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. What is the most challen!in! aspect of your "ob?

This *uestion will give you clues about the mindset of the DBA. !hen asked what is

challenging about the DBA +ob, the DBA=s answer will reveal a great deal about his or

her personality and ability to work well with other people. The DBA who talks about the

technical challenges of the +ob and difficulties administering and maintaining the

database may not be ideally suited for a position where contact for the development staffis critical. )n the other hand, the DBA who speaks openly of the challenges associated

with getting the developers fast answers and accurate information might be a better

consideration.

#. $ow do you perceive the relationship between the DBA and the

development staff?

DBAs by virtue of their high pay and product>specific knowledge, tend to think of

developers as underlings, in some cases, DBAs view developers with outright contempt,

believing their *ueries to be naive. )n the other hand, DBAs with the proper attitude will

respond to this *uestion by talking about the developers as clients to whom they provide

data services essential to the application. (n some shops, the DBAs may be responsible

for code, reviewing S?1 *ueries, or DM1 statements written by developers' so, a good

relationship is vital.

%. What is a Database instance?#plain A database instance "Server$ is a set of memory structure and background

processes that access a set of database files. The process can be shared by all users.

The memory structure that are used to store most *ueried data from database. This

helps up to improve database performance by decreasing the amount of (%) performed

against data file.

&. What are mandatory bac'!round processes in Oracle Database?Smon, pmon, ckpt, dbwr, lgwr

(. What is Oltp database?

)1T means )nline Transaction rocessing. )1A means )nline Analytical

rocessing. )1T deals with processing of data from transactional systems. 8or

e#ample, an application that loads the reservation data of a hotel is an )1T system. An

)1T system is designed mainly keeping in the mind the performance of the end

application. (t comprises of the application, database @ the reporting system that directly

works on this database. The database in an )1T system would be designed in a

manner as to facilitate the improvement in the application efficiency thereby reducing the

processing time of the application.

). What is Olap database?

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)1A systems were mainly developed using data in a warehouse. :aving said that aneed was felt to isolate older data, it was necessary to store them in a format that wouldbe useful in easing out the reporting bottlenecks. A need was felt to isolate the data @redesign the application data to such a format @ structure that this data repository wouldbe the prime source of business decisions. -oming back to )1A systems, thesesystems were mainly developed on the isolated data.