问题:多选题Examine the following command: CREATE TABLE (prod_id number(4), Prod_name varchar2 (20), Category_id number(30), Quantity_on_hand number (3) INVISIBLE); Which three statements are true about using an invisible column in the PRODUCTS table?()AThe %ROWTYPE attribute declarations in PL/SQL to access a row will not display the invisible column in the output.BThe DESCRIBE commands in SQL *Plus will not display the invisible column in the output.CReferential integrity constraint cannot be set on the invisible column.DThe invisible column cannot be made visible and can only be marked as unused.EA primary key constraint can be added on the invisible column.
查看答案
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
问题:多选题You performed an incremental level 0 backup of a database: RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable block change tracking after the incremental level 0 backup, you issued this command: SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’; To perform an incremental level 1 cumulative backup, you issued this command: RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which three statements are true?()ABackup change tracking will sometimes reduce I/O performed during cumulative incremental backups.BThe change tracking file must always be backed up when you perform a full database backup.CBlock change tracking will always reduce I/O performed during cumulative incremental backups.DMore than one database block may be read by an incremental backup for a change made to a single block.EThe incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.
问题:多选题You Execute the Following command to create a password file in the database server: $ orapwd file = ‘+DATA/PROD/orapwprod entries = 5 ignorecase = N format = 12’ Which two statements are true about the password file?()AIt records the usernames and passwords of users when granted the DBA role.BIt contains the usernames and passwords of users for whom auditing is enabled.CIs used by Oracle to authenticate users for remote database administration.DIt records the usernames and passwords of all users when they are added to the OSDBA or OSOPER operating system groups.EIt supports the SYSBACKUP, SYSDG, and SYSKM system privileges.
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 two statements are true about the Oracle Direct Network File system (DNFS)?()AIt utilizes the OS file system cache.BA traditional NFS mount is not required when using Direct NFS.COracle Disk Manager can manage NFS on its own, without using the operating kernel NFS driver.DDirect NFS is available only in UNIX platforms.EDirect NFS can load-balance I/O traffic across multiple network adapters.
问题:多选题On your Oracle Database, you issue the following commands to create indexes: SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customer_id, sales_rep_id) INVISIBLE; SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customer_id, sales_rep_id); Which two statements are true?()AOnly the ORD_CUSTOMER_IX1 index created.BBoth the indexes are updated when a row is inserted, updated, or deleted in the ORDERS table.CBoth the indexes are created: however, only ORD_CUSTOMERS_IX1 is used by the optimizer for queries on the ORDERS table.DThe ORD_CUSTOMER_IX1 index is not used by the optimizer even when the OPTIMIZER_USE_INVISIBLE_INDEXES parameters is set to true.EBoth the indexes are created and used by the optimizer for queries on the ORDERS table.FBoth the indexes are created: however, only ORD_CUSTOMERS_IX2 is used by the optimizer for queries on the ORDERS table.
问题:单选题Flashback is enabled for your multitenant container database (CDB), which contains two pluggable database (PDBs). A local user was accidently dropped from one of the PDBs. You want to flash back the PDB to the time before the local user was dropped. You connect to the CDB and execute the following commands: SQL > SHUTDOWN IMMEDIATE SQL > STARTUP MOUNT SQL > FLASHBACK DATABASE to TIME “TO_DATE (‘08/20/12’ , ‘MM/DD/YY’)”; Examine following commands: 1. ALTER PLUGGABLE DATABASE ALL OPEN; 2. ALTER DATABASE OPEN; 3. ALTER DATABASE OPEN RESETLOGS; Which command or commands should you execute next to allow updates to the flashback back schema?()A Only 1B Only 2C Only 3D 3 and 1E 1 and 2
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 partitioned table maintenance operations support asynchronous Global Index Maintenance inOracle database 12c?()AALTER TABLE SPLIT PARTITIONBALTER TABLE MERGE PARTITIONCALTER TABLE TRUNCATE PARTITIONDALTER TABLE ADD PARTITIONEALTER TABLE DROP PARTITIONFALTER TABLE MOVE PARTITION
问题:单选题Your database is open and the LISTENER listener running. You stopped the wrong listener LISTENER byissuing the following command:lsnrctl > STOPWhat happens to the sessions that are presently connected to the database Instance?()A They are able to perform only queries.B They are not affected and continue to function normally.C They are terminated and the active transactions are rolled back.D They are not allowed to perform any operations until the listener LISTENER is started
问题:单选题In your multitenant container database (CDB) containing pluggable database (PDBs), you granted theCREATE TABLE privilege to the common user C # # A_ADMIN in root and all PDBs. You execute thefollowing command from the root container:SQL > REVOKE create table FROM C # # A_ADMIN;What is the result?()A It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root only.B It fails and reports an error because the CONTAINER=ALL clause is not used.C It excludes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root and all PDBs.D It fails and reports an error because the CONTAINER=CURRENT clause is not used.E It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in all PDBs.
问题:单选题You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB) as a pluggable database (PDB). The characteristics of the non-CDB are as follows: -Version: Oracle Database 12c Releases 1 64-bit -Character set: WE8ISO8859P15 -National character set: AL16UTF16 -O/S: Oracle Linux 6 64-bit The characteristics of the CDB are as follows: -Version: Oracle Database 12c Release 1 64-bit -Character set: AL32UTF8 -O/S: Oracle Linux 6 64-bit Which technique should you use to minimize down time while plugging this non-CDB into the CDB?()A Transportable databaseB Transportable tablespaceC Data Pump full export / importD The DBMS_PDB packageE RMAN
问题:单选题What is the effect of specifying the "ENABLE PLUGGABLE DATABASE" clause in a "CREATEDATABASE” statement?()A It will create a multitenant container database (CDB) with only the root opened.B It will create a CDB with root opened and seed read only.C It will create a CDB with root and seed opened and one PDB mounted.D It will create a CDB that must be plugged into an existing cdb.E It will create a CDB with root opened and seed mounted.
问题:单选题Your are the DBA supporting an Oracle 11g Release 2 database and wish to move a table containing several DATE, CHAR, VARCHAR2, and NUMBER data types, and the table’s indexes, to another tablespace. The table does not have a primary key and is used by an OLTP application. Which technique will move the table and indexes while maintaining the highest level of availability to the application?()A Oracle Data Pump.B An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD to move the indexes.C An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD ONLINE to move the indexes.D Online Table Redefinition.E Edition-Based Table Redefinition.
问题:多选题Examine the following parameters for a database instance: MEMORY_MAX_TARGET=0 MEMORY_TARGET=0 SGA_TARGET=0 PGA_AGGREGATE_TARGET=500m Which three initialization parameters are not controlled by Automatic Shared Memory Management (ASMM)?()ALOG_BUFFERBSORT_AREA_SIZECJAVA_POOL_SIZEDSTREAMS_POOL_SIZEEDB_16K_CACHE_SZIEFDB_KEEP_CACHE_SIZE
问题:单选题In your multitenant container database (CDB) with two pluggable database (PDBs). You want to create a new PDB by using SQL Developer. Which statement is true?()A The CDB must be open.B The CDB must be in the mount stage.C The CDB must be in the nomount stage.D Alt existing PDBs must be closed.
问题:多选题In which two scenarios do you use SQL* Loader to load data?()ATransform the data while it is being loaded into the database.BUse transparent parallel processing without having to split the external data first.CLoad data into multiple tables during the same load statement.DGenerate unique sequential key values in specified columns.
问题:单选题Your multitenant container (CDB) containing three pluggable databases (PDBs) is running in ARCHIVELOG mode. You find that the SYSAUX tablespace is corrupted in the root container. The steps to recover the tablespace are as follows: 1. Mount the CDB. 2. Close all the PDBs. 3. Open the database. 4. Apply the archive redo logs. 5. Restore the data file. 6. Take the SYSAUX tablespace offline. 7. Place the SYSAUX tablespace online. 8. Open all the PDBs with RESETLOGS. 9. Open the database with RESETLOGS. 10. Execute the command SHUTDOWN ABORT. Which option identifies the correct sequence to recover the SYSAUX tablespace?()A 6,5,4,7B 10,1,2,5,8C 10,1,2,5,4,9,8D 10,1,5,8,10