ibm db2 udb v8.1 family fundametals

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1.A unit of work is using an isolation level of Read Stability. An entire table is scanned twice within the unit of work. Which of the following can be seen on the second scan of the table?

A.Rows removed by other processes

B.Rows added to a result set by other processes

C.Rows changed in a result set by other processes

D.Rows with uncommitted changes made by other processes

Correct:B

2.Given the following two tables: TAB1 TAB2 C1 C2 CX CY ------ ----- ----- ------ A 11 A 21 B 12 C 22 C 13 D 23 The following results are desired: C1 C2 CX CY ------ ----- ----- ------ A 11 A 21 B 12 - - C 13 C 22 Which of the following joins will yield the desired results?

A.SELECT * FROM tab1 INNER JOIN tab2 ON c1=cx

B.SELECT * FROM tab2 LEFT OUTER JOIN tab1 ON c1=cx

C.SELECT * FROM tab2 FULL OUTER JOIN tab1 ON c1=cx

D.SELECT * FROM tab1 LEFT OUTER JOIN tab2 ON c1=cx

Correct:D