Unique Top-selling C1000-078 Exams - New 2026 IBM Pratice Exam
IBM Certified Administrator Dumps C1000-078 Exam for Full Questions - Exam Study Guide
IBM C1000-078 certification exam covers a range of topics related to Db2 12 for z/OS administration. These include database design and implementation, performance tuning and monitoring, security and auditing, disaster recovery and high availability, and data sharing and replication. C1000-078 exam also covers the use of Db2 tools and utilities for managing and manipulating Db2 data, as well as the use of SQL and other programming languages for manipulating and querying Db2 databases.
NEW QUESTION # 25
Considering the following command:
-STOP DDF MODE(SUSPEND)
Which of the following, pertaining to DDF connections in a two-way data sharing environment, is TRUE?
- A. It stops the DDF on all the members of the data sharing group where DDF has already been started
- B. It terminates currently executing distributed threads on the current member of the data sharing group
- C. It suspends DDF threads by preventing the outbound DDF work
- D. It stops the DDF on the current member of the data sharing group if DDF has already been started
Answer: C
NEW QUESTION # 26
Which of the following is required to successfully issue the -ACTIVATE command in a data sharing environment?
- A. The member on which the command is issued must be started in maintenance mode
- B. All active members must be running DB2 12
- C. The command must be issued with installation SYSADM authority
- D. Only one member may be active when the command is issued
Answer: D
NEW QUESTION # 27
Which one of the following buffer pool thresholds determines the percentage of the buffer pool that might be occupied by sequentially accessed pages?
- A. VPSEQT
- B. DWQT
- C. VDWQT
- D. VPPSEQT
Answer: A
Explanation:
Sequential Steal Threshold (VPSEQT) ?The percentage of pages that can be used for prefetch.
Default is 70%. For pools with mostly sequential access, you can set this value as high as 100.
For pools with mostly random access, set this value very low. Review the prefetch failure statistics to determine if applications attempt to use sequential processing against the objects allocated in this pool.
NEW QUESTION # 28
Which of the following commands can be used to show the client correlation token in order to find details such as the ip-address. port-address and unique-id to identify the distributed transaction?
- A. -DISPLAY FUNCTION SPECIFIC
- B. -DISPLAY THREADH DETAIL
- C. -DISPLAY DDF DETAIL
- D. -DISPLAY LOCATION OB.
Answer: B
NEW QUESTION # 29
To initiate a system checkpoint without modifying the current LOGLOAD value, which of the following should be issued?
- A. -SETLOGLOGLOAD(O)
- B. -SET LOG BOTH
- C. -SET LOG RESUME
- D. -SET LOG BOTH CHKTIME(10) LOGLOAD(500000)
Answer: A
NEW QUESTION # 30
Which technique is best suited to determine whether a bigger VPSIZE for a buffer pool could be beneficial?
- A. Analyze accounting trace records
- B. Analyze buffer pool simulation results
- C. Analyze performance trace records
- D. Analyze the contents of table SYSIBM.SYSTABLESPACESTATS
Answer: A
NEW QUESTION # 31
Which DB2 command is used to force a physical open of a table space, index space, or partition, or remove the GBP-dependent status for a table space, index space, or partition?
- A. -START DATABASE
- B. -DISPLAY DATABASE
- C. -STOP DATABASE
- D. -ACCESS DATABASE
Answer: D
Explanation:
The Db2 command ACCESS DATABASE forces a physical open of a table space, index space, or partition, or removes the GBP-dependent status for a table space, index space, or partition, or externalizes the real-time statistics and optimizer statistics recommendations from in-memory blocks to the appropriate catalog tables. The MODE keyword specifies the desired action.
NEW QUESTION # 32
Considering the following command:
-CANCEL THREAD {*) FORCE
In which of the following situations can it be used?
- A. If the CANCEL THREAD command without the FORCE option does not terminate the thread
- B. On local threads that are not in DB2
- C. On application threads that update NOT LOGGED table spaces
- D. If you are terminating a distributed thread that is part of a global transaction
Answer: A
NEW QUESTION # 33
DB2 just abended unexpectedly and needs to be restarted as quickly and consistently as possible.
Which of the following restart method do you pick?
- A. Perform a cold start
- B. Issue the-START DB2 command
- C. Create a conditional restart record using option STARTRBA and then restart DB2.
- D. Create a conditional restart record using option ENDRBA and then restart DB2
Answer: D
NEW QUESTION # 34
Which of the following subsystem parameters is only applicable in a data sharing environment?
- A. REFSHAGE
- B. RETLWAIT
- C. TWOACTV
- D. DSMAX
Answer: B
Explanation:
This value is only significant in a data sharing environment. It indicates how long a transaction should wait for a lock on a resource if another DB2 in the data sharing group has failed and is holding an incompatible lock on that resource. Locks held by failed DB2 members are called retained locks. This value is a multiplier that is applied to the connection's normal timeout value.
For example, if the retained lock multiplier is 2, then the timeout period for a call attachment connection that is waiting for a retained lock is twice the normal CAF timeout period. The default is 0, meaning applications do not wait for incompatible retained locks, the lock request is immediately rejected and the application receives a "resource unavailable" SQLCODE.
Install parameter RETAINED LOCK TIMEOUT on panel DSNTIPI, or ZPARM RETLWAIT in DSN6SPRM. This value is only significant in a data sharing environment. It indicates how long a transaction should wait for a lock on a resource if another DB2 in the data sharing group has failed and is holding an incompatible lock on that resource. Locks held by failed DB2 members are called retained locks. This value is a multiplier that is applied to the connection's normal timeout value. For example, if the retained lock multiplier is 2, then the timeout period for a call attachment connection that is waiting for a retained lock is twice the normal CAF timeout period.
The default is 0, meaning applications do not wait for incompatible retained locks, the lock request is immediately rejected and the application receives a "resource unavailable" SQLCODE.
NEW QUESTION # 35
Which subsystem parameter sets the maximum number of concurrent inbound DDF connections that are to be allowed?
- A. CTHREAD
- B. MAXDBAT
- C. MAXKEEPD
- D. CONDBAT
Answer: C
NEW QUESTION # 36
Which of the following is TRUE about the SYSCTRL authority?
- A. It is designed to be an administrator in a system with sensitive data
- B. It is designed to allow access to all data directly in DB2
- C. It is designed so group privileges cannot be granted to SYSCTRL
- D. It is designed not to be a part of the administrative authorizations
Answer: A
Explanation:
The SYSCTRL authority is designed for administering a system that contains sensitive data. With the SYSCTRL authority, you have nearly complete control of the DB2?subsystem. However, you cannot access user data directly unless you are explicitly granted the privileges to do so.
NEW QUESTION # 37
One DB2 catalog page set is corrupt and needs to be recovered to current. Which of the following is TRUE?
- A. Only the corrupt page set needs to be recovered
- B. The corrupt page set, and all of the page sets that are required prior to this, must be recovered in a certain order
- C. The catalog and directory always needs to be recovered as a whole in a certain order
- D. The catalog always needs to be recovered as a whole in a certain order
Answer: D
NEW QUESTION # 38
Which of the following can be accomplished by altering a table to use column access control?
- A. Pre-materialize a view with the changed values provided by the column mask
- B. Modify the values returned for table columns based on column masking definitions
- C. Restrict the access to specific rows for all or some users
- D. Hide column definitions from the DB2 catalog table SYSIBM.SYSCOLUMNS
Answer: B
NEW QUESTION # 39
Az/OS system has some storage constraints. The results of-DIS
STATS(INDEXMEMORYUSAGE) shows that a huge amount of storage is used for the fast index traversal processes. What can be done to avoid this storage usage?
- A. Reorganize the listed indexes
- B. Set subsystem parameter INDEX_MEMORY_CONTROL to DISABLE
- C. Issue SQL statement ALTER INDEX ixname REGENERATE USING APPLICATION COMPATIBILITY V12R1M500 for the listed indexes
- D. Set subsystem parameter INDEX_CLEANUP_THREADS to 0
Answer: D
NEW QUESTION # 40
Which of the following catalog or directory table spaces maintain their recovery information in the DB2 log?
- A. DSNDB01.SYSSPT01
- B. DSNDB01.SYSUTILX
- C. DSNDB06.SYSDDF
- D. DSNDB01.SYSLGRNX
Answer: B
NEW QUESTION # 41
Which of the following migration steps is optional?
- A. Tailor the DB2 catalog
- B. Define DB2 12 to z/OS
- C. Define DB2 initialization parameters: DSNTIJUZ
- D. Verify the integrity of the DB2 catalog and directory
Answer: D
NEW QUESTION # 42
Which one of the following modules, or its equivalent name, is optional for a successful DB2 start?
- A. The user version of the access control authorization exit routine (DSNX@XAC)
- B. The application default load module (DSNHDECP)
- C. The default load module (DSNZPARM)
- D. The DB2 connection authorization exit routine (DSN3@ATH)
Answer: C
NEW QUESTION # 43
Which authority prevents unintended access to user data but allows installation or migration of a DB2 subsystem?
- A. SYSADM
- B. Installation SYSOPR
- C. Installation SYSADM
- D. SYSCTRL
Answer: B
Explanation:
You are not required to use the SYSADM or installation SYSADM authority to install or migrate a Db2 subsystem. Instead, you can use the installation SYSOPR authority to perform all installation or migration tasks while preventing unintended access to user data.
NEW QUESTION # 44
When must the IRLM address space be active?
- A. During start of DB2
- B. At the first concurrent lock situation
- C. At the first lock request
- D. After startup of DB2
Answer: B
NEW QUESTION # 45
For best DB2 lock avoidance, which of the following BIND/REBIND options should be included in the REBIND command execution?
- A. ACQUIRE(USE)ISOLATION(CS)
- B. ACQUIRE(USE)ISOLATION(RR)
- C. CURRENTDATA(NO)ISOLATION(CS)
- D. CURRENTDATA(YES) ISOLATION(CS)
Answer: C
NEW QUESTION # 46
To simulate a new buffer pool size, what buffer pool parameter is used?
- A. SPSI2E
- B. AUTOSI2E
- C. PGFIX
- D. VPSIZE
Answer: A
NEW QUESTION # 47
Which service class does not have a goal, but runs with a fixed dispatching priority above all of the other work on the system?
- A. ONLINE
- B. SYSSTC
- C. SYSTEM
- D. SYSOTHER
Answer: B
NEW QUESTION # 48
What are the appropriate actions that can be taken to reduce false contention in a data sharing environment? (Choose two)
- A. Increase the proportional size of the lock table
- B. Increase workload with inter-DB2 read/write interest
- C. Increase the size of the lock structure
- D. Reduce the IRLMRWT subsystem parameter value
- E. Use LOCKSIZE PAGE and MAXROWS 1
Answer: C,D
NEW QUESTION # 49
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