At which of the following times is the access control authorization routine (DSNX@XAC) invoked?

Where would the optimizer gather information to estimate the amount of prefetching for a tablespace?

What condition would lead to distribution statistics not being collected?

What should be considered when specifying an optimization level?

What two types of configuration files does DB2 use?

If your columns are indexed, what clause would you run for the RUNSTATS command to collect statistics?

Is the parameter, “database_memory” configured automatically?

Which allows index data to be stored on separate devices from table data?

Given the following statements: CREATE TABLE T1 (COL1 INT NOT NULL PRIMARY KEY, COL2 CHAR, COL3 CLOB (40K), COL4 VARCHAR(10)); CREATE UNIQUE INDEX IND_1 ON T1 (COL1, COL2) INCLUDE (COL3) ALLOW REVERSE SCANS; The CREATE UNIQUE INDEX statement will fail because:

What technique can be used to reduce the number of calculations in a query?

What does it mean if the the null indicator = 0