Tag: databases

Questions Related to databases

The employees table is stored in the SAMPLE tablespace. The corresponding IPK_EMP index for the EMPLOYEES table's primary key is stored in INDX tablespace. Out of 12 partitions, only partition P1 of the SALES table is stored in the SAMPLE tablespace. Which object will be exported by this command ? exp system/manager tablespace=SAMPLE

technology databases

  1. Only the EMPLOYEES table.

  2. Only the EMPLOYEES table and its corresponding primary key index.

  3. The EMPLOYEES table and partition P1.

  4. The EMPLOYEES table, IPK_EMP index, and the SALES table.

Show answer
Correct Option: D

In user-managed backup and recover procedure, how are data files backed up ?
technology databases

  1. Using SQL commands.

  2. Using SQL*Plus Commands.

  3. Using operating system commands.

  4. Using Recover Manager commands.

Show answer
Correct Option: C

When performing an incomplete recovery of the whole database, what must be true about the data files that are restored ?
technology databases

  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.

Show answer
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?
technology databases

  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

Show answer
Correct Option: A

Which statement is ture regarding checkpoints and recovery ?
technology databases

  1. A checkpoint defines the highest system change number (SCN)

  2. All redo entries higher or at the SCN are known to be written to the data files.

  3. Only the redo records containing SCNs higher then the checkpoint need to be applied during recovery.

  4. The LOG_CHECKPOINT_INTERVAL initialization paramter specifies the amount of time beteen incremental checkpoints.

Show answer
Correct Option: C

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?
technology databases

  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.

Show answer
Correct Option: A

You issue this statement ALTER DATABASE BACKUP CONTROLFILE TO TRACE; What does the statment generate ?
technology databases

  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.

Show answer
Correct Option: D

Which statement is true regarding RMAN components?

technology databases

  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.

Show answer
Correct Option: C

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

  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.

Show answer
Correct Option: A

Your database is running in NOARCHIVELOG mode. Every night there is a backup taken using RMAN. During your startup this morning you received an error regarding DISK 3 on your server.This is the location of your data file for the SYSTEM tablespace. Which option is open to you?
technology databases

  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.

Show answer
Correct Option: D