DB2 考试 provides a self-test with 27 multiple choice questions covering various topics related to DB2. The questions test knowledge of topics like DB2 products, utilities, SQL statements, isolation levels, locking, and more. Sample questions include identifying the correct DB2 product required to access a DB2 for OS/390 database from AIX, how to catalog a remote database, and which SQL statement would display data from multiple tables with an outer join.