DATABASE MANAGEMENT APPLICATIONS EXAM PRE-ASSESSMENT AND OBJECTIVE ASSESMENT

WGU D427 DATABASE MANAGEMENT APPLICATIONS
EXAM PRE-ASSESSMENT AND OBJECTIVE ASSESMENT |
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How many attributes are present in the address fragment?

-1
-2
-3
-4
3
2. The Patient table has the following columns:

first_name varchar(20)
last_name varchar (30)
birthdate date
patient_id int

Which column should be designated as the primary key for the Patient table?

- first_name
- last_name
- birthdate
- patient_id
patient_id
3. The Exam table has the following columns:
exam_id int
exam_date date
exam_reason varchar(100)
patient_number int

Which column should be designated as the foreign key for the Exam table?

- exam_id
- exam_date
- exam_reason
- patient_id
patient_id

,4. Which data type represents numbers with fractional values:

- varchar
- integer
- binary
- decimal
decimal
5. Which of the following is a DDL (Data Definition Language) command?

- INSERT
- SELECT
- CREATE INDEX
- UPDATE
CREATE INDEX

CREATE, ALTER, DROP
6. Which of the following is a DML (Data Manipulation Language) command?

- CREATE VIEW
- CREATE TABLE
- INSERT
- ALTER INDEX
INSERT
7. Patient Table
PK patient id
first name
last name
birthdate

Exam Table
PK exam id
exam date
exam reason
FK patient id

CREATE TABLE Exam (
exam_id INT NOT NULL AUTO_INCREMENT,
exam_date DATE NOT NULL,
exam_reason VARCHAR(100),
patient_id INT NOT NULL,

,PRIMARY KEY (exam_id),
FOREIGN KEY (patient_id) REFERENCES Patient (patient_id) ON DELETE CASCADE
);

What would happen to exams in the Exam table that are linked to a patient if that patient is
deleted?

- Those exams would remain in the database
- Those exams would be deleted also
- The Patient ID for those exams would be changed to NULL
- Nothing would happen
Those exams would be deleted also
8. Patient Table
PK patient id
first name
last name
birthdate

Exam Table
PK exam id
exam date
exam reason
FK patient id

CREATE TABLE Exam (
exam_id INT NOT NULL AUTO_INCREMENT,
exam_date DATE NOT NULL,
exam_reason VARCHAR(100),
patient_id INT NOT NULL,
PRIMARY KEY (exam_id),
FOREIGN KEY (patient_id) REFERENCES Patient (patient_id) ON DELETE RESTRICT
);

What would happen to exams in the Exam table that are linked to a patient if that patient is
deleted.

- Those invoices would remain in the database
- Those invoices would be deleted also
- The Customer ID for those invoices would be changed to NULL
- The delete of the Customer would not be allowed
The delete of the Customer would not be allowed

, 9.
Patient Table
PK patient id
first name
last name
birthdate
Exam Table
PK exam id
exam date
exam reason
FK patient id
CREATE TABLE Exam (
exam_id INT NOT NULL AUTO_INCREMENT,
exam_date DATE NOT NULL,
exam_reason VARCHAR (100),
patient_id INT NOT NULL,
PRIMARY KEY (exam_id),
FOREIGN KEY (patient_id) REFERENCES Patient (patient _id) ON DELETE SET TO
NULL );
what would happen to exams in the Exam table that are linked to a patient if that patient is
deleted.
Those invoices would remain in the database.
Those invoices would be deleted also.
The Customer ID for those invoices would be changed to NULL.
The delete of the Customer would not be allowed.
The Customer ID for those invoices would be changed to NULL
10.
Which of the following are true about materialized view (Choose 2)?

- It is a base table.