Freshers Oracle interview Tips

Freshers Oracle interview Tips

1. List components of an Oracle instance?
2. Which background process and associated database component guarantees that committed data is saved even when the changes have not been recorded in the data files?
3. What is the maximum number of database writer processes allowed in an Oracle instance?
4. Which background process is not started by default when you start up the Oracle instance?
5. Describe a parallel server configuration.
6. Choose the right hierarchy, from largest to smallest, from this list of logical database structures.
7. Which component of the SGA contains the parsed SQL code?
8. Name the stages of processing a DML statement. What stages are part of processing a query?
9. Which background process is responsible for writing the dirty buffers to the database files?
10. Which component in the SGA has the dictionary cache?
11. When a server process is terminated abnormally, which background process is responsible for releasing the locks held by the user?
12. What is a dirty buffer?
13. If you are updating one row in a table using the ROWID in the WHERE clause (assume that the row is not already in the buffer cache), what will be the minimum amount of information read to the database buffer cache?
14. What happens next when a server process is not able to find enough free buffers to copy the blocks from disk?
15. Which memory structures are shared? Name two.
16. When a SELECT statement is issued, which stage checks the user's privileges?
17. Which memory structure records all database changes made to the instance?
18. What is the minimum number of redo log files required in a database?
19. When are the system change numbers assigned?
20. Name the parts of the database buffer pool.
21. List all the valid database start-up option?
22. Which two values from the V$SESSION view are used to terminate a user session?
23. To use operating system authentication to connect the database as an administrator, what should the value of the parameter REMOTE_LOGIN_PASSWORDFILE be set to?
24. What information is available in the alert log files?
25. Which parameter value is use to set the directory path where the alert log file is written?
26. Which SHUTDOWN option requires instance recovery when the database is started the next time?
27. Which SHUTDOWN option will wait for the users to complete their uncommitted transactions?
28. How do you make a database read-only?
29. Which role is created by default to administer databases?
30. Which parameter in the ORAPWD utility is optional?
31. Which priviledge do you need to connect to the database, if the database is started up by using STARTUP RESTRICT?
32. At which stage of the database start-up is the control file opened?
33. 13. User SCOTT has opened a SQL * Plus session and left for lunch. When you queired the V$SESSION view, the STATUS was INACTVE. You terminated SCOTT's session in V$SESSION?
34. Which command will "bounce" the database-that is, shut down the database and start up the database in a single command?
35. 15. When performing the command SHUTDOWN TRANASACTIONAL, Oracle performs the following tasks in what order?
36. How many panes are there in the Enterprise Manager console?
37. Using SQL*Plus, list two options which show the value of the parameter DB_BLOCK_SIZE?
38. When you issue the command ALTER SYSTEM ENABLE RESTRICTED SESSION, what happens to the users who are connected to the database?
39. Which view has information about users who are ghranted SYSDBA or SYSOPER privilege?
40. Which DB administration tools are included in the DBA Studio Pack?
41. How many control files are required to create a database?
42. Which environment variable or registry entry variable is used to represent the instance name?
43. . What is the recommended configuration for control files?
44. You have specified the LOGFILE clause in the CREATE DATABASE command as follows. What happens if the size of the log file redo0101.log, which already exists, is 10MB?
45. Which command should be issued before you can execute the CREATE DATABASE command?
46. Which initialization parameter cannot be changed after creating the database?
47. What does OFA stand for?
48. When creating a database, where does Oracle find information about the control files that need to be created?
49. Which script creates the data dictionary views?
50. Which prefix for the data dictionary views indicate that the contents of the view belong to the current user?