Answer / hemant shrimali (dba)

alter tablespace T1
add datafile 'c:\xx\T1.dbf' size 4M autoextend off;

Answer / vinoth kumar

alter tablespace <tablespacename> add datafile 'u01
\oradata\db\test01.dbf' size 10m autoextend on next 5m
maxsize 50m

in prodution database autoextend off is to be avoid.

Answer / suman

alter database tablespace ts1 add datafile
'/u01/oradata/directory name/ts1.dbf' size 5m autoextend on;

Explian different types of BACKUPs avaialabe in SQL Server? Given a particular scenario, how would you go about choosing a backup plan?

1 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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Give two examples of referential integrity constraints.

2 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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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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Explain the use of setting GLOBAL_NAMES equal to TRUE.

1 Answers  

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What types of replication are supported in sql server? : sql server DBA

0 Answers  

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What are the different ways of moving data or databases between servers and databases in SQL Server?

3 Answers  

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When creating a user, what permissions must you grant to allow them to connect to the database?

3 Answers  

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How would you determine what sessions are connected and what resources they are waiting for?

2 Answers  

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How does Oracle guarantee data integrity of data changes?

1 Answers   SoftSol,

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what is incremental checkpoint?

1 Answers   CTS,

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