IBM Assessment: DB2 9 Family Fundamentals : A2090-730

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IBM A2090-730 Exam Syllabus Topics:

IBM Assessment: DB2 9 Family Fundamentals Sample Questions:

1. Which of the following is NOT a difference between a unique index and a primary key?

A) Unique indexes can be defined over one or more columns; primary keys can only be defined on a single column.
B) A primary key is a special form of a unique constraint; both use a unique index.
C) Unique indexes can be defined over one or more columns that allow null values; primary keys cannot contain null values.
D) A table can have many unique indexes but only one primary key.

2. A sequence was created with the DDL statement shown below:
CREATE SEQUENCE my_seq START WITH 5 INCREMENT BY 5 CACHE 5
User1 successfully executes the following statements in Connection1: VALUES NEXT VALUE FOR my_seq INTO :con1hvar VALUES NEXT VALUE FOR my_seq INTO :con1hvar User2 successfully executes the following statement in Connection2: VALUES NEXT VALUE FOR my_seq INTO :con2hvar
After User1 & User2 are finished, User3 executes the following statement in Connection3:
SELECT NEXT VALUE FOR my_seq FROM sysibm.sysdummy1
Which value will be returned by the query?

A) 50
B) 25
C) 20
D) 55

3. Which of the following causes a lock that is being held by an application using the Cursor Stability isolation level to be released?

A) The row the cursor is on is deleted by another application
B) The cursor is moved to another row
C) The row the cursor is on is deleted by the application
D) The row the cursor is on needs to be updated by another application

4. Which of the following is TRUE for the DB2 isolation level Cursor Stability (CS)?

A) Any row that is read during a unit of work cannot be changed by other application processes until the unit of work is complete.
B) An application process acquires at least a share lock on the current row of every cursor.
C) An application process that issues the same query more than once in a unit of work will not see additional rows caused by other application processes appending new information to the database.
D) Any row changed by another application process can be read, even if the change has not been committed by that application process.

5. Given the following statement:
CREATE TABLE tab1
(col1 SMALLINT NOT NULL PRIMARY KEY,
col2 VARCHAR(200) NOT NULL WITH DEFAULT NONE,
col3 DECIMAL(5,2) CHECK (col3 >= 100.00),
col4 DATE NOT NULL WITH DEFAULT)
Which of the following definitions will cause the CREATE TABLE statement to fail?

A) COL3
B) COL4
C) COL2
D) COL1

Solutions: