Database Administration Questions

Q:

What are the built-ins used for finding Object ID function?

Answer

FIND_GROUP(function) FIND_COLUMN(function)

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Q:

In a database table, the category of information is called

A) Record B) Field
C) Tuple D) None of the above
 
Answer & Explanation Answer: B) Field

Explanation:

In a database table, the category of information is called Field.

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Q:

What is relation between the window and canvas views?

Answer

Canvas views are the back ground objects on which you place the interface items (Text items), check boxes, radio groups etc.,) and boilerplate objects (boxes, lines, images etc.,) that operators interact with us they run your form . Each canvas views displayed in a window.

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Q:

What is BCP ? When is it used ?

Answer

The Bulk Copy Program (BCP) is a command-line utility that ships with Microsoft SQL Server. It is a tool used to duplicate enormous quantity of information from tables and views. It does not facsimile the structures same as foundation to target.
BULK INSERT command helps to bring in a data folder into a record, table or view in a user-specific arrangement. With BCP, you can import and export large amounts of data in and out of SQL Server databases quickly and easily. Any DBA who has utilized this functionality will agree that BCP is an essential tool.

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Q:

What is user Account in Oracle database?

Answer

An user account is not a physical structure in Database but it is having important relationship to the objects in the database and will be having certain privileges. 95. When will the data in the snapshot log be used? - We must be able to create a after row trigger on table (i.e., it should be not be already available) After giving table privileges. We cannot specify snapshot log name because oracle uses the name of the master table in the name of the database objects that support its snapshot log. The master table name should be less than or equal to 23 characters. (The table name created will be MLOGS_tablename, and trigger name will be TLOGS name).

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Q:

How would you go about increasing the buffer cache hit ratio?

Answer

Use the buffer cache advisory over a given workload and then query the v$db_cache_advice table. If a change was necessary then I would use the alter system set db_cache_size command.

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Q:

What is a DBA?

Answer

A DBA is a Database Administrator, and this is the most common job that you find a database specialist doing. There are Development DBAs and Production DBAs.


- A Development DBA usually works closely with a team of developers and gets more involved in design decisions, giving advice on performance and writing good SQL.


  That can be satisfying at a human level because you are part of a team and you share the satisfaction of the teams accomplishments.


- A Production DBA (on the other hand) is responsible for maintaining Databases within an organization, so it is a very difficult and demanding job. He or she, often gets involved when all the design decisions have been made, and has simply to keep things up and running.


  Therefore, of course, it is also a rewarding job, both financially and in terms of job satisfaction. But it is a more "lonely" job than being a Development DBA.


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Q:

How can you enable a trace for a session?

Answer

Use the DBMS_SESSION.SET_SQL_TRACE or


Use ALTER SESSION SET SQL_TRACE = TRUE;

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