C Exam code: C Exam name: IBM DB2 11 DBA for z/os. Version 15.0

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1 C Number: C Passing Score: 800 Time Limit: 120 min File Version: Exam code: C Exam name: IBM DB2 11 DBA for z/os Version 15.0

2 C QUESTION 1 Which two options can be specified in order to access a system-period temporal table for a specific point in time guaranteeing accurate results? A. A period-specification placed in the FROM clause of a subselect. B. A period-specification placed in the WHERE clause of a subselect C. A SELECT statement predicate against the transaction start ID of the base table. D. A predicate against the start and end columns of the base table placed in the WHERE clause of a subselect. E. A SET of the CURRENT TEMPORAL SYSTEM_TIME special register to a non-null value prior to a SELECT against the temporal table. E QUESTION 2 As part of a health check, it is determined that the statistics feedback should be externalized more frequently. Optimizer statistics recommendations can be immediately externalized to the DB2 catalog by performing what action? A. Issue the ACCESS command with appropriate keywords. B. Issue the ARCHIVE command with the appropriate keywords. C. Issue the STOP command for the appropriate set of statistics. D. Issue the ALTER command with the appropriate memory location. Correct Answer: A QUESTION 3 Prefetch l/os are executed under a service request block in which address space? A. IRLM B. DBM1 C. MSTR D. User address space QUESTION 4 A hotel prices its rooms differently at different times of the year. For example, Room 101 rents for $100 per night January through March, $150 per night April through September, and $80 per night October through December. Which type of table could be used to implement the time-based rate changes?

3 A. A rate-period temporal table B. A range-based temporal table C. A system-period temporal table D. An application-period temporal table QUESTION 5 If the OPTHINTS subsystem parameter is set to YES, and you issue the following DB2 command relating to optimization parameter hints: BIND QUERY LOOKUP (YES) what is the result of the execution of this command? A. A list of queries that are in error is produced. B. Updated values are placed in SYSIBM.SYSQUERY and SYSIBM.SYSQUERYPLAN tables. C. New values are inserted into the SYSIBM.SYSQUERY and SYSIBM.SYSQUERYPLAN tables. D. Messages containing only the status of rows in catalog tables SYSIBM.SYSQUERY and SYSIBM.SYSQUERYPLAN. Reference: 01.ibm.com/support/knowledgecenter/SSEPEK_11.0.0/com.ibm.db2z11.doc.comref/src/tpc/db2z _cmd_bindquery.dita?cp=ssepek_11.0.0%2f QUESTION 6 What is necessary in order to enable optimization hints? A. ASYSIBM.PLAN_TABLEtable. B. INSERT authority on SYSIBM.SYSQUERY table. C. A required index on the PLAN_TABLE used for optimization hints. D. ADSN USERQUERY TABLE table under the schema in which hints will be created. QUESTION 7 Which command populates the EXPLAIN tables but does not create a package?

4 A. REBINDCOPY B. REBINDEXPLAIN(NO) C. REBINDEXPLAIN(YES) D. REBIND EXPLAIN(ONLY) Reference: 01.ibm.com/support/knowledgecenter/SSEPEK_11.0.0/com.ibm.db2z11.doc.comref/src/tpc/db2z _bindoptexplain.dita QUESTION 8 The TCP/IP Already Verified (TCPALVER) DB2 system parameter controls whether DB2 accepts a TCP/IP connection requests. Which statement is NOT a valid value? A. TCPALVER=NO B. TCPALVER=YES C. TCPALVER=SERVER_SECURE D. TCPALVER=SERVERENCRYPT QUESTION 9 Which global variables statement is true? A. A global variable is a synonym for special registers. B. Like for special registers, the access to global variables cannot be granted or revoked. C. A global variable is a created DB2 object, which can be instantiated and used by applications. D. Global variables can only be used in native SQL stored procedures and user-defined functions. QUESTION 10 Which DB2 subsystem parameter limits the number of concurrent active TSO requests? A. IDBACK B. IDFORE C. MAXDBAT D. CONDBAT

5 QUESTION 11 An Audit report shows that data on the CUSTOMER table was successfully updated by an unknown USERID. What other DB2 supplied information could be reviewed to learn more about the updated data? A. BSDS B. SYSIBM.SYSPACKDEP C. DB2 Active and Archive Logs D. SYSIBM.SYSAUDITPOLICIES QUESTION 12 You want to create a table space without actually creating the underlying data sets until rows are inserted into the corresponding table. Which CREATE TABLESPACE statement option and value should you use? A. PRIQTYO B. PRIQTY-1 C. DEFINE NO D. DEFER YES QUESTION 13 Which component is NOT shared between DB2 data sharing members? A. SCA B. IRLM C. DB2 catalog D. DB2 directory QUESTION 14 You are having problems accessing SYSIBM.SYSTABLES in your data sharing environment and you want to know who is using the table space DSNDB06.SYSTSTAB. How would you find this information? A. -DIS THREAD (') TYPE(SYSTEM) B. -DIS DB(DSNDB06) SP(SYSTSTAB) USE

6 C. -DIS GROUPBUFFERPOOL(GBPO) CONNLIST(YES) D. -DIS BUFFERPOOL (BPO) DB(DSNDB06) SP(SYSTSTAB) LIST(ACTIVE) QUESTION 15 A table space is successfully recovered by using RECOVER TABLESPACE db. ts TOLASTFULLCOPY. This table space is referenced by an index. Which statement is true? A. The index has now a status of REFP. B. The index has now a status of RECP. C. The index has now a status of CHKP. D. The index has now a status of RBDP. QUESTION 16 What is the maximum partition size for a table space created with NUMPARTS 128, a page size of 8K, and a default DSSIZE of 4G? A. 1G B. 2G C. 4G D. 8G QUESTION 17 Which statement regarding triggers is true? A. A trigger can use global variables and change their contents. B. A trigger can use global variables but cannot change their contents. C. A trigger cannot use global variables but can change their contents. D. A trigger cannot use global variables and cannot change their contents. QUESTION 18

7 What is a general recommendation for when to rebind? A. After a backup is taken. B. After a subsystem restart. C. Before maintenance is applied. D. After a major change in data volume. QUESTION 19 A statement-level access path hint can be applied to which type of SQL statement? A. Static SQL statements only. B. Dynamic SQL statements only. C. Both static and dynamic SQL statements. D. Statements included in a CREATE PROCEDURE statement only. QUESTION 20 Which is NOT a valid privilege/authority for executing CREATE TYPE (array)? A. SYSADM B. SYSOPR C. SYSCTRL D. CREATEIN on the schema Correct Answer: A QUESTION 21 You want to determine which objects of your database DB1 are in LPL. What command should be used? A. -DIS DB(DB1) SP(') ADVISORY(LPL) LIMIT(') B. -DIS DB(DB1) SP(') RESTRICT(LPL) LIMIT(') C. -DIS DB(DB1) SP(') ADVISORY(LPL) LIMIT(") SCOPE(GROUP) D. -DIS DB(DB1) SP(') RESTRICT(LPL) LIMIT(') SCOPE(GROUP)

8 QUESTION 22 An application receives an 00C90110 reason code. See the following manual explanation of the code. " 00C90110:The data manager detected an inconsistent data condition. This may be caused by an inconsistency in either the DB2P' catalog or the DB2 directory. In this case, the OBD for the requested OBID cannot be located in the database descriptor (DBD). The DBD in storage may be inconsistent. Specifically, the OBDDMAP(OBID) array element should contain an offset into the DBD where the OBD should be located. However, in this case the OBD expected was not at the indicated offset.to prevent further damage and possible loss of data, the inconsistency must be corrected before any further SQL access is attempted to this database." Even though the problem cannot be recreated, you still want to find out what caused this and you want to collect additional information for the IBM support team. Which utilities and service aids CANNOT help to provide useful additional info to diagnose the problem? A. REPAIR B. REPORT C. DIAGNOSE D. DSN1LOGP QUESTION 23 The degree of parallelism can vary for the REBUILD INDEX utility. What action should be taken to limit the use of real memory using the REBUILD INDEX utility? A. Increase the value of the PARALLEL option. B. Decrease the value of the PARALLEL option. C. Increase the value in the CURRENT DEGREE special register. D. Decrease the value in the CURRENT DEGREE special register. Correct Answer: A QUESTION 24 Which is NOT a valid value for the KEYWORDS column in the DSN_PROFILES_ATTRIBUTES table? A. MONITOR THREAD B. MONITOR IDLE THREADS C. MONITOR CONNECTIONS D. MONITOR ACTIVE THREADS QUESTION 25

9 What keyword establishes the maximum partition size of a partition-by-growth universal table space? A. PART B. DSSIZE C. SEGSIZE D. MAXPARTITIONS QUESTION 26 Which table characteristic is a good attribute for the exploitation of hash access? A. At least 20 rows fit on a data page. B. DB2 uses range scans to access rows in the table. C. The size of individual rows in the table vary greatly. D. DB2 uses sequential lookups to access data in the table. QUESTION 27 What subsystem parameter in DDF specifies the maximum number of inactive or new connections queued that can be waiting for a DBAT to process the request? A. IDTHTOIN B. MAXDBAT C. CONDBAT D. MAXCONQN QUESTION 28 From where does the cross-loader function allow you to load data? A. From an input file including all columns. B. From a cursor including LOB columns but not including XML columns. C. From a cursor including XML columns but not including LOB columns. D. From a cursor including all LOB and XML columns except the ROWID column. Correct Answer: A

10 QUESTION 29 When performing several inserts into a table defined with an identity column, which attribute could be ALTERed to help with the performance? A. RESET B. CACHE C. MAXVALUE D. INCREMENT QUESTION 30 Which DB2 Client command can be used to identify the Client's version? A. db2fm B. db2look C. db2level D. db2ldcfg QUESTION 31 What is the minimum buffer pool page size for a compressed index? A. 4K B. 8K C. 16K D. 32K Correct Answer: A QUESTION 32 What can you accomplish with the stored procedure ADMIN_UTL_MONITOR? A. This stored procedure helps you monitor currently running threads. B. You can create a detailed report of currently running and stopped utilities. C. This stored procedure materializes SYSIBM.SYSSTATFEEDBACK for the page sets you specify as input parameter. D. You can create RUNSTATS profiles and RUNSTATS recommendations for DB2 tables in your DB2 subsystem.

11 Reference: 01.ibm.com/support/knowledgecenter/SSEPEK_11.0.0/com.ibm.db2z11.doc.perf/src/tpc/db2z_s p_adminutlmonitor.dita?cp=ssepek_11.0.0%2f QUESTION 33 Which DB2 subsystem parameter is used to control the number of concurrent inbound DDF connections? A. MAXDBAT B. CTHREAD C. CONDBAT D. CONTSTOR QUESTION 34 Which technique can be utilized for the reporting of real-time statistics? A. Call stored procedure SYSPROC.DSNACCOX. B. Call stored procedure SYSPROC.ADMINJNFOJHOST. C. Query the SYSI BM.SYSTABSTATS system catalog table. D. Query the SYSIBM.SYSTABLES_PROFILES system catalog table. QUESTION 35 You are trying to reduce the transaction CPU cost by using KEEPDYNAMIC(YES). Which subsystem parameter would you increase to improve Local Dynamic Cache Hit Ratio and reduce the number of short prepares? A. MAXRBLK B. MAXKEEPD C. MAXTEMPS D. CONTSTOR QUESTION 36 DB2 will not allow certain processing to occur when the soft limit of RBA TFF 'x is reached and an object's RBA remains in basic 6-byte format. What processing is NEVER allowed?

12 A. Changes to the BSDS. B. RECOVER to CURRENT. C. REORG with RBALRSN_CONVERSION EXTENDED. D. SQL update activities (INSERT. UPDATE, DELETE, MERGE). Reference: 01.ibm.com/support/knowledgecenter/SSEPEK_11.0.0/com.ibm.db2z11.doc.admin/src/tpc/db2z _rbalrsnlimitsreached.dita QUESTION 37 You have defined the array type PHONENUMBERS using the following DDL: CREATE TYPE PHONENUMBERS AS DECIMAL(10,0) ARRAY[50]; You also defined a variable named RECENT_CALLS based on this new array type as follows: CREATE VARIABLERECENT_CALLS PHONENUMBERS: Which SQL statement would you use to set the variable LIST_SIZE to the maximum array size allowed for the variable RECENT_CALLS? A. SET LIST_SIZE = MAX(RECENT_CALLS) B. SET LIST_SIZE = ARRAY_MAX(RECENT_CALLS) C. SET LIST_SIZE = ARRAY_LAST(RECENT_CALLS) D. SET LIST_SIZE = MAX_CARDINALITY(RECENT_CALLS) QUESTION 38 Which group of DB2 ACCOUNTING trace CLASSES must be started to collect accounting information for PLANS and PACKAGES? A. CLASS(2, 7,8) B. CLASS(1, 2,3) C. CLASS(1, 5,10) D. CLASS(1, 2, 3,7,8) QUESTION 39 What catalog table provides the information about missing or conflicting catalog statistics for SQL statements? A. SYSIBM.SYSGUERYSEL B. SYSIBM.SYSTATFEEDBACK C. SYSIBM.SYSVARIABLES_TEXT

13 D. SYSIBM.SYSOUERYPREDICATE QUESTION 40 When would DB2 NOT use list prefetch? A. Fast log apply operations. B. Reading leaf pages of a disorganized index. C. RUNSTATS TABLESPACE without table sampling. D. Incremental image copies of a table space defined with TRACKMOD YES. QUESTION 41 Which DB2-supplied stored procedure captures statistics and DDL for DB2 objects, extracts subsystem parameters and explain information for queries and applications, and returns the results in a data set or as a result set? A. ADMIN_INFO_SQL B. ADMIN_JOB_QUERY C. ADMIN_INFO_SYSPARM D. ADMIN UPDATESYSPARM Reference: (page 72, see the table) QUESTION 42 What is required before you begin your installation of DB2 11? A. Data sets for catalog and directory tables must be user-managed. B. Data sets for only the catalog tables must be SMS-managed and include a data class for allocating the data sets in extended format. C. Data sets for only the directory tables must be SMS-managed and include a data class for allocating the data sets in extended format. D. Data sets for catalog and directory tables must be SMS-managed and include a data class for allocating the data sets in extended format. Correct Answer: A

14 QUESTION 43 Which SQL statement can be used to create a data type that will represent possible speed limit values, with valid values not greater than 99, and to create a table that contains route numbers and the maximum speed limit for each route? A. CREATE TYPE SPEEDJJMIT AS SMALLINT; CREATE TABLE STATE_HIGHWAYS (ROUTE_NO SMALLINT, MAX_SPEED SPEEDJJMIT); B. CREATE TYPE SPEEDJJMIT AS DECIMAL(2.0); CREATE TABLE STATEJHIGHWAYS (ROUTE_NO SMALLINT. MAX_SPEED SPEEDJJMIT); C. CREATE TYPE SPEEDJJMIT AS DECIMAL(2.0); CREATE TABLE STATEJHIGHWAYS (ROUTE_NO SMALLINT. SPEED_LIMIT); D. CREATE TYPE SPEEDJJMIT USING DECIMAL(2.0); CREATE TABLE STATE_HIGHWAYS (ROUTE_NO SMALLINT. MAX_SPEED SPEED_LIMIT); QUESTION 44 When defining a check constraint on a populated table and the value of the special register CURRENT RULES is 'DB2'. What is the result of executing the DDL statement? A. It is rejected by the database system. B. The table space is placed in CHKP status. C. It is checked against only all existing rows in the table. D. It is checked against only new rows as they are added to the table. QUESTION 45 DB2 AUDIT policies are defined by inserting rows into what DB2 Catalog table? A. SYSIBM.SYSDBAUTH B. SYSIBM.SYSAUTOALERTS C. SYSIBM.SYSAUDITPOLICIES D. SYSIBM.SYSTABLESPROFILES Reference: 01.ibm.com/support/knowledgecenter/SSEPEK_11.0.0/com.ibm.db2z11.doc.seca/src/tpc/db2z_s ecadmauthority.dita (9th bullet) QUESTION 46 You analyze an accounting report. You see a high "NOT ACCOUNTED" time. Which two events can contribute to this high value?

15 A. CPU wait time. B. I/O read wait time. C. Log write wait time. D. Real storage paging wait time. E. Execution unit switch wait time. E QUESTION 47 You want to convert a segmented table space into a partition-by-growth table space. You execute the following ALTER statement: ALTER TABLESPACE DB1TS1 MAXPARTITIONS 5; What should be your next step? A. COPY the table space. B. REORG the table space. C. REBUILD all of the indexes. D. DROP the segmented table space. QUESTION 48 Which statement is true regarding table-controlled partitioned table spaces without a MAXVALUE specified? A. If the partitioning key is ascending, DB2 prevents the INSERT of a row with a null value for the key column. B. If the partitioning key is descending, DB2 prevents the INSERT of a row with a null value for the key column. C. If the partitioning key is ascending, DB2 allows the INSERT of a row with a null value for the key column. The row is inserted into the first partition. D. If the partitioning key is descending, DB2 allows the INSERT of a row with a null value for the key column. The row is inserted into the last partition. QUESTION 49 Which statement is true? A. Unicode and EBCDIC have a different collating sequence. B. The collating sequence for ASCII and EBCDIC is identical. C. The collating sequence for Unicode and EBCDIC is identical.

16 D. If you use BETWEEN in your SQL statement, the collating sequence does not matter for the predicate evaluation. Correct Answer: A Reference: 01.ibm.com/support/knowledgecenter/SS4LQ8_3.1.0/com.ibm.datatools.aqt3.doc/gui/concepts/c _idaa_inconsistencies.html (first bulleted point on the page) QUESTION 50 You must be able to process recoveries for DB2 objects to any point in time between now and two weeks ago. What is the recommended amount of recovery data needed? A. One set of SHRLEVEL(CHANGE) full image copies every two weeks that are kept for at least two weeks. B. One set of SHRLEVEL(CHANGE) full image copy at least every week that are kept for at least three weeks as well as the active/archive logs during that time. C. One set of SHRLEVEL(CHANGE) full images copies at least every week that are kept for at least two weeks as well as the active/archive logs during that time. D. One set of SHRLEVEL(CHANGE) full images copies during week#1 and one set of SHRLEVEL (REFERENCE) incremental images copies during week #2, all are kept for at least two weeks. Reference: %20%20at% 20KBC.pdf (page 10) QUESTION 51 Which type of stored procedures do NOT require a WLM-managed stored procedure address space? A. External stored procedures. B. Native SQL stored procedure. C. External SQL stored procedures. D. DB2 supplied stored procedures. QUESTION 52 When we use multilevel-security using a security label column, which sentence is true? A. A unique constraint is allowed on a security label column. B. A check constraint is not allowed on a security label column. C. A referential constraint is not allowed on a security label column. D. Multilevel security with row-level checking is enforced when DB2 checks a referential constraint.

17 QUESTION 53 Arrays are based on a built-in data type. On which built-in data type can an array NOT be based? A. XML B. CLOB C. DBCLOB D. VARBINARY Correct Answer: A