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Oracle DBA Interview Questions By B G
4. Define the SGA and:
? How you would configure SGA for a mid-sized OLTP environment?
? What is involved in tuning the SGA?
5. What is the cache hit ratio, what impact does it have on performance of an Oracle database and what is involved in tuning it?
7. How do you tell what your machine name is and what is its IP address?
8. How would you go about verifying the network name that the local_listener is currently using?
nbsp;can you determine which shared memory and semaphores are associated with which instance?
13. Assuming today is Monday, how would you use the DBMS_JOB package to schedule the execution of a given procedure owned by SCOTT to start Wednesday at 9AM and to run subsequently every other day at 2AM.
15. What do the 9i dbms_standard.sql_txt() and dbms_standard.sql_text() procedures do?
16. In which dictionary table or view would you look to determine at which time a snapshot or MVIEW last successfully refreshed?
MVIEW couldn't FAST REFRESH?
18. How does propagation differ between Advanced Replication and Snapshot Replication (readonly)?
23. How would you extract DDL of a table without using a GUI tool?
24. You're getting high "busy buffer waits" - how can you find what's causing it?
25. What query tells you how much space a tablespace named "test" is taking up, and how much space is remaining?
27. Database crashes. Corruption is found scattered among the file system neither of your doing nor of Oracle's.
What database recovery options are available? Database is in archive log mode.
28. Illustrate how to determine the amount of physical CPUs a Unix Box possesses (LINUX and/or Solaris).
35. Why does Oracle not permit the use of PCTUSED with indexes?
36. What would you use to improve performance on an insert statement that places millions of rows into that table?
in
script from a specific directory, what UNIX command from that directory structure can you
run to find your answer?
41. How would you configure your networking files to connect to a database by the name of DSS which resides in domain icallinc.com?
My catalog db is called rman. How would you run this shell script from the O/S such that it would run as a background process?
49. You have found corruption in a tablespace that contains static tables that are part of a database that is in NOARCHIVE log mode.
How would you restore the tablespace without losing new data in the other tablespaces?
50. How do you recover a datafile that has not been physically been backed up since its creation and has been deleted. Provide syntax example.
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