问题:单选题In your multitenant container database (CDB) containing pluggable databases (PDB), users complain about performance degradation. How does real-time Automatic database Diagnostic Monitor (ADDM) check performance degradation and provide solutions?()A It collects data from SGA and compares it with a preserved snapshot.B It collects data from SGA, analyzes it, and provides a report.C It collects data from SGA and compares it with the latest snapshot.D It collects data from both SGA and PGA, analyzes it, and provides a report
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问题:多选题Which three statements are true concerning unplugging a pluggable database (PDB)?()AThe PDB must be open in read only mode.BThe PDB must be dosed.CThe unplugged PDB becomes a non-cdb.DThe unplugged PDB can be plugged into the same multitenant container database (CDB)EThe unplugged PDB can be plugged into another cdb.FThe PDB data files are automatically removed from disk.
问题:多选题In your Database, the TBS PERCENT USED parameter is set to 60 and the TBS PERCENT FREE parameter is set to 20. Which two storage-tiering actions might be automated when using information Lifecycle Management (ILM) to automate data movement?()AThe movement of all segments to a target tablespace with a higher degree of compression, on a different storage tier, when the source tablespace exceeds TBS PERCENT USEDBSetting the target tablespace to read-onlyCThe movement of some segments to a target tablespace with a higher degree of compression, on a different storage tier, when the source tablespace exceeds TBS PERCENT USEDDSetting the target tablespace offlineEThe movement of some blocks to a target tablespace with a lower degree of compression, on a different storage tier, when the source tablespace exceeds TBS PERCENT USED
问题:多选题Which two statements are true about the RMAN validate database command?()AIt checks the database for intrablock corruptions.BIt can detect corrupt pfiles.CIt can detect corrupt spfiles.DIt checks the database for interblock corruptions.EIt can detect corrupt block change tracking files.
问题:单选题Examine the following command:ALTER SYSTEM SET enable_ddl_logging=FALSE;Which statement is true?()A None of the data definition language (DDL) statements are logged in the trace file.B Only DDL commands that resulted in errors are logged in the alert log file.C A new log.xml file that contains the DDL statements is created, and the DDL command details are removed from the alert log file.D Only DDL commands that resulted in the creation of new database files are logged.
问题:多选题A warehouse fact table in your Oracle 12c Database is range-partitioned by month and accessed frequently with queries that span multiple partitions The table has a local prefixed, range partitioned index. Some of these queries access very few rows in some partitions and all the rows in other partitions, but these queries still perform a full scan for all accessed partitions. This commonly occurs when the range of dates begins at the end of a month or ends close to the start of a month. You want an execution plan to be generated that uses indexed access when only a few rows are accessed from a segment, while still allowing full scans for segments where many rows are returned. Which three methods could transparently help to achieve this result?()AUsing a partial local Index on the warehouse fact table month column with indexing disabled to the table partitions that return most of their rows to the queries.BUsing a partial local Index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.CUsing a partitioned view that does a UNION ALL query on the partitions of the warehouse fact table, which retains the existing local partitioned column.DConverting the partitioned table to a partitioned view that does a UNION ALL query on the monthly tables, which retains the existing local partitioned columnEUsing a partial global index on the warehouse fact table month column with indexing disabling for the table partitions that return most of their rows to the queries.FUsing a partial global index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.
问题:单选题Oracle Grid Infrastructure for a stand-alone server is installed on your production host before installing the Oracle Database server. The database and listener are configured by using Oracle Restart. Examine the following command and its output: $ crsctl config has CRS-4622: Oracle High Availability Services auto start is enabled. What does this imply?()A When you start an instance on a high with SQL *Plus dependent listeners and ASM disk groups are automatically started.B When a database instance is started by using the SRVCTL utility and listener startup fails, the instance is still started.C When a database is created by using SQL* Plus, it is automatically added to the Oracle Restart configuration.D When you create a database service by modifying the SERVICE_NAMES initialization parameter, it is automatically added to the Oracle Restart configuration.
问题:多选题Which three statements are true regarding the use of the Database Migration Assistant for Unicode(DMU)?()AA DBA can check specific tables with the DMUBThe database to be migrated must be opened read-only.CThe release of the database to be converted can be any release since 9.2.0.8.DThe DMU can report columns that are too long in the converted characterset.EThe DMU can report columns that are not represented in the converted characterset.
问题:单选题Your database supports an online transaction processing (OLTP) application. The application is undergoing some major schema changes, such as addition of new indexes and materialized views. You want to check the impact of these changes on workload performance. What should you use to achieve this?()A Database replayB SQL Tuning AdvisorC SQL Access AdvisorD SQL Performance AnalyzerE Automatic Workload Repository compare reports
问题:单选题You are connected to a pluggable database (PDB) as a common user with DBA privileges. The STATISTICS_LEVEL parameter is PDB_MODIFIABLE. You execute the following: SQL > ALTER SYSTEM SET STATISTICS_LEVEL = ALL SID = ‘*’ SCOPE = SPFILE; Which is true about the result of this command?()A The STATISTICS_LEVEL parameter is set to all whenever this PDB is re-opened.B The STATISTICS_LEVEL parameter is set to ALL whenever any PDB is reopened.C The STATISTICS_LEVEL parameter is set to all whenever the multitenant container database (CDB) is restarted.D Nothing happens; because there is no SPFILE for each PDB, the statement is ignored.
问题:多选题You notice that the elapsed time for an important database scheduler Job is unacceptably long. The job belongs to a scheduler job class and window. Which two actions would reduce the job's elapsed time?()AIncreasing the priority of the job class to which the job belongsBIncreasing the job's relative priority within the Job class to which it belongsCIncreasing the resource allocation for the consumer group mapped to the scheduler job's job class within the plan mapped to the scheduler windowDMoving the job to an existing higher priority scheduler window with the same schedule and durationEIncreasing the value of the JOB_QUEUE_PROCESSES parameterFIncreasing the priority of the scheduler window to which the job belongs
问题:多选题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?()AUse 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.BUse the MKDG command to restore the disk group with the same configuration as the backed-up disk group and data on the disk group.CUse 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.DUse 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.EUse the MD_RESTORE command to restore both the metadata and data for the failed disk group.FUse 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 the data.
问题:多选题Which three statements are true about using flashback database in a multitenant container database(CDB)?()AThe root container can be flashed back without flashing back the pluggable databases (PDBs).BTo enable flashback database, the CDB must be mounted.CIndividual PDBs can be flashed back without flashing back the entire cdb.DThe DB_FLASHBACK RETENTION_TARGET parameter must be set to enable flashback of the cdb.EA CDB can be flashed back specifying the desired target point in time or an SCN, but not a restore point.
问题:多选题You upgraded your database from pre-12c to a multitenant container database (CDB) containing pluggable databases (PDBs). Examine the query and its output: Which two tasks must you perform to add users with SYSBACKUP, SYSDG, and SYSKM privilege to the password file?()AAssign the appropriate operating system groups to SYSBACKUP, SYSDG, SYSKM.BGrant SYSBACKUP, SYSDG, and SYSKM privileges to the intended users.CRe-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege and the FORCE argument set to No.DRe-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege, and FORCE arguments set to Yes.ERe-create the password file in the Oracle Database 12c format.
问题:单选题You database is running an ARCHIVELOG mode. The following parameter are set in your database instance: LOG_ARCHIVE_FORMAT = arch+%t_%r.arc LOG_ARCHIVE_DEST_1 = ‘LOCATION = /disk1/archive’ DB_RECOVERY_FILE_DEST_SIZE = 50G DB_RECOVERY_FILE = ‘/u01/oradata’ Which statement is true about the archived redo log files?()A They are created only in the location specified by the LOG_ARCHIVE_DEST_1 parameter.B They are created only in the Fast Recovery Area.C They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and in the default location $ORACLE_HOME/dbs/arch.D They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and the location specified by the DB_RECOVERY_FILE_DEST parameter.
问题:多选题Which two statements are true about variable extent size support for large ASM files?()AThe metadata used to track extents in SGA is reduced.BRebalance operations are completed faster than with a fixed extent sizeCAn ASM Instance automatically allocates an appropriate extent size.DResync operations are completed faster when a disk comes online after being taken offline.EPerformance improves in a stretch cluster configuration by reading from a local copy of an extent.
问题:多选题Examine the commands executed to monitor database operations: $> conn sys oracle/oracle@prod as sysdba SQL > VAR eid NUMBER SQL > EXEC: eid := DBMS_SQL_MONITOR.BEGIN_OPERATION (‘batch_job’ , FORCED_TRACKING => ‘Y’); Which two statements are true?()ADatabase operations will be monitored only when they consume a significant amount of resource.BDatabase operations for all sessions will be monitored.CDatabase operations will be monitored only if the STATISTICS_LEVEL parameter is set to TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS is set DIAGNISTIC + tuning.DOnly DML and DDL statements will be monitored for the session.EAll subsequent statements in the session will be treated as one database operation and will be monitored.
问题:多选题Identify two correct statements about multitenant architectures.()AMultitenant architecture can be deployed only in a Real Application Clusters (RAC) configuration.BMultiple pluggable databases (PDBs) share certain multitenant container database (CDB) resources.CMultiple CDBs share certain PDB resources.DMultiple non-RAC CDB instances can mount the same PDB as long as they are on the same server.EPatches are always applied at the CDB level.FA PDB can have a private undo tablespace.
问题:多选题Which three are true about the large pool for an Oracle database instance that supports shared serverconnections?()AAllocates memory for RMAN backup and restore operationsBAllocates memory for shared and private SQL areasCContains a cursor area for storing runtime information about cursorsDContains stack spaceEContains a hash area performing hash joins of tables