What are the various types of RollBack Segments ?

1 Answer

Answer :

Public Available to all instances
Private Available to specific instance

Related questions

Description : Can you Rollback to any savepoint ?

Last Answer : Yes.

Description : An insert statement followed by a create table statement followed by rollback ? Will the rows be inserted ?

Last Answer : No.

Description : What are the states of a rollback segment ? What is the difference between partly available and needs recovery ?

Last Answer : The various states of a rollback segment are : ONLINE, OFFLINE, PARTLY AVAILABLE, NEEDS RECOVERY and INVALID.

Description : What are the min. extents allocated to a rollback extent ?

Last Answer : Two

Description : What is Rollback Segment?

Last Answer : A Database contains one or more Rollback Segments to temporarily store “undo” information.

Description : What are the different type of Segments?

Last Answer : Data Segment, Index Segment, Rollback Segment and Temporary Segment.

Description : What are the various types of database triggers ?

Last Answer : There are 12 types of triggers, they are combination of : Insert, Delete and Update Triggers. Before and After Triggers. Row and Statement Triggers. (3*2*2=12)

Description : What are the various types of parameter modes in a procedure ?

Last Answer : IN, OUT AND INOUT.

Description : What are the various types of Exceptions ?

Last Answer : User defined and Predefined Exceptions.

Description : How will you create multiple rollback segments in a database ?

Last Answer : Create a database which implicitly creates a SYSTEM Rollback Segment in a SYSTEM tablespace. Create a Second Rollback Segment name R0 in the SYSTEM tablespace. Make new rollback segment ... ) for rollback segments. Deactivate Rollback Segment R0 and activate the newly created rollback segments.

Description : I've lost some Rollback Segments, how can I get my DB back? (for DBA

Last Answer : Re-start your database with the following INIT.ORA parameter if one of your rollback segments is corrupted. You can then drop the corrupted rollback segments and create it from scratch. ... Please contact Oracle Support before using it. _Corrupted_rollback_segments = (rbs01, rbs01, rbs03, rbs04)

Description : In SQL, the CREATE TABLESPACE isused A. to createa place in the databasefor storageof scheme objects, rollback segments, andnaming the data files to comprise the tablespace B. to createa database trigger C. to add/rename data files, to change storage D. All of theabove E. None of the above

Last Answer : to createa place in the databasefor storageof scheme objects, rollback segments, andnaming the data files to comprise the tablespace

Description : What are different types of column in reports?

Last Answer : There are three types of columns in the report 6i these are: 1) Placeholder Column – Placeholder column is used to store a value for a variable. 2) Formula Column 3) Summary Column

Description : How many types of columns are there and what are they

Last Answer : Formula columns: For doing mathematical calculations and returning one value Summary Columns: For doing summary calculations such as summations etc. Place holder Columns: These columns are useful for storing the value in a variable

Description : How many rows will the following SQL return

Last Answer : Select * from emp Where rownum < 10; 9 rows.

Description : Can you use %RowCount as a parameter to a cursor

Last Answer : Yes

Description : Can you pass a parameter to a cursor ?

Last Answer : Explicit cursors can take parameters, as the example below shows. A cursor parameter can appear in a query wherever a constant can appear. CURSOR c1 (median IN NUMBER) IS SELECT job, ename FROM emp WHERE sal > median

Description : What is the significance of the & and && operators in PL SQL ?

Last Answer : The & operator means that the PL SQL block requires user input for a variable. The && operator means that the value of this variable should be the same as inputted by the user previously ... span across different rollback segments or will it terminate ? It will terminate (Please check ).

Description : What is the maximum no. of columns a table can have ?

Last Answer : 254.

Description : Can you define multiple savepoints ?

Last Answer : Yes.

Description : What is the difference between unique key and primary key ?

Last Answer : Unique key can be null; Primary key cannot be null.

Description : Can Check constraint be used for self referential integrity ? How ?

Last Answer : ? Yes. In the CHECK condition for a column of a table, we can reference some other column of the same table and thus enforce self referential integrity.

Description : Can null keys be entered in cluster index, normal index ?

Last Answer : Yes.

Description : Can Long/Long RAW be clustered ?

Last Answer : No.

Description : What are the disadvantages of clusters ?

Last Answer : The time for Insert increases.

Description : What are the advantages of clusters ?

Last Answer : Access time reduced for joins.

Description : What is the use of Data Dictionary ?

Last Answer : Used by Oracle to store information about various physical and logical Oracle structures e.g. Tables, Tablespaces, datafiles, et

Description : What is the use of Control files ?

Last Answer : Contains pointers to locations of various data files, redo log files, etc.

Description : Can you increase the size of datafiles ? How ?

Last Answer : No (for Oracle 7.0)

Description : Can you increase the size of a tablespace ? How ?

Last Answer : Yes, by adding datafiles to it.

Description : Describe Oracle database's physical and logical structure

Last Answer : Physical : Data files, Redo Log files, Control file. Logical : Tables, Views, Tablespaces, etc.

Description : What are constraining triggers ?

Last Answer : A trigger giving an Insert/Updat e on a table having referential integrity constraint on the triggering table.

Description : What are mutating triggers ?

Last Answer : A trigger giving a SELECT on the table on which the trigger is written.

Description : What are cascading triggers? What is the maximum no of cascading triggers at a time?

Last Answer : When a statement in a trigger body causes another trigger to be fired, the triggers are said to be cascading. Max = 32.

Description : Can views be specified in a trigger statement ?

Last Answer : No

Description : What is the maximum no. of statements that can be specified in a trigger statement?

Last Answer : One.

Description : What is the advantage of a stored procedure over a database trigger ?

Last Answer : We have control over the firing of a stored procedure but we have no control over the firing of a trigger.

Description : What are the parts of a database trigger ?

Last Answer : The parts of a trigger are: A triggering event or statement A trigger restriction A trigger action

Description : Can you pass parameters in packages ? How ?

Last Answer : Yes. You can pass parameters to procedures or functions in a package.

Description : Why Create or Replace and not Drop and recreate procedures ?

Last Answer : So that Grants are not dropped.

Description : What are the constructs of a procedure, function or a package ?

Last Answer : The constructs of a procedure, function or a package are : variables and constants cursors exceptions

Description : Can 2 functions have same name & input parameters but differ only by return datatype

Last Answer : No.

Description : Can functions be overloaded ?

Last Answer : Yes.

Description : What is Over Loading and what are its restrictions ?

Last Answer : OverLoading means an object performing different functions depending upon the no. of parameters or the data type of the parameters passed to it.

Description : Can you call a stored function in the constraint of a table ?

Last Answer : no

Description : Can you have two stored functions with the same name ?

Last Answer : Yes.

Description : Can you have two functions with the same name in a PL/SQL block

Last Answer : Yes.

Description : What is the difference between a procedure and a function ?

Last Answer : Functions return a single variable by value whereas procedures do not return any variable by value. Rather they return multiple variables by passing variables by reference through their OUT parameter

Description : Can we define exceptions twice in same block ?

Last Answer : No.

Description : Can you use select in FROM clause of SQL select ?

Last Answer : Yes.