C1000-078 : IBM Db2 12 for z/OS Administrator Exam

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IBM
C1000-078
IBM Db2 12 for zOS Administrator
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Question: 1
When the Db2 subsystem is in an abnormal condition, which utility control statement can be used to start the subsystem in a restricted mode to perform recovery or maintenance tasks?
1. START DB2 ACCESS(MAINT)
ECOVER SYSUTIL ERM UTILITY
wer: A
anation: The START DB2 ACCESS(MAINT) command can be used he Db2 subsystem in a restricted mode, which allows only maintena ed activities to be performed. This can be useful in situations where th ystem is in an abnormal condition and needs to be brought back onlin ed capacity to perform recovery or other maintenance tasks.
stion: 2
ch utility control statement can be used to recover the SYSUTIL catal in the event of a failure or abnormal condition?
ISPLAY THREAD TART DB2
DISPLAY THREAD
2. R
3. T
Ans
Expl to
start t nce-
relat e
subs e in a
limit
Que
Whi og
table
1. D
2. S
3. RECOVER SYSUTIL
4. TERM UTILITY
Answer: C
Explanation: The RECOVER SYSUTIL command can be used to recover the SYSUTIL catalog table, which stores information about active utility jobs, in
the event of a failure or abnormal condition. This can be useful in restoring the SYSUTIL table to a known, consistent state.
Question: 3
What are the critical Db2 system parameters that should be carefully set and tuned?
uffer pool sizes og data set sizes
ocking and concurrency parameters ll other Options
wer: D
anation: The critical Db2 system parameters that should be carefully s uned include:
er pool sizes: Properly sizing the buffer pools can significantly impact ormance of Db2 applications.
ata set sizes: Ensuring that the log data sets are large enough to mmodate the workload can prevent performance issues and outages. ing and concurrency parameters: Tuning the locking and concurrency meters can help manage resource contention and improve the overall ormance of the Db2 system.
stion: 4
B
L
L
A
Ans
Expl et
and t
Buff the
perf Log d acco Lock para perf
Que
What is the purpose of a BUSINESS_TIME period in Db2?
1. To automatically generate unique values for a column, such as a surrogate key
2. To define a default value that will be assigned to a column if no value is provided
3. To define a condition or range of acceptable values for a column
4. To track the validity period of a row in a slowly changing dimension table Answer: D
yses. The BUSINESS_TIME period is defined using two columns that sent the start and end dates of the row's validity period, contributing t all data integrity by preserving the historical evolution of the data.
stion: 5
ch Db2 utility is used to apply log records to a table space during an mental recovery operation?
OPY ECOVER UIESCE ESTORE
wer: B
anation: The RECOVER utility in Db2 is responsible for applying the ssary log records to a table space during an incremental recovery
Explanation: A BUSINESS_TIME period in Db2 is used to track the validity period of a row in a slowly changing dimension table. This feature allows you to maintain a history of changes to the data, enabling temporal queries and anal
repre o the
over
Que
Whi incre
1. C
2. R
3. Q
4. R
Ans Expl
nece
operation, in order to bring the data to a consistent point in time.
Question: 6
What is the purpose of using the REBIND command in Db2?
1. To load data into a table
2. To recover data to a consistent point in time
3. To reorganize a table
4. To update the access paths for SQL statements Answer: D
as the addition or modification of indexes, which can affect the optim ss path chosen by the Db2 optimizer.
stion: 7
can you drop an existing trigger from a Db2 table? se the DROP TRIGGER command.
se the ALTER TABLE command with the DROP TRIGGER clause. se the MODIFY TABLE command with the DELETE TRIGGER cla riggers cannot be dropped from existing tables in Db2.
wer: A
anation: To drop an existing trigger from a Db2 table, you can use the OP TRIGGER command. This allows you to remove the trigger from t
without having to drop and recreate the entire table.
Explanation: The REBIND command in Db2 is used to update the access paths for SQL statements. This is necessary when changes are made to the database, such al
acce Que How
1. U
2. U
3. U use.
4. T
Ans Expl
DR he
table
Question: 8
Which Db2 utility is used to establish a point of consistency for a table space?
1. COPY
2. RECOVER
3. QUIESCE
Answer: C
Explanation: The QUIESCE utility in Db2 is used to establish a point of consistency for a table space, which can be used as a reference point for recovery operations.
stion: 9
ch Db2 privilege is required to create a stored procedure? YSADM
BADM REATEPROC RANT
wer: C
anation: The CREATEPROC privilege is required to create a stored edure in Db2. This privilege allows the user to create, alter, and drop s edures in the database.
stion: 10
ch of the following Db2 catalog tables can be used to identify objects
Que
Whi
1. S
2. D
3. C
4. G
Ans Expl
proc tored
proc
Que
Whi with
pending changes or recovery operations?
1. SYSIBM.SYSTABLESPACE
2. SYSIBM.SYSDATABASE
3. SYSIBM.SYSTABLES
4. SYSIBM.SYSCOPY
Explanation: The SYSIBM.SYSCOPY catalog table in Db2 for z/OS contains information about the backup and recovery status of Db2 objects, including table spaces, indexes, and databases. This information can be used to identify objects with pending changes or recovery operations, which can be important for maintaining the overall health and consistency of the Db2 environment.
stion: 11
is the purpose of using a trusted context in Db2? improve query performance
enforce data integrity rules
enable fine-grained access control automatically generate unique row IDs
wer: C
anation: The primary purpose of using a trusted context in Db2 is to e grained access control. A trusted context is a database object that defi onship between a system user ID and a Db2 authorization ID, allowin granular control over user privileges and access to the database.
stion: 12
Que
What
1. To
2. To
3. To
4. To
Ans
Expl nable
fine- nes a
relati g for
more
Que
Which utility control statement can be used to display information about any active database-related threads on the Db2 subsystem?
1. DISPLAY UTILITY
2. DISPLAY THREAD
3. RECOVER SYSUTIL
4. START DB2
Answer: B
Explanation: The DISPLAY THREAD command can be used to display information about any active database-related threads on the Db2 subsystem. This can be useful in diagnosing and troubleshooting abnormal conditions that may be related to specific database operations or threads.
stion: 13
ch Db2 utility can be used to update the statistics in the Db2 catalog ta HECK DATA
HECK INDEX UNSTATS ECOVER
wer: C
anation: The RUNSTATS utility in Db2 can be used to update the tics in the Db2 catalog tables. RUNSTATS collects and updates vario tics about the data in your Db2 objects, including tables, indexes, and es. These statistics are then stored in the Db2 catalog tables, where th e used by the Db2 optimizer to make more informed decisions about
execution plans. The other utilities mentioned (CHECK DATA, CH EX, RECOVER) do not directly update the statistics in the Db2 catalo
Que
Whi bles?
1. C
2. C
3. R
4. R
Ans Expl
statis us
statis table
spac ey
can b
query ECK
IND g.
Question: 14
What is the purpose of the UTILITY status on a Db2 object?
1. To indicate that a system process is in progress on the object
2. To indicate that a utility process is in progress on the object
3. To indicate that a user-initiated action is in progress on the object
4. To indicate that the object is in a restricted state Answer: B
plete.
stion: 15
is the purpose of the AUDITPOLICYID parameter in the Db2 syste meters?
specify the name of the audit policy to be used define the audit trail storage location
control the level of detail recorded in the audit trail
set the default audit policy for new databases or objects wer: A
anation: The AUDITPOLICYID parameter in the Db2 system parame ed to specify the name of the audit policy that should be used for the D
m. This parameter allows you to activate a specific audit policy and e he desired events and objects are being audited.
Explanation: The UTILITY status indicates that a Db2 object has been placed in a restricted state due to a utility process, such as a REORG or RECOVER operation. This status prevents access to the object until the utility process is com
Que
What m
para
1. To
2. To
3. To
4. To
Ans
Expl ters
is us b2
syste nsure
that t
Question: 16
Which Db2 encoding scheme is best suited for storing data that contains a mix of different language characters, such as English, Chinese, and Arabic?
BCDIC SCII
nicode (UTF-8) nicode (UTF-16)
wer: C
anation: The Unicode (UTF-8) encoding scheme is best suited for stor hat contains a mix of different language characters, such as English, ese, and Arabic. UTF-8 is a variable-length character encoding that c sent a wide range of characters from different scripts and languages, ng it the preferred choice for handling multilingual data in a Db2 data
stion: 17
ch of the following Db2 catalog tables is used to view the audit trace ds?
E
A
U
U
Ans
Expl ing
data t
Chin an
repre
maki base.
Que
Whi recor
1. SYSIBM.SYSCOLUMNS
2. SYSIBM.SYSDATABASE
3. SYSIBM.SYSAUDITPOLITICS
4. SYSIBM.SYSAUDITPOLICIES
Answer: D
Explanation: The SYSIBM.SYSAUDITPOLICIES catalog table stores information about the audit policies defined in the Db2 system, including the events and objects being audited. This table can be queried to view the audit trace records and analyze the audited activities.
Question: 18
YSADM BADM REATEUDF RANT
wer: C
anation: The CREATEUDF privilege is required to create a user-defi ion in Db2. This privilege allows the user to create, alter, and drop us ed functions in the database.
stion: 19
is the purpose of materialized views in the physical data model? improve data integrity
reduce data storage requirements
Which Db2 privilege is required to create a user-defined function?
1. S
2. D
3. C
4. G
Ans
Expl ned
funct er-
defin Que What
1. To
2. To
3. To improve query performance
4. To simplify data maintenance Answer: C
Explanation: The purpose of materialized views in the physical data model is to improve query performance. Materialized views are pre-computed results of
complex queries, which can be used to speed up the execution of those queries or similar ones, at the expense of some additional storage requirements.
Question: 20
Which SQL constructs are used to handle XML data in Db2 for z/OS?
MLTABLE, XMLNAMESPACES, XMLCAST MLQUERY, XMLPARSE, XMLAGG
ll other Options wer: D
anation: Db2 for z/OS provides several SQL constructs for handling X including:
LSERIALIZE, XMLVALIDATE, XMLEXISTS: These functions are nvert between XML and other data types, validate XML data, and che he existence of XML elements or attributes.
LTABLE, XMLNAMESPACES, XMLCAST: These constructs are us and manipulate XML data stored in Db2 tables.
LQUERY, XMLPARSE, XMLAGG: These functions allow you to ex ery expressions, parse XML data, and perform aggregations on XML
stion: 21
XMLSERIALIZE, XMLVALIDATE, XMLEXISTS
X
X
A
Ans
Expl ML
data,
XM used
to co ck
for t
XM ed to
query
XM ecute
XQu data.
Que
How can you enforce referential integrity between tables in Db2?
1. By defining a UNIQUE constraint on the parent table
2. By defining a CHECK constraint on the child table
3. By defining a FOREIGN KEY constraint on the child table
4. By defining a PRIMARY KEY constraint on the parent table
Answer: C
stion: 22
is the purpose of the INCREMENTAL option in the COPY utility w ing an incremental image copy?
create a full image copy of the table space
create an incremental image copy of the table space create a compressed image copy of the table space create a parallel copy of the table space
wer: B
anation: The INCREMENTAL option in the COPY utility instructs D create an incremental image copy of the table space, which captures only t
ges since the last full or incremental image copy.
Explanation: To enforce referential integrity between tables in Db2, you need to define a FOREIGN KEY constraint on the child table. This constraint specifies a column or a set of columns in the child table that references the PRIMARY KEY of the parent table. The FOREIGN KEY constraint ensures that the values in the child table's column(s) match the values in the parent table's PRIMARY KEY, maintaining the integrity of the relationship between the tables.
Que
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creat
1. To
2. To
3. To
4. To
Ans
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chan

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