Oracle 1Z0-948 Certification Sample Questions and Answers

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Oracle 1Z0-948 Sample Questions:

01. During a design discussion an engineer states that Coordinated Replicat achieves its throughput by having the Oracle database apply the transactions on its behalf.
Which correction should be made?
a) Neither type applies transactions, because the Receiver Service writes the changes into the target tables
b) Delegating the apply to the database describes Classic Replicat; a Coordinated Replicat reads the trail on the source side
c) Both types delegate the apply to the database, so the only difference between them is the trail each one reads
d) Delegating the apply to the database describes Integrated Replicat; a Coordinated Replicat applies the work itself
 
02. What specifically fails on the target when supplemental logging has not been enabled for a captured table?
a) The trail cannot be written, because records without full column data fail validation
b) Capture cannot read the redo at all, because records for the table are omitted from the log
c) Apply cannot identify the target row, because the record lacks the values that make it unique
d) The Distribution Service cannot ship the records, because their size is smaller than expected
 
03. One order-management database is the source for three downstream systems. A billing system needs only the invoice tables, a fulfillment system needs only the shipment tables, and an analytics platform needs both.
Which topology describes this configuration?
a) Consolidation, because several destinations are being served from one place
b) Active-active, because more than one system holds copies of the replicated tables
c) Cascading, because the change stream passes through more than one destination on its way
d) Broadcast, with each target receiving the subset of objects its own mapping selects
 
04. How can a parameter file express that a process should cover many objects without every one being listed individually?
a) By naming a set of objects, so that those matching the specification are included
b) By omitting the selection entirely, in which case every object in the database is covered
c) By naming the objects in the shared parameter file, which applies them to every process
d) By listing the objects once in the trail definition, which every process then reads
 
05. Which statement correctly distinguishes Integrated Capture from Classic Capture for an Oracle source database?
a) Integrated Capture applies changes to the target directly, while Classic Capture passes them to a Replicat
b) Integrated Capture receives records from the database log mining server, while Classic Capture reads redo itself
c) Integrated Capture writes its changes to a remote trail, while Classic Capture writes them to a local trail
d) Integrated Capture supports only DML operations, while Classic Capture supports both DML and DDL
 
06. In a Classic Capture configuration for an Oracle source, what is the source of the changes that Extract captures?
a) The online and archived redo logs that Extract interprets directly
b) The checkpoint table maintained for the capture process
c) Triggers placed on each source table that is included in the configuration
d) The local trail written on the source deployment by the previous run
 
07. Apply lag is growing on a busy Oracle target because a single-threaded Replicat cannot keep pace with the source. The workload contains many transactions that touch unrelated rows, but some do depend on one another and must not be applied out of order.
Which change addresses the lag while preserving those dependencies?
a) Configure the Distribution Service to send the trail data more frequently to the target
b) Move to a Replicat type that applies in parallel and respects dependencies
c) Increase the trail file size so that fewer files are opened during the apply
d) Add a second local trail on the source so that capture can write two streams in parallel
 
08. Shortly after change delivery is enabled following an initial load, Replicat begins reporting errors because rows it is trying to update are not present in the target.
Which explanation best fits?
a) The load captured a point in time earlier than it should have, so changes during the load were never carried
b) The load captured a point in time later than the position change delivery resumed from, so updates are arriving for rows the load never included
c) Supplemental logging was enabled after the load, so the change records lack the column values needed to locate rows
d) The trail was written in a format the target cannot read, so records are being applied to the wrong objects
 
09. Why does storing Replicat's checkpoint in a table inside the target database give stronger recovery behavior than holding that position outside the database?
a) The database applies its own locking to the table, so two Replicats can share one checkpoint safely
b) The database backs the table up, so the checkpoint can be restored from the most recent backup after a failure
c) The table records the source redo position, so Replicat can request a replay directly from the source database
d) The two cannot disagree after a failure, because the position commits with the data it describes
 
10. Two data centers will both accept application writes to the same customer tables, and Oracle GoldenGate will keep them synchronized in both directions. Both databases have already been prepared for change capture. During design review an engineer states that the configuration is complete once an Extract and a Replicat exist at each site.
Which requirement has the engineer overlooked?
a) Supplemental logging, because changes captured in a two-way configuration need additional column data
b) A checkpoint table, because a two-way configuration needs Replicat to record its position durably
c) Conflict detection and resolution for the same row changed at both sites
d) A remote trail at each site, because changes have to be readable by the Replicat that applies them

Answers:

Question: 01

Answer: d

Question: 02

Answer: c

Question: 03

Answer: d

Question: 04

Answer: a

Question: 05

Answer: b

Question: 06

Answer: a

Question: 07

Answer: b

Question: 08

Answer: a

Question: 09

Answer: d

Question: 10

Answer: c

 

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