Pass IBM C2090-612 Exam Number: C2090-612 Passing Score: 800 Time Limit: 120 min File Version: 37.4 http://www.gratisexam.com/ Exam Code: C2090-612 Exam Name: DB2 10 DBA for z/os
Certkey QUESTION 1 Workload Manager (WLM) manages how many concurrent stored procedures can run in an address space and the number of concurrent stored procedures in an address space cannot exceed the value of the NUMTCB parameter. Which statement about the value of NUMTCB is correct? A. NUMTCB parameter must be set to 1 for Java stored procedures. B. NUMTCB parameter must be set to 1 for REXX stored procedures. C. NUMTCB parameter can be a value greater than 1 for native SQL stored procedures. D. NUMTCB parameter can be a value greater than 1 when a stored procedure invokes DB2 utilities. /Reference: : QUESTION 2 If a single row of the PLAN_TABLE has a 'Y' value in more than one of the sort composite columns, what is indicated? A. The next sort step will perform two sorts. B. There are multiple sorts in the plan step. C. One sort in the plan step will accomplish two tasks. D. Two sorts are performed on the new table of a star join. /Reference: : QUESTION 3 The EXPLAIN STMTCACHE ALL statement provides information about SQL tuning. Which information is part of the DSN_STATEMENT_CACHE_TABLE? A. Filter factor information. B. Stage 1 and stage 2 information. C. Number of columns used in an index. D. Number of times an SQL statement is executed. /Reference: : QUESTION 4 What trace class will show deadlock information? A. Audit class 3.
B. Statistic class 3. C. Accounting class 1. D. Performance class 8. /Reference: : QUESTION 5 What is a consideration when specifying DATA CAPTURE CHANGES? A. Can be specified for capturing changes to an XML object. B. To minimize logging, specify NOT LOGGED when DATA CAPTURE CHANGES is specified. C. REFRESH TABLE statement is not allowed with a table defined with DATA CAPTURE CHANGES. D. You cannot turn on DATA CAPTURE CHANGES if the table space is in advisory REORG- pending. /Reference: : QUESTION 6 Which trace gives information about frequent log space shortages? A. Audit trace class(8) B. Statistics trace class(3) C. Accounting trace class(10) D. Performance trace class(4) /Reference: : QUESTION 7 What should be implemented in order to audit all the activity of the install SYSADM? http://www.gratisexam.com/ A. DATA CAPTURE CHANGES should be set on all tables. B. A DB2 audit policy should be established, identifying the SYSADM ID to be audited. C. The DB2 authorization exit should be modified to convert the install SYSADM ID to another ID.
D. Nothing can be done, the install SYSADM has the highest authority and is not controlled or monitored. /Reference: : QUESTION 8 On what type of index would an ALTER INDEX ADD COLUMN be allowed? A. An XML index. B. An auxiliary index. C. A user defined catalog index. D. An index defined with BUSINESS_TIME WITHOUT OVERLAPS. /Reference: : QUESTION 9 The following DDL statements are executed to create the following objects: CREATE TABLESPACE TS1 BUFFERPOOL BP0 IN DB1; CREATE TABLE USER1.TB1 ( COL1 INTEGER, COL2 VARCHAR(10) ) IN DB1.TS1; CREATE INDEX USER1.IX1 ON USER1.TB1 ( COL2 ) BUFFERPOOL BP0 COPY YES; Next, the following ALTER statements are done (in order): 1) ALTER TABLESPACE DB1.TS1 BUFFERPOOL BP8K0 MAXPARTITIONS 20; 2) ALTER TABLESPACE DB1.TS1 SEGSIZE 64; 3) ALTER INDEX USER1.IX1 BUFFERPOOL BP16K0; Which of the following will materialize all of the changes with the least amount of work? A. Nothing needs to be done. B. REORG INDEX USER1.IX1 SHRLEVEL CHANGE C. REORG TABLESPACE DB1.TS1 SHRLEVEL REFERENCE D. REORG TABLESPACE DB1.TS1 SHRLEVEL REFERENCEREORG INDEX USER1.IX1 SHRLEVEL CHANGE /Reference: : QUESTION 10 You have to design a numeric column, which is also the primary key. The column should cover large (i.e., 123456789012345678) numbers. Which column data definition covers the requirements? A. BIGINT B. INTEGER C. DECFLOAT (34) D. DECIMAL (31,18) Correct Answer: A
/Reference: : QUESTION 11 How can you find out which external and native stored procedures are active in the system? A. Use the -DIS PROCEDURE(*.*) command. B. Use the -DIS THREAD(*) TYPE(PROC) command. C. There is no WLM or DB2 command to obtain this information. D. You can only obtain this information indirectly if you know the WLM application environment by issuing the D WLM,APPLENV=xxxx command. /Reference: : QUESTION 12 For monitoring space growth over time, which statistics should NOT be considered? A. SYSIBM.SYSTABLEPART_HISTCARDF, SPACEFSYSIBM.SYSINDEXPART_HISTCARDF, SPACEF B. SYSIBM.SYSTABLEPARTCARDF, SPACEFSYSIBM.SYSINDEXPARTCARDF, SPACEF C. SYSIBM.SYSTABLESPACEDSSIZE, AVGROWLENSYSIBM.SYSINDEXESPIECESIZE, AVGKEYLEN D. SYSIBM.SYSTABLESPACESTATSSPACESYSIBM.SYSINDEXSPACESTATSSPACE /Reference: : QUESTION 13 When is a merge scan join a well performing access path? A. When the number of qualifying rows of the inner and outer table are both large. B. When the query references at least two dimensions and the STARJOIN subsystem parameter is 1. C. When the number of rows in the outer table is small and the number of pages accessed in the inner table is small. D. When the matching columns of the inner table are in a non-clustering index or the outer table has duplicate qualifying rows. Correct Answer: A /Reference: : QUESTION 14 When determining what page size will be best for index compression, which utility can be used to provide
information on space saved and potential buffer space wasted for each of the different page sizes? A. DIAGNOSE B. DSN1COMP C. DSN1PRNT D. DSN1LOGP /Reference: : QUESTION 15 The new billing application is seeing Class 2 Elapsed Time being made up of mainly Class 3 Synchronous database I/O time. All of the DB2 objects for the new billing application are in BP5. What command can be used to research the details behind the database I/O time associated with the new billing application? A. DISPLAY DDF DETAIL B. START TRACE(AUDIT) C. DISPLAY BUFFERPOOL(*) D. DISPLAY BUFFERPOOL(BP5) LSTATS(ACTIVE) DETAIL /Reference: : QUESTION 16 How do you enable parallelism in a dynamic SQL statement? A. BIND with DEGREE(1) B. BIND with DEGREE(ANY) C. Use SET CURRENT DEGREE = ANY D. Use SET CURRENT DEGREE = '1' /Reference: : QUESTION 17 The access path chosen for a query shows a table space scan, when it appears that there is an index available that would provide a more efficient access path. What situation could have caused a table space scan to be chosen instead of the index? A. Index is created with PCTFREE of zero. B. The number of columns in the index is less than four. C. RUNSTATS were run when there were no rows in the table. D. RUNSTATS were run when there was a million rows in the table.
/Reference: : QUESTION 18 You have been asked to find packages that use isolation level UR in dynamic SQL. Which trace will be utilized? A. Audit trace class(4) B. Monitor trace class(6) C. Performance trace class(3) D. Accounting trace class(1,2,3,7,8) /Reference: : QUESTION 19 Which of the following techniques CANNOT be used to implement DB2 based row level authorization in a readonly environment for a specific table? A. Using a view. B. Using a VALIDPROC. C. Using multi-level security. D. Using masks and permissions. /Reference: : QUESTION 20 If security administration is separated from system and database administration, via zparm, which level of authority is required to define roles or trusted contexts? A. SYSADM B. DBADM C. SECADM D. INSTALL SYSOPR /Reference: : QUESTION 21
In order to communicate a DISPLAY DATABASE (DB1) SPACENAM (TS1) command execution from one DB2 member to another, which coupling facility structure is used? A. GBP32 B. SCA C. LOCK D. GBP0 /Reference: : QUESTION 22 Given the following CREATE TABLE statement: CREATE TABLE TB1 (C1 CHAR(4), C2 XML, C3 CLOB(1K)) ; How many VSAM clusters will DB2 create? A. 1 B. 4 C. 5 D. 6 /Reference: : QUESTION 23 Compression is desired for index IX1. The current definition of IX1 is as follows: CREATE INDEX IX1 ON TAB1 (COL1 ASC) USING STOGROUP STG1 BUFFERPOOL BP1 ; Which of the following activities must be performed first in order to compress the existing index IX1? A. Copy the index. B. REBUILD the index. C. Compress the tablespace. D. ALTER the index to use a page size larger than 4K. /Reference: : QUESTION 24 A table is created using the ORGANIZED BY HASH UNIQUE syntax, what action should occur? A. Specify the column names to be hashed. B. Create a unique index on the hash columns. C. Create a clustering index on the hash columns. D. Create a unique clustering index on the hash columns.
Correct Answer: A /Reference: : QUESTION 25 Why does the following DDL command fail? CREATE INDEX X1 ON T1 (COL1, COL2, COL3, BUSINESS_TIME WITHOUT_OVERLAPS); A. The index must be partitioned. B. The index must use page size > 4K. C. The index must be defined as UNIQUE. D. The index must be defined as CLUSTER. /Reference: : QUESTION 26 Which of the following tasks cannot be done via a single ALTER TABLE statement? A. Add a new partition to the table space. B. Change the VALIDPROC attribute of the table. C. Change a table check constraint on the table. D. Change the DATA CAPTURE attribute of the table. /Reference: : QUESTION 27 Altering the DSSIZE is allowed for what type of table space? A. XML table space. B. Universal table space. C. Segmented table space. D. DSSIZE cannot be altered. /Reference: : QUESTION 28 When these two commands are issued in sequence, one after the other: STOP FUNCTION SPECIFIC(A.B)
ACTION(REJECT) STOP FUNCTION SPECIFIC(A.B) ACTION(QUEUE) What will occur? A. Function A.B is stopped and queues all access. B. Function A.B is stopped and rejects all access. C. Function A.B is stopped and rejects all access until we start the function or run out of installation timeout. D. Function A.B is stopped and queues all access until we start the function or run out of installation timeout. /Reference: : QUESTION 29 What is one of the first key steps in preparing to use the BACKUP SYSTEM utility? A. Run the MODIFY RECOVERY utility. B. Alter the BSDS to allow BACKUP SYSTEM. C. Define one or more storage groups to a COPYPOOL. D. Stop DB2 to enable DFSMShsm functionality to be used. /Reference: : QUESTION 30 The application will be handling a large volume of input data that will need to be added to or update 4 different tables. On average, there will be 50 million input records daily. To ensure that the application process to SQL INSERT and SQL UPDATE(or SQL MERGE) delivers a high level of availability to the tables involved in this application process, what is a key component of the application coding? A. Issue a LOCK TABLE for all 4 tables. B. Execute the SQL INSERT before the SQL UPDATE. C. Provide an effective commit / restart process. D. Run a QUIESCE utility before the process starts. /Reference: : QUESTION 31 Which option allows the UNLOAD utility to unload LOBs into output files together with non-lob data? A. DELIMITED B. SPANNED YES C. DSNTYPE HFS on the TEMPLATE D. DSNTYPE LIBRARY or PDS on the TEMPLATE
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