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Question 26
Which three factors influence the optimizer's choice of an execution plan? (Choose three.)
- A: the optimizer_mode initialization parameter
- B: operating system (OS) statistics
- C: cardinality estimates
- D: object statistics in the data dictionary
- E: fixed baselines
Question 27
Your multitenant container database (CDB) contains pluggable databases (PDBs), you are connected to the HR_PDB. You execute the following command:
SQL > CREATE UNDO TABLESPACE undotb01
DATAFILE u01/oracle/rddb1/undotbs01.dbf SIZE 60M AUTOEXTEND ON;
What is the result?
- A: It executes successfully and creates an UNDO tablespace in HR_PDB.
- B: It falls and reports an error because there can be only one undo tablespace in a CDB.
- C: It fails and reports an error because the CONTAINER=ALL clause is not specified in the command.
- D: It fails and reports an error because the CONTAINER=CURRENT clause is not specified in the command.
- E: It executes successfully but neither tablespace nor the data file is created.
Question 28
Which three statements are true about SQL plan directives? (Choose three.)
- A: They are tied to a specific statement or SQL ID.
- B: They instruct the maintenance job to collect missing statistics or perform dynamic sampling to generate a more optimal plan.
- C: They are used to gather only missing statistics.
- D: They are created for a query expression where statistics are missing or the cardinality estimates by the optimizer are incorrect.
- E: They instruct the optimizer to create only column group statistics.
- F: Improve plan accuracy by persisting both compilation and execution statistics in the SYSAUX tablespace.
Question 29
Examine these two statements:
Which three are true about the MRKT tablespace? (Choose three.)
- A: The MRKT tablespace is created as a small file tablespace, because the file size is less than the minimum required for big file files.
- B: The MRKT tablespace may be dropped if it has no contents.
- C: Users who were using the old default tablespace will have their default tablespaces changed to the MRKT tablespace.
- D: No more data files can be added to the tablespace.
- E: The relative file number of the tablespace is not stored in rowids for the table rows that are stored in the MRKT tablespace.
Question 30
In your database, you want to ensure that idle sessions that are blocking active are automatically terminated after a specified period of time.
How would you accomplish this?
- A: Setting a metric threshold
- B: Implementing Database Resource Manager
- C: Enabling resumable timeout for user sessions
- D: Decreasing the value of the IDLE_TIME resource limit in the default profile
Question 31
Which two statements are true about Oracle Data Pump export and import operations? (Choose two.)
- A: You can detach from a data pump export job and reattach later.
- B: Data pump uses parallel execution server processes to implement parallel import.
- C: Data pump import requires the import file to be in a directory owned by the oracle owner.
- D: The master table is the last object to be exported by the data pump.
- E: You can detach from a data pump import job and reattach later.
Question 32
Examine the query and its output executed In an RDBMS Instance:
Which three statements are true about the users (other than sys) in the output? (Choose three.)
- A: The C # # B_ADMIN user can perform all backup and recovery operations using RMAN only.
- B: The C # # C_ADMIN user can perform the data guard operation with Data Guard Broker.
- C: The C # # A_ADMIN user can perform wallet operations.
- D: The C # # D_ADMIN user can perform backup and recovery operations for Automatic Storage Management (ASM).
- E: The C # # B_ADMIN user can perform all backup and recovery operations using RMAN or SQL* Plus.
Question 33
Examine the resources consumed by a database instance whose current Resource Manager plan is displayed.
Which two statements are true? (Choose two.)
- A: An attempt to start a new session by a user belonging to DSS_QUERIES fails with an error.
- B: An attempt to start a new session by a user belonging to OTHER_GROUPS fails with an error.
- C: The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to resource management.
- D: The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to I/O waits and latch or enqueue contention.
- E: A user belonging to the DSS__QUERIES resource consumer group can create a new session but the session will be queued.
Question 34
Which three statements are true about Flashback Database? (Choose three.)
- A: Flashback logs are written sequentially, and are archived.
- B: Flashback Database uses a restored control file to recover a database.
- C: The Oracle database automatically creates, deletes, and resides flashback logs in the Fast Recovery Area.
- D: Flashback Database can recover a database to the state that it was in before a reset logs operation.
- E: Flashback Database can recover a data file that was dropped during the span of time of the flashback.
- F: Flashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.
Question 35
Which statement is true about Enterprise Manager (EM) express in Oracle Database 12c?
- A: By default, EM express is available for a database after database creation.
- B: You can use EM express to manage multiple databases running on the same server.
- C: You can perform basic administrative tasks for pluggable databases by using the EM express interface.
- D: You cannot start up or shut down a database Instance by using EM express.
- E: You can create and configure pluggable databases by using EM express.
Question 36
Examine the following command;
ALTER SYSTEM SET enable_ddl_logging = TRUE;
Which statement is true?
- A: Only the data definition language (DDL) commands that resulted in errors are logged in the alert log file.
- B: All DDL commands are logged in the alert log file.
- C: All DDL commands are logged in a different log file that contains DDL statements and their execution dates.
- D: Only DDL commands that resulted in the creation of new segments are logged.
- E: All DDL commands are logged in XML format in the alert directory under the Automatic Diagnostic Repository (ADR) home.
Question 37
In which two scenarios do you use SQL* Loader to load data? (Choose two.)
- A: Transform the data while it is being loaded into the database.
- B: Use transparent parallel processing without having to split the external data first.
- C: Load data into multiple tables during the same load statement.
- D: Generate unique sequential key values in specified columns.
Question 38
Which two are prerequisites for performing a flashback transaction? (Choose two.)
- A: Flashback Database must be enabled.
- B: Undo retention guarantee for the database must be configured.
- C: EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.
- D: Supplemental logging must be enabled.
- E: Recycle bin must be enabled for the database.
- F: Block change tracking must be enabled tor the database.
Question 39
A database is stored in an Automatic Storage Management (ASM) disk group, disk group, DGROUP1 with SQL:
There is enough free space in the disk group for mirroring to be done.
What happens if the CONTROLLER1 failure group becomes unavailable due to error of for maintenance?
- A: Transactions and queries accessing database objects contained in any tablespace stored in DGROUP1 will fall.
- B: Mirroring of allocation units will be done to ASM disks in the CONTROLLER2 failure group until the CONTROLLER1 for failure group is brought back online.
- C: The data in the CONTROLLER1 failure group is copied to the controller2 failure group and rebalancing is initiated.
- D: ASM does not mirror any data until the controller failure group is brought back online, and newly allocated primary allocation units (AU) are stored in the controller2 failure group, without mirroring.
- E: Transactions accessing database objects contained in any tablespace stored in DGROUP1 will fail but queries will succeed.
Question 40
On your Oracle 12c database, you Issue the following commands to create indexes
SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE;
SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id);
Which two statements are correct? (Choose two.)
- A: Both the indexes are created; however, only the ORD_COSTOMER index is visible.
- B: The optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan.
- C: Only the ORD_CUSTOMER_IX1 index is created.
- D: Only the ORD_CUSTOMER_IX2 index is created.
- E: Both the indexes are updated when a new row is inserted, updated, or deleted In the orders table.
Question 41
Identify three benefits of Unified Auditing.
- A: Decreased use of storage to store audit trail rows in the database.
- B: It improves overall auditing performance.
- C: It guarantees zero-loss auditing.
- D: The audit trail cannot be easily modified because it is read-only.
- E: It automatically audits Recovery Manager (RMAN) events.
Question 42
Which action takes place when a file checkpoint occurs?
- A: The checkpoint position is advanced in the checkpoint queue.
- B: All buffers for a checkpointed file that were modified before a specific SCN are written to disk by DBWn and the SCN is stored in the control file.
- C: The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.
- D: The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.
Question 43
You upgraded from a previous Oracle database version to Oracle Database version to Oracle Database 12c. Your database supports a mixed workload. During the day, lots of insert, update, and delete operations are performed. At night, Extract, Transform, Load (ETL) and batch reporting jobs are run. The ETL jobs perform certain database operations using two or more concurrent sessions.
After the upgrade, you notice that the performance of ETL jobs has degraded. To ascertain the cause of performance degradation, you want to collect basic statistics such as the level of parallelism, total database time, and the number of I/O requests for the ETL jobs.
How do you accomplish this?
- A: Examine the Active Session History (ASH) reports for the time period of the ETL or batch reporting runs.
- B: Enable SQL tracing for the queries in the ETL and batch reporting queries and gather diagnostic data from the trace file.
- C: Enable real-time SQL monitoring for ETL jobs and gather diagnostic data from the V$SQL_MONITOR view.
- D: Enable real-time database operation monitoring using the DBMS_SQL_MONITOR.BEGIN_OPERATION function, and then use the
Question 44
Examine the following commands for redefining a table with Virtual Private Database (VPD) policies:
Which two statements are true about redefining the table? (Choose two.)
- A: All the triggers for the table are disabled without changing any of the column names or column types in the table.
- B: The primary key constraint on the EMPLOYEES table is disabled during redefinition.
- C: VPD policies are copied from the original table to the new table during online redefinition.
- D: You must copy the VPD policies manually from the original table to the new table during online redefinition.
Question 45
Which two statements are true about the use of the procedures listed in the v$sysaux_occupants.move_procedure column? (Choose two.)
- A: The procedure may be used for some components to relocate component data to the SYSAUX tablespace from its current tablespace.
- B: The procedure may be used for some components to relocate component data from the SYSAUX tablespace to another tablespace.
- C: All the components may be moved into SYSAUX tablespace.
- D: All the components may be moved from the SYSAUX tablespace.
Question 46
Which statement is true about Oracle Net Listener?
- A: It acts as the listening endpoint for the Oracle database instance for all local and non-local user connections.
- B: A single listener can service only one database instance and multiple remote client connections.
- C: Service registration with the listener is performed by the process monitor (PMON) process of each database instance.
- D: The listener.ora configuration file must be configured with one or more listening protocol addresses to allow remote users to connect to a database instance.
- E: The listener.ora configuration file must be located in the ORACLE_HOME/network/admin directly.
Question 47
You are administering a database stored in Automatic Storage Management (ASM). You use RMAN to back up the database and the MD_BACKUP command to back up the ASM metadata regularly. You lost an ASM disk group DG1 due to hardware failure.
In which three ways can you re-create the lost disk group and restore the data? (Choose three.)
- A: Use the MD_RESTORE command to restore metadata for an existing disk group by passing the existing disk group name as an input parameter and use RMAN to restore the data.
- B: Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group and data on the disk group.
- C: Use the MD_RESTORE command to restore the disk group with the changed disk group specification, failure group specification, name, and other attributes and use RMAN to restore the data.
- D: Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group name and same set of disks and failure group configuration, and use RMAN to restore the data.
- E: Use the MD_RESTORE command to restore both the metadata and data for the failed disk group.
- F: Use the MKDG command to add a new disk group DG1 with the same or different specifications for failure group and other attributes and use RMAN to restore
Question 48
Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database.
You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file for the default permanent tablespace USERDATA belonging to
ACCOUNTS_PDB is corrupted.
What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB?
- A: Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PDB.
- B: Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.
- C: Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED command.
- D: Take the USERDATA tablespace offline in ACCOUNTS_PDB.
Question 49
Examine the structure of the sales table, which is stored in a locally managed tablespace with Automatic Segment Space Management (ASSM) enabled.
You want to perform online segment shrink to reclaim fragmented free space below the high water mark.
What should you ensure before the start of the operation?
- A: Row movement is enabled.
- B: Referential integrity constraints for the table are disabled.
- C: No queries are running on this table.
- D: Extra disk space equivalent to the size of the segment is available in the tablespace.
- E: No pending transaction exists on the table.
Question 50
Which two statements are true about the Automatic Database Diagnostic Monitor (ADDM)? (Choose two.)
- A: The ADDM requires at least four AWR snapshots for analysis
- B: The ADDM runs after each AWR snapshot is collected automatically by MMON
- C: The results of the ADDM analysis are stored in the Automatic Workload Repository (AWR)
- D: The ADDM analysis provides only diagnostics information but does not provide recommendations
- E: The ADDM calls other advisors if required, but does not provide recommendations about the advisors
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