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databases Online Quiz - 167

Description: databases Online Quiz - 167
Number of Questions: 20
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Tags: databases
Attempted 0/20 Correct 0 Score 0

The ORDERS table has a constant transaction load 24 hours a day, so down time is not allowed. The index become fragmented. Whic statment is true ?

  1. The index need to be dropped, and then re-created.

  2. The resolution of index fragmentation depends on the type of index.

  3. The index can be rebuilt while users continue working on the table.

  4. The fragmented can be ignored because Oracle resolve index fragmentation by means of a freelist.

  5. The index can be rebuilt, but users will not have access to the index during this time.


Correct Option: C
  1. The oracle server creates no undo tablespace.

  2. The oracle server creates an undo segment in the system tablespace.

  3. The oracle server cerates one undo tablespace with the name SYS_UNDOTBS.

  4. Database creation fails because you did not specify an undo tablespace on the create database statment.


Correct Option: C
  1. SELECT text FROM user_source WHERE name = 'SALARY_CALC';

  2. SELECT * FROM user_source WHERE name='SALARY_CALC';

  3. SELECT * FROM user_objects WHERE object_name='SALARY_CALC';

  4. SELECT * FROM user_procedures WHERE object_name='SALARY_CALC';

  5. SELECT text FROM user_source WHERE name='SALARY_CALC' and owner='JOHN'


Correct Option: A

You want to drop the TBSI tablespace from your database. You also want to delete corresponding data files automatically, and not have to do it manually. What should you do ?

  1. User the DROP DATAFILE command.

  2. Use the DROP TABLESPACE command.

  3. Ensure that all database files are Oracle Managed Files(OMF) before using the DROP TABLESPACE command.

  4. Ensure that the DB_FILE_CREATE_DEST initialization parameter is set before using the DROP TABLESPACE command.


Correct Option: B

Consider this syntax MERGE INTO t1 USING t2 ON (join predicate) .... What does the MERGE syntax do ?

  1. It performs a merge join of the row from T2 only if it does'nt exist in the T1 table.

  2. It creates a natural join of table T1 and T2 for all columns that have the same name.

  3. It creates a Cartesian prodcut of table T1 and table T2 for all columns that have the same name.

  4. For each row from T2, it updates the row if it exists witin table T1, otherwise it inserts the row into T1.


Correct Option: D

Examine the statement : DROP TABLESPACE IND2 INCLUDING CONTENTS AND DATAFILES; What is the result of the statement?

  1. The contents and data files belonging to the IND2 tablespace are dropped.

  2. The statement will only succeed if the IND2 tablespace was built using Oracle-Managed Files (OMF) data files.

  3. The statement will only succeed if the data files belonging to the IND2 tablespace are Oracle Managed Files (OMF) or of the database was created using OMF.

  4. The contents of the tablespace are dropped along with all its data files except those identical with Oracle-Managed Files (OMF) naming convention.


Correct Option: A

A user is running a long update batch file. Many tables are updated and all the statements are in one transaction. Before the process is finished, the user machine lost power. When the user calls you, what should you do as DBA?

  1. Do nothing, the PMON process handles everything.

  2. Shut down the database and restore all the tables the user was updating.

  3. Log in as DBA, clean up the partial updates in those tables, and do another manual backup.

  4. Use LogMiner to find out which records are changed based on the user’s ID, then roll back all those changes.


Correct Option: A
  1. The data file needs to be restored by using operating system commands, because a data file movement must take place, and then the database can be recovered from RMAN.

  2. The data file needs to be restored by using operating system commands, since a data file movement must take place, and then the database must be recovered manually.

  3. From RMAN you can issue the commands RESTORE and RECOVER. RMAN automatically restores the data file on DISK 3 to another disk, based upon utilization statistics.

  4. From RMAN you can issue a SET NEWNAME command to update the data file location information in the control file, and then issue the RESTORE and RECOVER commands to recover the database.


Correct Option: D
  1. All of the data files must be from a backup taken prior to the point in time to which you want to recover.

  2. Only the data files belonging from the SYSTEM tablespace must be from a backup taken prior to the point in time to which you want to recover.

  3. Only the data files that need recovery must be from a backup taken prior to the point in time which you want to recover.

  4. Only the data files belonging to the SYSTEM tablespace and the data files that need recovery must be from a backup taken prior to the point in time to which you want to recover.


Correct Option: A

You have performed the first step in placing your database into ARCHIVELOG mode. The second step is deciding whether the online redo log files are to be archived automatically or manually. which action should you take to enable archiving an instance startup?

  1. Set the LOG_ARCHIVE_START parameter to TRUE in the initialization parameter file.

  2. Automatic archive is the default when ARCHIVELOG mode is set. No further actions are required.

  3. Set the LOG_ARCHIVE_MAX_PROCESSES parameter to n (where n is the number of Archiver process) in the initialization parameter file.

  4. Immediately after setting the database in ARCHIVELOG mode, in SQL*Plus select automatic archiving using the syntax : ALTER DATABASE SET LOG_ARCHIVE_START=TRUE


Correct Option: A
  1. A text copy of the control file.

  2. A binary copy of the control file.

  3. A file containing a SQL statement which will re-create the database.

  4. A file containing a SQL statement which will re-create the control file.


Correct Option: D
  1. Each target database requires its own recover catalog.

  2. RMAN scripts can be stored in the recovery catalog or the targer control file.

  3. A channel is a stream of data to a device type and corresponds to one server session.

  4. The RMAN executable interprets server session commands and establishes connections to the target database.


Correct Option: C
  1. Only when the new master site already has existing replication groups.

  2. By issuing a single command to create , populate, and activate the new master.

  3. When the master definition site is not the same for all of the master grouups.

  4. Without impacting end users who are executing data manipulation language (DML) commands on the replicated tables.


Correct Option: D
  1. Data encryption

  2. User authentication

  3. Transparent data conversion

  4. Configuration and administration mechanisms

  5. Support for multiple network transport protocols


Correct Option: C,D,E
  1. TARGET_REDO_BLKS

  2. FAST_START_IO_TARGET

  3. LOG_CHECKPOINT_TIMEOUT

  4. RECOVERY_ESTIMATED_IOS

  5. LOG_FILE_SIZE_REDO_BLKS

  6. LOG_CHECKPOINT_INTERVAL


Correct Option: B,C,F
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