A Examcollection.Premium.Exam.54q

Transcription

1 A Examcollection.Premium.Exam.54q Number: A Passing Score: 800 Time Limit: 120 min File Version: Exam Code: A Exam Name: Assessment: DB2 9.7 Advanced DBA for LUW - Assessment

2 Actualanswers QUESTION 1 An employee is not able to connect to the PRODDB database using the correct user ID and password. The TCP/IP protocol is running normally; other remote clients are also having problems connecting to this database. Which two could be the cause of the problem? (Choose two.) A. The DB2COMM environment variable at the server is not set to TCPIP. B. The DB2 Administration Server is not started. C. The port number is not assigned in the server's services file. D. The client's authentication type is not compatible with the server. E. The server node and/or database are not cataloged correctly on the client. Correct Answer: AE QUESTION 2 While attempting to establish connectivity between a Windows client and a UNIX server, the following commands were issued from the Windows client: CATALOG TCPIP NODE node001 REMOTE hostnm01 SERVER 50000; CATALOG DATABASE samp001 AS samp001 AT NODE node001; TERMINATE; When trying to connect to the SAMP001 database the following error was received: SQL30061N The database alias or database name name was not found at the remote node. The database name is not an existing database at the remote database node. The statement cannot be processed. What should be done resolve the problem? A. Add a Database Connection Services entry to the /etc/services file on the Windows client. B. Change the service name (SVCENAME) in the remote servers database configuration. C. Match the port number in the CATALOG TCPIP NODE command with the port number in the /etc/services file on the remote server. D. Add an entry into the Database Connection Services directory on the Windows client. QUESTION 3 A DBA has established connectivity to a DB2 for z/os database and is exploiting a System z sysplex for load balancing and fault-tolerance. Which series of statements and commands can be issued to ensure that agents remain allocated to help maintain the sysplex server list? A. UPDATE DBM CFG USING NUM_INITAGENTS 200;db2stop;db2start; B. UPDATE DBM CFG USING NUM_INITAGENTS 0;db2stop;db2start; C. UPDATE DBM CFG USING NUM_POOLAGENTS 200;db2stop;db2start; D. UPDATE DBM CFG USING NUM_POOLAGENTS 0;db2stop;db2start;

3 QUESTION 4 Setting the DB2_FMP_COMM_HEAPSZ=0 will result in which the following? A. User-defined function calls will be disabled. B. In a partitioned environment, infinite communications will be enabled between partitions. C. In a partitioned environment, communications will not be buffered. D. Non-fenced routines can be invoked, however automatic database maintenance will be disabled. QUESTION 5 What determines the degree of inter-partition parallelism used? A. The number of database partitions and the definition of partition groups. B. The number of database connections and the definition of partitions groups. C. The value of the INTER_PARALLEL Database Manager configuration parameter. D. The value of the DFT_DEGREE database configuration parameter. Correct Answer: A QUESTION 6 A journaling application inserts data with continually increasing sequential keys while a clean up process randomly deletes erroneous rows. What can be done to maximize insert performance? A. Issue a db2set DB2MAXFSCRSEARCH=1024 command. B. Issue an ALTER TABLESPACE EXTEND statement. C. Issue a db2set DB2SKIPDELETED=ON command. D. Issue an ALTER TABLE APPEND ON statement.

4 QUESTION 7 Which command will prevent prefetching during crash recovery? A. db2set DB2_AVOID_PREFETCH=OFF B. db2set DB2_AVOID_PREFETCH=ON C. db2set DB2_RECOVERY_PREFETCHING=NO D. db2set DB2_RECOVERY_PREFETCHING=YES QUESTION 8 Which two operators would indicate inter-partition parallelism in an Optimizer Plan? (Choose two.) A. LTQ B. HSJOIN C. BTQ D. IP E. DTQ E QUESTION 9 A table named TAB_A was created with the COMPRESS YES option specified and populated with 100,000 rows. If a DBA wants to create an index on table TAB_A, which statement is true? A. In order for the index to be compressed, it must be enabled for compression by specifying the COMPRESS YES option with the CREATE INDEX statement that is used to create it. B. The index will automatically be compressed since the table it is associated with is compressed; the ALTER INDEX command does not have to be executed. C. In order for the index to be compressed, it must be enabled for compression by specifying the COMPRESS YES option in the CREATE INDEX statement used to create it; however, the index will not be compressed until the ALTER INDEX command is used to create an index compression dictionary. D. The index will automatically be enabled for compression because the associated table is compressed; however, the index will not be compressed until it is REORGed.

5 QUESTION 10 Given a SHEAPTHRES value of 2560, in which two cases will a SHEAPTHRES_SHR value of 1024 be meaningful? (Choose two.) A. INTRA_PARALLEL NO B. MAX_CONNECTIONS 2000, MAX_COORDAGENTS 100 C. MAX_AGENTS 100, MAX_CONNECTIONS 2000 D. MAX_CONNECTIONS 500, MAX_COORDAGENTS 1000 E. INTRA_PARALLEL YES E QUESTION 11 If you know that the table space containers for your database reside on RAID-5 3+p arrays, which registry variable should be assigned the value *:3 to help improve performance? A. DB2_APM_PERFORMANCE B. DB2_EXTENDED_IO_FEATURES C. DB2_RESOURCE_POLICY D. DB2_PARALLEL_IO QUESTION 12 Which statement is true about clustering indexes in a partitioned database? A. The partitioning key column(s) should be added to the clustering index with the INCLUDE option. B. The clustering index column(s) should be suffixed by the partitioning key column(s). C. The clustering index column(s) should be prefixed by the partitioning key column(s). D. The partitioning key column(s) should be added immediately after the column in the clustering index with the highest cardinality. QUESTION 13 Which conditions must be met to implement HADR? A. Operating systems on primary and standby servers must be the same; DB2 versions need not be the same; and the databases must have the same bit-size (32 or 64 bit). B. Operating systems on primary and standby servers need not be the same; DB2 versions must be the same;

6 and the databases need not have the same bit-size (32 or 64 bit). C. Operating systems on primary and standby servers must be the same; DB2 versions must be the same; and the databases need not have the same bit-size (32 or 64 bit). D. Operating systems on primary and standby servers must be the same; DB2 versions must be the same; and the databases must have the same bit-size (32 or 64 bit). QUESTION 14 Which command will back up a database named SAMPLE to a TSM server using two concurrent TSM client sessions? A. BACKUP DATABASE sample USE TSM OPEN 2 SESSIONS WITH 4 BUFFERS B. BACKUP DATABASE sample USE TSM OPEN 4 SESSIONS WITH 2 BUFFERS C. BACKUP DATABASE sample USE TSM OPEN 2 SERVERS WITH 4 BUFFERS D. BACKUP DATABASE sample USE TSM OPEN 4 SERVERS WITH 2 BUFFERS Correct Answer: A QUESTION 15 What is the proper set of steps to execute a redirected restore and change the container paths for a database not using automatic storage? A. Issue a RESTORE DATABASE command with the REDIRECT option;issue a SET TABLESPACE CONTAINERS command;issue a RESTORE DATABASE command with the CONTINUE option; B. Issue a RESTORE DATABASE command with the REDIRECT option;issue a RESTORE DATABASE command with the CONTINUE option; C. Issue a RESTORE DATABASE command with the ROLLFORWARD option;issue a RESTORE DATABASE command with the CONTINUE option; D. Issue a RESTORE DATABASE command with the ROLLFORWARD option;issue a SET TABLESPACE CONTAINERS command;issue a RESTORE DATABASE command with the CONTINUE option; Correct Answer: A QUESTION 16 Given the following output from the GET DATABASE CONFIGURATION command:

7 Which of the following DB configurations listed below will enable circular logging? A. LOGRETAIN=CIRCULAR B. LOGSECOND=-1 C. LOGARCHMETH1=OFF and LOGARCHMETH2=OFF D. LOGPRIMARY=LOGCIRCULAR and LOGRETAIN=OFF QUESTION 17 What are two authorities and/or privileges required for replaying SQL audit logs? (Choose two.) A. SECADM authority B. EXECUTE privilege on audit routines with DATA C. DBADM authority D. EXECUTE privilege on audit routines with NO DATA E. SYSADM authority Correct Answer: AB QUESTION 18 At which two levels can events be audited? (Choose two.) A. Instance level B. Database level C. Server level D. Operating System level E. Node level Correct Answer: AB

8 QUESTION 19 What will the db2audit facility do when a DB2 database instance is stopped? A. Stop automatically. B. Generate an error stating that the audit facility should be stopped prior to stopping the instance. C. Remain active. D. Write an error message to the audit log and stop automatically. QUESTION 20 If instance DB2INST1 is created and its authentication type is set to KRB_SERVER_ENCRYPT, which statement is true? A. Databases created in DB2INST1 will use SERVER_ENCRYPT authentication if KERBEROS authentication is not available. B. Databases created in DB2INST1 will use KERBEROS authentication if SERVER_ENCRYPT authentication is not available. C. Client connections to databases on DB2INST1 will fail unless they are attempted through an LDAP connection. D. Client connections from Windows machines to databases on DB2INST1 will flow clear text passwords. Correct Answer: A QUESTION 21 What is a method for enabling non-buffered I/O at the table space level in a DB2 database? A. Set the DB2_DIRECT_IO configuration parameter to YES. B. Set the DB2_FILESYSTEM_CACHE configuration parameter to YES. C. Use the USE DIRECT IO clause with the CREATE TABLESPACE or ALTER TABLESPACE command. D. Use the NO FILE SYSTEM CACHING clause with the CREATE TABLESPACE or ALTER TABLESPACE command. QUESTION 22 A database and a table space were created using the following commands:

9 Afterwards, two tables were created in table space TBSP1 and both tables were populated with 100,000 rows. If a DBA decides that database MYDB should use automatic storage, which command(s) are needed to convert both the database and table space TBSP1? A. ALTER DATABASE mydb ADD STORAGE ON?mnt/path_1??mnt/path_2? B. ALTER DATABASE mydb ADD STORAGE ON?mnt/path_1??mnt/path_2?ALTER TABLESPACE tbsp1 MANAGED BY AUTOMATIC STORAGE; C. ALTER DATABASE mydb AUTOMATIC STORAGE YES ON?mnt/path_1??mnt/path_2? D. ALTER DATABASE mydb AUTOMATIC STORAGE YES ON?mnt/path_1??mnt/path_2? ALTER TABLESPACE tbsp1 MANAGED BY AUTOMATIC STORAGE; QUESTION 23 What are the steps required to remove July 2005 data from a partitioned table and replace with it with July 2010 data? A. 1) Detach partition containing July 2005 data2) Load July 2010 data into a new table3) Attach the new table as a new partition in the existing partitioned table4) Check constraint integrity for the partitioned table B. 1) Detach partition containing July 2005 data2) Load July 2010 data into a new table3) Attach the new table as a new partition in the existing partitioned table4) Rebind the partitioned table C. 1) Detach partition containing July 2005 data2) Load July 2010 data into a new table3) Attach the new table as a new partition in the existing partitioned table4) Update statistics on the partitioned table D. 1) Detach partition containing July 2005 data2) Load July 2010 data into a new table3) Attach the new table as a new partition in the existing partitioned table4) Reorg the partitioned table Correct Answer: A QUESTION 24 The DBA needs to create a table with key columns YEARMONTH and YEAR. This table needs to be partitioned by column YEARMONTH with three months per data partition. Additionally, data needs to be organized by column YEAR, so that all rows within any three month date range are clustered together based on 12 months of data. Which CREATE TABLE statement will accomplish this objective? A. CREATE TABLE tab1(yearmonth INT,year CHAR(2))PARTITION BY RANGE (year) (STARTING ENDING EVERY 12)ORGANIZE BY DIMENSIONS (yearmonth)) B. CREATE TABLE tab1(yearmonth INT,year CHAR(2))PARTITION BY RANGE (year) (STARTING

10 ENDING EVERY 3)ORGANIZE BY DIMENSIONS (yearmonth)) C. CREATE TABLE tab1(yearmonth INT,year CHAR(2))PARTITION BY RANGE (yearmonth) (STARTING ENDING EVERY 12)ORGANIZE BY DIMENSIONS (year)) D. CREATE TABLE tab1(yearmonth INT,year CHAR(2))PARTITION BY RANGE (yearmonth) (STARTING ENDING EVERY 3)ORGANIZE BY DIMENSIONS (year)) QUESTION 25 A DBA would like to examine repartitioning options for a partitioned database named PRODDB. Which tool can be used to provide recommendations on re-partitioning? A. Configuration Advisor B. Partition Assistant C. Design Advisor D. Workload Manager QUESTION 26 How can a DBA validate that an existing backup was compressed? A. Check the output from the command LIST HISTORY BACKUP ALL FOR the database. B. Check the value of the COMPRESS_BACKUP database configuration setting. C. Check the value of the DB2_COMPRESS_BACKUP registry variable. D. Check the header information of the backup file using db2ckbkp. QUESTION 27 If LOGSECOND=-1 then which of the following statements is true? A. You still use LOGPRIMARY and LOGFILSIZ configuration parameters to specify how many log files the database manager should keep in the active log path. B. You must configure the OVERFLOWLOGPATH configuration parameter if your active log path is not on a raw device. C. The database will reserve active log space for transactions that may need to roll back and write log records. D. An infinite number of overflow log files will be used with archival logging.

11 Correct Answer: A QUESTION 28 In order for HADR to start, which statement is true when setting the HADR_TIMEOUT database configuration value? A. The HADR_TIMEOUT value must be identical on both the primary and the standby server. B. Changes to the HADR_TIMEOUT value will take effect immediately. C. If the HADR_TIMEOUT value is set to -1, connection timeouts will not occur. D. If the HADR_TIMEOUT value is different between the two servers, the lowest value is used. Correct Answer: A QUESTION 29 Which command CANNOT be used to create the compression dictionary for a table? A. IMPORT B. INSPECT C. LOAD D. RUNSTATS QUESTION 30 Given an HADR pair configured with HADR_PEER_WINDOW set to 300 seconds. If the standby server looses communication with the primary at 11:02:03 am, when can the following command be run so that the standby server will successfully be promoted to be a primary server? TAKEOVER HADR ON DB mydb BY FORCE PEER WINDOW ONLY A. Any time after 11:02:03 am B. Any time before 11:07:03 am C. Any time after 11:07:04 am D. Any time after 11:07:03 am

12 QUESTION 31 Which command would be used to obtain the name of the first active log file for a database with log retain enabled? A. GET CURRENT ACTIVE LOGFILE B. LIST LOGFILES C. GET DATABASE CONFIGURATION D. LIST INDOUBT TRANSACTIONS QUESTION 32 Given INTRA_PARALLEL is OFF, average row length is 900 bytes, and temporary table cardinality is 1000, which setting would prevent a SORTHEAP overflow when the temporary table is sorted? A. SORTHEAPTHRES 10000K, SORTHEAP 250K B. SORTHEAPTHRES 10000K C. SORTHEAP AUTOMATIC, SHEAPTHRES 10000K D. SORTHEAP AUTOMATIC, SHEAPTHRES 0 QUESTION 33 Which action(s) will cause a compression dictionary to be removed from a table? A. Set the table COMPRESS attribute to NO. B. Set the table COMPRESS attribute to NO;run REORG against the table. C. Set the table COMPRESS attribute to NO;run INSPECTESETDICTIONARY against the table. D. Set the table COMPRESS attribute to NO;run RUNSTATS against the table. QUESTION 34 Which statement is correct about statistical views? A. A statistical view is created by executing runstats on a regular view. B. A statistical view holds information about the system catalog statistical tables. C. A statistical view provides the optimizer with additional correlation statistics. D. A statistical view provides the optimizer with more accurate cardinality estimates.

13 QUESTION 35 A table named TAB_A was created with the COMPRESS YES option specified and populated with 100,000 rows. If a DBA wants to create an index on table TAB_A, which statement is true? A. In order for the index to be compressed, it must be enabled for compression by specifying the COMPRESS YES option with the CREATE INDEX statement that is used to create it. B. The index will automatically be compressed since the table it is associated with is compressed; the ALTER INDEX command does not have to be executed. C. In order for the index to be compressed, it must be enabled for compression by specifying the COMPRESS YES option in the CREATE INDEX statement used to create it; however, the index will not be compressed until the ALTER INDEX command is used to create an index compression dictionary. D. The index will automatically be enabled for compression because the associated table is compressed; however, the index will not be compressed until it is REORGed. QUESTION 36 Which description is correct when discussing the DB2_MEM_TUNING_RANGE registry variable? A. It is recommended to set this variable only when the Self-Tuning Memory Manager (STMM) is disabled. B. It is recommended to set this variable only when using STMM, when DATABASE_MEMORY is set to AUTOMATIC, and if insufficient system memory problems are occurring. C. It is recommended that this variable be enabled at all times in order to prevent DB2 from taking too much physical memory. D. It is recommended that this variable be used to set the maximum percentage of memory that DB2 can use on the system. QUESTION 37 Given a database with Self-Tuning Memory Manager (STMM) enabled, what will DB2 do when a new buffer pool is created using the IMMEDIATE option? A. Attempt to create the buffer pool and immediately request additional memory from the operating system to allocate. If the operating system memory is not available, the buffer pool will not be created. B. Attempt to create the buffer pool and immediately allocate the memory requested, resizing the existing buffer pools and heaps as required. If there is insufficient memory in the global memory allocation for DB2, the buffer pool will not be created. C. Attempt to create the buffer pool and immediately allocate the memory requested from available database

14 shared memory. If the memory available is not sufficient, then allocation of the buffer pool will be deferred until the database is stopped and restarted. D. Attempt to create the buffer pool and immediately request additional instance level memory. If the instance level memory is not available, then creation of the buffer pool is deferred until the database is stopped and restarted. QUESTION 38 Which database configuration parameters can be used to limit the amount of memory allocated for the LOAD utility? A. UTIL_HEAP_SZ and STAT_HEAP_SZ B. LOAD_HEAP_SZ and DATABASE_MEMORY C. LOAD_HEAP_SZ and STAT_HEAP_SZ D. UTIL_HEAP_SZ and DATABASE_MEMORY QUESTION 39 Assuming table TAB_A resides in a DB2 9.7 database, what is one way to obtain an estimate of how much space could be saved if this table were compressed? A. The ADMINGETTABCOMPRESSINFO table function. B. The ADMINGETTABCOMPRESSINFO_V97 table function. C. The ADMIN_GET_TAB_COMPRESS_INFO_V97 table function. D. The ADMIN_GET_TAB_INFO table function. QUESTION 40 What is the minimum authority required to execute the RUNSTATS command against a table? A. SYSMON B. SQLADM C. DATAACCESS D. SECADM

15 QUESTION 41 What new security authorities have been introduced in DB2 V9.7? A. WLMADM, ACCESSCTRL, SECADMIN B. EXPLAIN, SECADMIN, DATAACCESS C. SECADMIN, ACCESSCTRL, SQLADM D. WLMADM, SQLADM, EXPLAIN QUESTION 42 What are two authorities and/or privileges required for replaying SQL audit logs? (Choose two.) A. SECADM authority B. EXECUTE privilege on audit routines with DATA C. DBADM authority D. EXECUTE privilege on audit routines with NO DATA E. SYSADM authority Correct Answer: AB QUESTION 43 At which two levels can events be audited? (Choose two.) A. Instance level B. Database level C. Server level D. Operating System level E. Node level Correct Answer: AB QUESTION 44 A database named MYDB is created in instance DB2INST1, which has been configured to use KRB_SERVER_ENCRYPT authentication. If a client attempting to access database MYDB does not support

16 Kerberos authentication, which authentication method will be used to establish a connection? A. SERVER_ENCRYPT B. SERVER C. KRB_SERVER_ENCRYPT D. CLIENT Correct Answer: A QUESTION 45 A DBA has configured an Oracle data source in a federated database (that references a table named ORA1). How do you update the statistics for table ORA1 at the federated server? A. Perform the equivalent of RUNSTATS on ORA1 in Oracle. B. Perform RUNSTATS on the ORA1 nickname at the federated server. C. Perform the equivalent of RUNSTATS on ORA1 in Oracle; then perform RUNSTATS on the ORA1 nickname. D. Perform the equivalent of RUNSTATS on ORA1 in Oracle; then drop and re-create the ORA1 nickname. QUESTION 46 If table space TBSP1 is using automatic storage, and the existing storage paths are full, which command would increase the available storage? A. ALTER DATABASE ADD STORAGE ON '/db2/filesystem1' B. ALTER TABLESPACE tbsp1 ADD ('/db2/filesystem1') C. ALTER DATABASE ADD STORAGE FOR tbsp1 ('/db2/filesystem1') D. ALTER TABLESPACE tbsp1 EXTEND USING ('/db2/filesystem1') Correct Answer: A QUESTION 47 A database named MYDB was created by executing the following command: CREATE DATABASE mydb AUTOMATIC STORAGE NO Later, a decision is made to modify this database so that both it and its table spaces use automatic storage. What steps are required to make this modification? A. Use the ALTER DATABASE command to convert the database; all existing table spaces will be converted automatically. B. Use the ALTER DATABASE command to convert the database; use the ALTER TABLESPACE command to convert all existing table spaces.

17 C. Use the ALTER DATABASE command to convert the database; use the ALTER TABLESPACE command to convert all existing SMS table spaces. D. Use the ALTER DATABASE command to convert the database; use the ALTER TABLESPACE command to convert all existing DMS table spaces. QUESTION 48 A database and a table space were created using the following commands: Afterwards, two tables were created in table space TBSP1 and both tables were populated with 100,000 rows. If a DBA decides that database MYDB should use automatic storage, which command(s) are needed to convert the database? A. ALTER DATABASE mydb ADD STORAGE ON?mnt/path_1??mnt/path_2? B. ALTER DATABASE mydb ADD STORAGE ON?mnt/path_1??mnt/path_2?ALTER TABLESPACE tbsp1 MANAGED BY AUTOMATIC STORAGE; C. ALTER DATABASE mydb AUTOMATIC STORAGE YES ON?mnt/path_1??mnt/path_2? D. ALTER DATABASE mydb AUTOMATIC STORAGE YES ON?mnt/path_1??mnt/path_2? ALTER TABLESPACE tbsp1 MANAGED BY AUTOMATIC STORAGE; Correct Answer: A QUESTION 49 Which data organization schemes are supported? A. PARTITION BY HASH and ORGANIZE BY B. PARTITION BY RANGE and ORGANIZE BY HASH C. PARTITION BY HASH and ORGANIZE BY RANGE D. PARTITION BY RANGE and ORGANIZE BY

18 QUESTION 50 How can you change an existing non-partitioned index for a partitioned table to a partitioned index? A. Use the ALTER INDEX command. B. Use the DROP INDEX and CREATE INDEX commands. C. Use the REORG INDEX command. D. Use the ALTER INDEX and REORG INDEX commands. QUESTION 51 A DBA would like to examine repartitioning options for a partitioned database named PRODDB. Which tool can be used to provide recommendations on re-partitioning? A. Configuration Advisor B. Partition Assistant C. Design Advisor D. Workload Manager QUESTION 52 The DBA needs to create a table with key columns YEARDAY, YEAR, and DAY. This table needs to be partitioned by column YEARDAY with three months per data partition. Additionally, data needs to be organized so that all rows within any three month date range are clustered together based on 12 months of data. Which CREATE TABLE statement will accomplish this objective? A. CREATE TABLE tab1(yearday INT,year CHAR(2),day INT))PARTITION BY RANGE (year) (STARTING ENDING EVERY 3)ORGANIZE BY DIMENSIONS (year, day)) B. CREATE TABLE tab1(yearday INT,year CHAR(2),day INT))PARTITION BY RANGE (yearday) (STARTING ENDING EVERY 3)ORGANIZE BY DIMENSIONS (year, day)) C. CREATE TABLE tab1(yearday INT,year CHAR(2),day INT))PARTITION BY RANGE (yearday) (STARTING ENDING EVERY 3)ORGANIZE BY DIMENSIONS (year)) D. CREATE TABLE tab1(yearday INT,year CHAR(2),day INT))PARTITION BY RANGE (yearday) (STARTING ENDING EVERY 3)ORGANIZE BY DIMENSIONS (day)) QUESTION 53 Given the following statement:

19 Which statement will successfully add a new partition to table T1 for April 2010? A. Export data from the main partitioned table; create a table with the same definition as the partitioned table; attach to the main partitioned table; import data into the main partitioned table; run the SET INTEGRITY statement. B. Create a table with the same definition as the partitioned table; attach to the main partitioned table; data will be automatically redistributed across all table partitions. C. Create a table with the same definition as the partitioned table; load the new table with data; attach the new table to the main partitioned table; run the SET INTEGRITY statement. D. Export data from the main partitioned table; drop the main partitioned table; create the main partitioned table with new partitioning range; import data into the main partitioned table. QUESTION 54 A Windows user with a local database is not able to connect to a zos database. The System Database Directory and the Node Directory have the correct entries. Other users can connect to the database from their workstations without problems. What should be done resolve the problem? A. Uncatalog and re-catalog the directory entries for the zos database and try again. B. Catalog the zos database in the Local Database Directory. C. Catalog the zos database in the Database Connection Services Directory. D. Catalog the zos database in the Distributed Data Facility Directory.