Answer / bharath

Perform below steps

1) alter database datafile < file_id> offline;
2) alter database create datafile <file_id>;
3) recover datafile <file_id>;
4) alter database datafile <file_id> online;

Answer / mallesh

To create datafile,we need the current controlfile or buckup controlfile that recognises the new datafile that was added.
we go to mount stage and create new datafile using command
syntax:
>alter database create datafile;
>alter tablespace <tsname> add datafile '<location>' size;
>alter system switch logfile;

Answer / shiva

>alter database create datafile < path>;
> alter database recover automatic datafile < path> /<file_id>

Answer / nehru

>alter database create datafile 'old path' as 'new path' size
>recover datafile 'datafile id';

A table is classified as a parent table and you want to drop and re-create it. How would you do this without affecting the children tables?

0 Answers  

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Should you place Recovery Catalog in the Same DB? . Can you use RMAN without Recovery catalog

4 Answers  

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You're getting high "busy buffer waits" - how can you find what's causing it?

1 Answers  

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what r the types of backup?

5 Answers   CSC,

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In which dictionary table or view would you look to determine at which time a snapshot or MVIEW last successfully refreshed?

0 Answers  

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SUPPOSE AS A DBA YOU CREATED ONE USER BY DEFAULT HOW MANY PRIVILIZES WILL COME TO USER & WHERE CAN YOU SEE THAT PRIVILIZES.

4 Answers   Cognizant,

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What are the steps you will take, if you are tasked with securing an SQL Server?

1 Answers   STC,

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Define the SGA and: How you would configure SGA for a mid-sized OLTP environment? What is involved in tuning the SGA?

0 Answers  

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7. Where should you place Archive logfiles, in the same disk where DB is or another disk? 8. Can you take online backup of a Control file if yes, how? 9. What is a Logical Backup? 10. Should you take the backup of Logfiles if the database is running in ARCHIVELOG mode? 11. Why do you take tablespaces in Backup mode? 12. What is the advantage of RMAN utility? 13. How RMAN improves backup time? 14. Can you take Offline backups using RMAN? 15. How do you see information about backups in RMAN? 21. Where RMAN keeps information of backups if you are using RMAN without Catalog? 22. You have taken a manual backup of a datafile using o/s. How RMAN will know about it? 23. You want to retain only last 3 backups of datafiles. How do you go for it in RMAN? 24. Which is more efficient Incremental Backups using RMAN or Incremental Export? 25. Can you start and shutdown DB using RMAN? 26. How do you recover from the loss of datafile if the DB is running in NOARCHIVELOG mode? 27. You loss one datafile and it does not contain important objects. The important objects are there in other datafiles which are intact. How do you proceed in this situation? 28. You lost some datafiles and you don't have any full backup and the database was running in NOARCHIVELOG mode. What you can do now? 29. How do you recover from the loss of datafile if the DB is running in ARCHIVELOG mode? 30. You loss one datafile and DB is running in ARCHIVELOG mode. You have full database backup of 1 week old and partial backup of this datafile which is just 1 day old. From which backup should you restore this file? 31. You loss controlfile how do you recover from this? 32. The current logfile gets damaged. What you can do now? 33. What is a Complete Recovery? 34. What is Cancel Based, Time based and Change Based Recovery? 35. Some user has accidentally dropped one table and you realize this after two days. Can you recover this table if the DB is running in ARCHIVELOG mode? 36. Do you have to restore Datafiles manually from backups if you are doing recovery using RMAN? 37. A database is running in ARCHIVELOG mode since last one month. A datafile is added to the database last week. Many objects are created in this datafile. After one week this datafile gets damaged before you can take any backup. Now can you recover this datafile when you don't have any backups? 38. How do you recover from the loss of a controlfile if you have backup of controlfile? 39. Only some blocks are damaged in a datafile. Can you just recover these blocks if you are using RMAN? 40. Some datafiles were there on a secondary disk and that disk has become damaged and it will take some days to get a new disk. How will you recover from this situation? 41. Have you faced any emergency situation. Tell us how you resolved it? 42. At one time you lost parameter file accidentally and you don't have any backup. How you will recreate a new parameter file with the parameters set to previous values. 16. What is a Recovery Catalog? 17. Should you place Recovery Catalog in the Same DB? 18. Can you use RMAN without Recovery catalog? 19. Can you take Image Backups using RMAN? 20. Can you use Backupsets created by RMAN with any other utility?

1 Answers   IBM,

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Which dictionary tables and/or views would you look at to diagnose a locking issue?

2 Answers  

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How can you gather statistics on a table?

3 Answers  

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You create a private database link <link name> and upon connection, fails with: ORA-2085: <Link name> connects to <fully qualified remote db name>. What is the problem? How would you go about resolving this error?

0 Answers  

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