Hexaware Technologies Most Frequently Asked Latest Oracle Interview Questions Answers
What Is Oracle 11g?
Oracle 11g is a version of the Oracle Database. The g stands for "grid" to indicate that 11g is "grid-computing ready".
What Is An Extent?
An extent is a specific number of contiguous data blocks, obtained in a single allocation and used to store a specific type of information.
What Is Index Cluster?
A cluster with an index on the cluster key.
What Is Cluster Key?
The related columns of the tables in a cluster are called the cluster key.
How Are The Index Updates?
Indexes are automatically maintained and used by Oracle. Changes to table data are automatically incorporated into all relevant indexes.
What Is An Oracle Index?
An index is an optional structure associated with a table to have direct access to rows, which can be created to increase the performance of data retrieval. Index can be created on one or more columns of a table.
When A Query Is Sent To The Database And An Index Is Not Being Used, What Type Of Execution Is Taking Place?
A table scan.
What Is The Maximum Number Of Triggers, Can Apply To A Single Table?
12 triggers.
What Is The Output Of Sign Function?
1 for positive value,
0 for Zero,
-1 for Negative value.
What Are The More Common Pseudo-columns?
SYSDATE, USER , UID, CURVAL, NEXTVAL, ROWID, ROWNUM
What Are Pl/sql Cursor Exceptions?
Cursor_Already_Open, Invalid_Cursor
Any Three Pl/sql Exceptions?
Too_many_rows,
No_Data_Found,
Value_Error,
Zero_Error,
Others
To See Current User Name
Sql> show user;
If A View On A Single Base Table Is Manipulated Will The Changes Be Reflected On The Base Table?
If changes are made to the tables and these tables are the base tables of a view, then the changes will be reference on the view.
Can A View Be Updated/inserted/deleted? If Yes - Under What Conditions?
A View can be updated/deleted/inserted if it has only one base table if the view is based on columns from one or more tables then insert, update and delete is not possible.
What Is Oracle 11g?
Oracle 11g is a version of the Oracle Database. The g stands for "grid" to indicate that 11g is "grid-computing ready".
What Is An Extent?
An extent is a specific number of contiguous data blocks, obtained in a single allocation and used to store a specific type of information.
A cluster with an index on the cluster key.
What Is Cluster Key?
The related columns of the tables in a cluster are called the cluster key.
How Are The Index Updates?
Indexes are automatically maintained and used by Oracle. Changes to table data are automatically incorporated into all relevant indexes.
What Is An Oracle Index?
When A Query Is Sent To The Database And An Index Is Not Being Used, What Type Of Execution Is Taking Place?
A table scan.
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| Hexaware Technologies Most Frequently Asked Latest Oracle Interview Questions Answers |
What Is The Maximum Number Of Triggers, Can Apply To A Single Table?
12 triggers.
What Is The Output Of Sign Function?
1 for positive value,
0 for Zero,
-1 for Negative value.
What Are The More Common Pseudo-columns?
SYSDATE, USER , UID, CURVAL, NEXTVAL, ROWID, ROWNUM
What Are Pl/sql Cursor Exceptions?
Cursor_Already_Open, Invalid_Cursor
Any Three Pl/sql Exceptions?
Too_many_rows,
No_Data_Found,
Value_Error,
Zero_Error,
Others
To See Current User Name
Sql> show user;
If A View On A Single Base Table Is Manipulated Will The Changes Be Reflected On The Base Table?
If changes are made to the tables and these tables are the base tables of a view, then the changes will be reference on the view.
Can A View Be Updated/inserted/deleted? If Yes - Under What Conditions?
A View can be updated/deleted/inserted if it has only one base table if the view is based on columns from one or more tables then insert, update and delete is not possible.
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