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D427 Practice Test 1 Data Management - Applications with Answer Key,100% CORRECT
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D427 Practice Test 1 Data Management - Applications with Answer Key
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lOMoARcPSD|43502630lOMoARcPSD|43502630
D427 Practice Test 1 Data Management - Applications with
Answer Key
D427 Practice Test
1. Seattle, WA
98111 USA
How many attributes are present in the address fragment?
a. 1
b. 2
c. 3
d. 4
2. The Book table has the following
columns: genre – varchar (20)
pages – integer
author_id –
char(3)
isbn _ number – varchar (20)
Which column should be designated at the primary key for the Book table?
a. genre
b. pages
c. author_id
d. isbn_number
3. The Book table has the following
columns: genre – varchar (20)
pages – integer
author_id –
char(3)
isbn_number – varchar(20)
Which column should be designated at the foreign key for the Book table?
a. genre
b. pages
, lOMoARcPSD|43502630
c. author_id
d. isbn_number
4. Which data type represents numbers with fractional values:
a. Integer
b. Decimal
c. Character
d. Binary
, lOMoARcPSD|43502630
5. Which of the following are DDL commands?
a. INSERT
b. SELECT
c. CREATE INDEX
d. UPDATE
6. Which of the following is a DML command?
a. CREATE VIEW
b. CREATE TABLE
c. INSERT
d. ALTER INDEX
7.
CREATE TABLE Invoice (
invoice_id INT NOT NULL AUTO_INCREMENT,
date DATE NOT NULL,
customer_id INT NOT NULL,
PRIMARY KEY (invoice_id),
FOREIGN KEY (customer_id) REFERENCES Customer (customer_id) ON DELETE
CASCADE
);
Looking at the Customer and Invoice tables and the CREATE TABLE for the
Invoice table with foreign key reference statement above, what would happen
to invoices in the Invoice table that are linked to a customer if that customer is
deleted.
a. Those invoices would remain in the database.
b. Those invoices would be deleted also.
c. The Customer ID for those invoices would be changed to NULL.
d. Nothing would happen.
, lOMoARcPSD|43502630
Customer ID (PK) Invoice ID
Customer Last Name (PK) Date
Customer First Customer ID (FK)
Name Street
Address
City
Stat
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