a2zinterviews

9.	What is the difference between multithreaded/shared server and dedicated server?
	In case of a dedicated server, a server process is associated with a single user process and serves it dedicatedly. In case of a shared server, a single server process can serve multiple user processes. This is achieved with the help of a dispatcher process, which places each process in a single request queue. Server process picks up the user process whenever it is free. After that, the server process puts the result in the individual response queue associated with different dispatcher processes.
	Discuss Your Name Your Email-ID Your Answer

10.	What is the difference between SPFILE and PFILE?
	Oracle can use both SPFILE and PFILE as initialization parameter files. SPFILE is a binary file while PFILE is a text file. You can change the values in PFILE by directly editing it but those changes would not take effect until the restart of the database. Whereas, you have to use Oracle statements to change the values in SPFILE and these changes can be incorporated dynamically in a running database.
	Discuss Your Name Your Email-ID Your Answer

11.	Name a tablespace, which is automatically created when you create a database?
	The SYSTEM tablespace is created automatically during database creation. It contains data dictionary objects. All data stored on behalf of stored PL/SQL program units (procedures, functions, packages and triggers) resides in the SYSTEM tablespace, which is always online when the database is open.
	Discuss Your Name Your Email-ID Your Answer

12.	Which file is accessed when you start an Oracle database?
	Initialization parameter file or SPFILE is always accessed first when an Oracle database is started. This file is used to determine database level setting because those values are stored as parameters in this file.
	Discuss Your Name Your Email-ID Your Answer