IBM C2090-546 問題集

質問 1：
Given the following DDL statements:

What is the end result of the CREATE UNIQUE INDEX statement?
A. TBSP21 and TBSP22 will each contain one local index.
B. TBSP21 will contain one index because NEW_IDX is not partitioned and will automatically go into the first index partition listed in the create table statement.
C. TBSP11 and TBSP12 will each contain one local index since the local indexes will physically reside in the same table space as the related data.
D. INDEX_TS will contain one non-partitioned index.
正解：D

質問 2：
Which of the following SQL statements will return monitoring information of all indexes in the DB2USER schema that have greater than 100 index scans?
A. SELECT * FROM TABLE(mon_get_index('DB2USER',100,-2))
B. SELECT * FROM TABLE(mon_get_index(' ',100,-2))
C. SELECT * FROM TABLE(mon_get_index(' ','DB2USER',-2)) WHERE index_scans > 100
D. SELECT * FROM TABLE(mon_get_index('DB2USER',' ',-2)) WHERE index_scans > 100
正解：D

質問 3：
Table TAB_A and index TABA_IDX were created by executing these SQL statements:

If this SQL statement is executed after 100,000 records have been inserted into table TAB_A:
ALTER INDEX taba_idx COMPRESS NO;
Which statement correctly describes what will happen to index TABA_IDX?
A. The index will remain compressed until it is REORGed.
B. The index will remain compressed until the COMPRESS attribute for table TAB_A has been set to NO and both the table and the index have been REORGed.
C. The index will be uncompressed immediately.
D. The index will remain compressed until the COMPRESS attribute for table TAB_A has been set to NO.
正解：A

質問 4：
When using an SQL UPDATE statement on an XML column, which statement is valid?
A. An SQL UPDATE statement cannot be used on an XML column.
B. An SQL UPDATE statement can update an XML column using an XMLQUERY transform expression.
C. An SQL UPDATE statement on an XML column must supply the complete new XML document.
D. An SQL UPDATE statement can modify a portion of an XML column using the SUBSTR function.
正解：B

質問 5：
A range-partitioned table TAB1 has been created with COL1 and COL2 with COL1 as the partitioning column. What is the result of running the following statement? CREATE UNIQUE INDEX xcol2 ON tab1(col2) PARTITIONED
A. The uniqueness will be enforced locally within each partition.
B. The index will be created as a non-unique index and a warning will be returned.
C. The statement will be rejected and an error will be returned.
D. The index will be created as a unique non-partitioned index and a warning will be returned.
正解：C

質問 6：
If DB2 load operation is performed against a table which contains at least one XML column, which statement is true?
A. One compression dictionary is built for relational data, one compression dictionary is built for XML data, and one compression dictionary is built for both relational and XML data.
B. One compression dictionary is built for relational data and one compression dictionary is built for the XML data.
C. One compression dictionary is built for both relational data and for XML data.
D. One compression dictionary is built for relational data, XML data is not compressed.
正解：B

質問 7：
You have created a Trusted Context by using following command:

What is the ENCRYPTION type for the '9.26.146.201' address, the AUTHENTICATION type for
PUBLIC, and is MYCTX enabled?
A. High, WITHOUT AUTHENTICATION, No
B. None, WITHOUT AUTHENTICATION, Yes
C. None, WITH AUTHENTICATION, No
D. High, WITH AUTHENTICATION, Yes
正解：B

質問 8：
If the statement concentrator is enabled and dynamic SQL is running, which statement is correct?
A. The statement concentrator is disabled when REOPT ALWAYS is specified.
B. The statement concentrator can only be used with OLTP workloads or applications.
C. The statement concentrator can only be used with DWH or DSS workloads or applications.
D. The statement concentrator only works with JDBC and CLI connections.
正解：A