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IBM DB2 9 Family Fundamentals Sample Questions:

1. Application A holds an Update lock on a single row and application B is trying to read that row. If both applications are using isolation level UR, which of the following will occur?

A) Applications A and B will cause a deadlock situation.
B) Application B will read the row.
C) Application A will be terminated so that application B can read the row.
D) Application B will wait until applicationA releases the Update lock.

2. If the following SQL statements are executed:
CREATE TABLE make (makeid SMALLINT NOT NULL PRIMARY KEY,
make VARCHAR(25));
CREATE TABLE model (modelid SMALLINT,
model VARCHAR(25),
makeid SMALLINT,
CONSTRAINT const1 FOREIGN KEY (makeid)
REFERENCES make(makeid) ON DELETE RESTRICT);
And each table created is populated as follows:
MAKE
MAKEID MAKE
1 Ford 2 Chevrolet 3 Toyota
MODEL
MODELID MODEL MAKEID
1 Mustang 1 2 Escort 1 3 Malibu 2 4 Camry 3
If the following SQL statement is executed:
DELETE FROM make WHERE makeid = 1
What is the total number of rows that will be deleted?

A) 3
B) 2
C) 0
D) 1

3. If table TAB1 is created using the following statement:
CREATE TABLE tab1 (col1 INTEGER NOT NULL,
col2 CHAR(5),
CONSTRAINT cst1 CHECK (col1 in (1, 2, 3)))
Which of the following statements will successfully insert a record into table TAB1?

A) INSERT INTO tab1 VALUES (NULL, 'abc')
B) INSERT INTO tab1 VALUES (DEFAULT, 'abc')
C) INSERT INTO tab1 VALUES (ABS(2), 'abc')
D) INSERT INTO tab1 VALUES (0, 'abc')

4. Which of the following are all valid DB2 data types?

A) NUMERIC, TIMESTAMP, BYTE, FLOAT
B) DECIMAL, DATE, DBCLOB, INTERVAL
C) LONG VARCHAR, SMALLINT, NUMBER, BLOB
D) NUM, TIME, XML, DOUBLE

5. Given the following table definition:
SALES
INVOICE_NO CHAR(20) NOT NULL
SALES_DATE DATE
SALES_PERSON VARCHAR(25)
REGION CHAR(20)
SALES_AMT DECIMAL(9,2)
Which of the following queries will return SALES information, sorted by SALES_PERSON, from A
to Z, and SALES_DATE, from most recent to earliest?

A) SELECTinvoice_no, sales_person, sales_date, sales_amt FROM sales ORDER BY sales_person, sales_date DESC
B) SELECTinvoice_no, sales_person, sales_date, sales_amt FROM sales SORT BY sales_person DESC, sales_date
C) SELECTinvoice_no, sales_person, sales_date, sales_amt FROM sales ORDER BY sales_person DESC, sales_date
D) SELECTinvoice_no, sales_person, sales_date, sales_amt FROM sales SORT BY sales_person, sales_date DESC

Solutions: