIGN KEY Building_ID REFERENCES BUILDING (Building_ID));

CREATE TABLE RESIDENT (

R_ID INTEGER NOT NULL PRIMARY KEY,

Room_Num BINARY,

Res_Name VARCHAR (20),

Building_ID INTEGER NOT NULL,

FOREIGN KEY Building_ID REFERENCES BUILDING (Building_ID));

CREATE TABLE RESIDENT (

R_ID INTEGER NOT NULL PRIMARY KEY,

Room_Num INTEGER,

Res_Name VARCHAR (20),

Building_ID INTEGER NOT NULL);

CREATE TABLE RESIDENT (

R_ID INTEGER NOT NULL PRIMARY KEY,

Room_Num INTEGER,

Res_Name VARCHAR (20),

Building_ID INTEGER NOT NULL,

FOREIGN KEY Building_ID REFERENCES BUILDING (Building_ID));

Discussion 0

Questions 9

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?

Options:

Rollback

Deadlock

Dirty read

No problem has occurred.

Discussion 0

Questions 10

Which area of database security involves maintaining access to enterprise data?

Options:

Theft

Privacy

Availability

Confidentiality

Discussion 0

Questions 11

Which of the following best describes a composite key?

Options:

A composite key is a primary key that consists of the first two attributes of a relation.

A composite key is a primary or foreign key defined by its parent keys.

A composite key is a foreign key that consists of the same attributes as the primary key from a related table.

A composite key is a primary or foreign key that consists of two or more attributes of a relation.

Discussion 0

Questions 12

To create a view, what are the minimal privileges that a user must have for the relations used to make the view?

Options:

GRANT

REVOKE

SELECT

CREATE VIEW

Discussion 0

Questions 13

Consider the symbols shown in the exhibit. Which of the following correctly identifies these symbols when used in an entity-relationship (ER) diagram?

Options:

1 = attribute, 2 = entity, 3 = relationship

1 = entity, 2 = relationship, 3 = attribute

1 = relationship, 2 = entity, 3 = attribute

1 = relationship, 2 = attribute, 3 = entity

Discussion 0

Questions 14

Which term describes an attribute or combination of attributes that uniquely identifies a row in a relation?

Options:

Entity

Domain

Primary key

Attribute group

Discussion 0

Questions 15

For the Employee relation shown in the exhibit, which set of column value holds the complete tuple for the employee named James Smith?

Options:

0002, James, Smith

0002, James, Smith, 10-25-76

First_Name, James, Last_Name, Smith

Emp_ID, 0002, First_Name, James, Last_Name, Smith

Discussion 0

Questions 16

Consider the Dept1_Parts and Dept2_Parts relations shown in the exhibit. Which of the following SQL statements would create a set difference of the two relations with the widest variety of Structured Query Language dialects?

Options:

SELECT *FROM

Dept1_Parts

EXCEPT(SELECT

PartJD FROM

Dept2_Parts);

SELECT * FROM

Dept1_Parts MINUS

(SELECT Part_ID

FROM Dept2_Parts);

SELECT*FROM

Dept1_Parts

DIFFERENCE

(SELECT Part_ID

FROM Dept2_Parts);

SELECT*FROM

Dept1_Parts WHERE

Part_ID NOT IN

(SELECT Part_ID FROM

Dept2_Parts);

Discussion 0

Questions 17

Which term best defines a database system in which data records are stored in one or more files with no structured relationship?

Options:

Flat-file database

Relational database

Distributed database

Object-oriented database

Discussion 0

Questions 18

Your enterprise is involved in planning a database project. The exhibit shows the result of one phase of the database design life cycle. Which term best describes the diagram shown in the exhibit?

Options:

Information Engineering (IE) data model

Corporate data model

Database requirements model

ERD model

Discussion 0

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