Give the two types of tables involved in produci

Interview Questions

Give the two types of tables involved in producing a star schema and the type of data they hold.

DATABASE Administrator (DBA) Interview Questions and Answers

14. Give the two types of tables involved in producing a star schema and the type of data they hold.

Fact tables and dimension tables. A fact table contains measurements while dimension tables will contain data that will help describe the fact tables.

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Other Interview Questions

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Give the two types of tables involved in producing a star schema and the type of data they hold.
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Name a tablespace automatically created when you create a database.
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Other way to replace query result null value with a text
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Logical DB Structure
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Online & Offline TS
Schema
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the difference between a soft link and a hard link?
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Explain UNION, MINUS, UNION ALL and INTERSECT?
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What is a pseudo column. Give some examples?
What is difference between CHAR and VARCHAR2?
What do you know about subqueries?
What is a database link?
How to drop the index ?
What are the different types of SQL statements?
What are the uses of rollback segment?
What is a deadlock and Explain?
State any three mouse events system variables?
What other parts of your organization do you interact with and how?
How do you display console on a window?
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What are the different types of joins?
How will you copy the structure of a table without copying the data?
What is a VIEW? How to get script for a view?
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Explain the difference between a hot backup and a cold backup and the benefits associated with each.
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Difference between “ORACLE” and “MICROSOFT ACCESS” databases.
How to remove duplicate records from a table?
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How to run SQL script from a Unix Shell?
Talk about “Exception Handling” in PL/SQL?
Give some examples of Analytical functions
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What is On-line Redo Log?
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What are the steps involved in Database Startup?
What are the steps involved in Instance Recovery?
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You have just had to restore from backup and do not have any control files. How would you go about bringing up this database?
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What is Mirrored on-line Redo Log?
What is Full Backup?
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Can a Tablespace hold objects from different Schemes?
Can objects of the same Schema reside in different tablespaces?
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What is your typical day like?
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Give two examples of how you might determine the structure of the table DEPT.
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What command would you use to create a backup control file?
Give two examples of referential integrity constraints.
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Describe Referential Integrity?
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How do you switch to DOS prompt from SQL prompt?
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What is an Index? - How it is implemented in Oracle Database?
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What is the use of ANALYZE command?
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What is Statement Auditing?
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How can we implement roles?
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Auditing
Audit Trial
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What are the responsibilities of a Database Administrator?
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What is a profile?
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How can we specify the Archived log file name format and destination?
What is user Account in Oracle database?
What dynamic data replication?
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How can you Enforce Referential Integrity in snapshots?
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What is a SNAPSHOT?
What is the mechanism provided by ORACLE for table replication?
What is snapshots?
What are the various type of snapshots?
Describe two phases of Two-phase commit?
What is snapshot log?
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What is an index? How it is implemented in Oracle database?
What are clusters?
What is a cluster key?
How can we reduce the network traffic?
Differentiate simple and complex, snapshots?
What are the Built-ins used for sending Parameters to forms?
Can you have more than one content canvas view attached with a window?
Is the After report trigger fired if the report execution fails?
Does a Before form trigger fire when the parameter form is suppressed?
Is it possible to split the print reviewer into more than one region?
Is it possible to center an object horizontally in a repeating frame that has a variable horizontal size?
How do you list the files in an UNIX directory while also showing hidden files?
How do you execute a UNIX command in the background?
Can a formula column referred to columns in higher group?
Can a formula column be obtained through a select statement?
If a parameter is used in a query without being previously defined, what diff. exist between report 2.0 and 2.5 when the query is applied?
What are the SQL clauses supported in the link property sheet?
What is trigger associated with the timer?
What are the trigger associated with image items?
What are the different windows events activated at runtimes?
When do you use data parameter type?
What is difference between open_form and call_form?
How would you change all occurrences of a value using VI?
Give two UNIX kernel parameters that effect an Oracle install
Briefly, how do you install Oracle software on UNIX.
What is the diff. when confine mode is on and when it is off?
What are visual attributes?
Which of the two views should objects according to possession?
What are the two types of views available in the object navigator (specific to report 2.5)?
What are the vbx controls?
What is the use of transactional triggers?
How do you create a new session while open a new form?
What are the ways to monitor the performance of the report?
If two groups are not linked in the data model editor, What is the hierarchy between them?
An open form can not be execute the call_form procedure if you chain of called forms has been initiated by another open form?
Explain about horizontal, Vertical tool bar canvas views?
What is the purpose of the product order option in the column property sheet?
What is the use of image_zoom built-in?
How do you reference a parameter indirectly?
Is it possible to insert comments into sql statements return in the data model editor?
Is it possible to disable the parameter from while running the report?
When a form is invoked with call_form, Does oracle forms issues a save point?
Can a property clause itself be based on a property clause?
What is a timer?
What are the two phases of block coordination?
What are Most Common types of Complex master-detail relationships?
What is a text list?
What is term?
What is use of term?
What is pop list?
What is the maximum no of chars the parameter can store?
What are the default extensions of the files created by library module?
What are the Coordination Properties in a Master-Detail relationship?
What is an index and How it is implemented in Oracle database?
Lot of users are accessing select sysdate from dual and they getting some millisecond differences. If we execute SELECT SYSDATE FROM EMP; what error will we get. Why?
Give two methods you could use to determine what DDL changes have been made.
What are the types of calculated columns available?
Explain about stacked canvas views?
What are the built_ins used the display the LOV?
What is the difference between SHOW_EDITOR and EDIT_TEXTITEM?
What are the built-ins that are used to Attach an LOV programmatically to an item?
How do you call other Oracle Products from Oracle Forms?
What is the main diff. bet. Reports 2.0 & Reports 2.5?
What are the different file extensions that are created by oracle reports?
What is strip sources generate options?
What is the basic data structure that is required for creating an LOV?
What is the Maximum allowed length of Record group Column?
Which parameter can be used to set read level consistency across multiple queries?
What are the different types of Record Groups?
From which designation is it preferred to send the output to the printed?
what are difference between post database commit and post-form commit?
What are the different display styles of list items?
Which of the above methods is the faster method?
With which function of summary item is the compute at options required?
What are parameters?
What are the three types of user exits available?
How many windows in a form can have console?
If the maximum record retrieved property of the query is set to 10 then a summary value will be calculated?
What are the two repeating frame always associated with matrix object?
What are the master-detail triggers?
What are the different objects that you cannot copy or reference in object groups?
What is an OLE?
Is it possible to modify an external query in a report which contains it?
Does a grouping done for objects in the layout editor affect the grouping done in the data model editor?
Can a repeating frame be created without a data group as a base?
If a break order is set on a column would it affect columns which are under the column?
Is it possible to set a filter condition in a cross product group in matrix reports?
Do user parameters appear in the data modal editor in 2.5?
Can you pass data parameters to forms?
Is it possible to link two groups inside a cross products after the cross products group has been created?
What are the different modals of windows?
What are modal windows?
What are the different default triggers created when Master Deletes Property is set to Non-isolated?
What are the different default triggers created when Master Deletes Property is set to isolated?
What are the different default triggers created when Master Deletes Property is set to Cascade?
What is the diff. bet. setting up of parameters in reports 2.0 reports2.5?
What are the difference between lov & list item?
What is the advantage of the library?
What is lexical reference?
What is system.coordination_operation?
What is synchronize?
What use of command line parameter cmd file?
What is a Text_io Package?
What is forms_DDL?
How is link tool operation different bet. reports 2 & 2.5?
What are the different styles of activation of ole Objects?
How do you reference a Parameter?
What is the difference between object embedding and linking in Oracle forms?
Name of the functions used to get/set canvas properties?
What are the built-ins that are used for setting the LOV properties at runtime?
What are the built-ins used for processing rows?
What are built-ins used for Processing rows?
What are the built-in used for getting cell values?
What are the built-ins used for Getting cell values?
A tleast how many set of data must a data model have before a data model can be base on it?
To execute row from being displayed that still use column in the row which property can be used?
What are different types of modules available in oracle form?
What is the remove on exit property?
What is WHEN-Database-record trigger?
What is a difference between pre-select and pre-query?
What are built-ins associated with timers?
What are the built-ins used for finding object ID functions?
What are the built-ins used for finding Object ID function?
Any attempt to navigate programmatically to disabled form in a call_form stack is allowed?
Use the Add_group_row procedure to add a row to a static record group 1. true or false?
Use the add_group_column function to add a column to record group that was created at a design time?
What are the various sub events a mouse double click event involves?
How can a break order be created on a column in an existing group?
What is the use of place holder column?
What is the use of hidden column?
What is the use of break group?
What is an anchoring object and what is its use?
What are the various sub events a mouse double click event involves?
What are the default parameter that appear at run time in the parameter screen?
What are the built-ins used for Creating and deleting groups?
What are different types of canvas views?
What are the different types of Delete details we can establish in Master-Details?
What is relation between the window and canvas views?
What is a User_exit?
How is it possible to select generate a select set for the query in the query property sheet?
How can values be passed between precompiler exits & Oracle call interface?
How can a square be drawn in the layout editor of the report writer?
How can a text file be attached to a report while creating in the report writer?
How can I message to passed to the user from reports?
How is possible to restrict the user to a list of values while entering values for parameters?
How can a button be used in a report to give a drill down facility?
How can a cross product be created?
What are different types of images?
What is the difference between boiler plat images and image items?
What is bind reference and how can it be created?
What are the triggers available in the reports?
Give the sequence of execution of the various report triggers?
Why is a Where clause faster than a group filter or a format trigger?
Why is it preferable to create a fewer no. of queries in the data model?
Where is the external query executed at the client or the server?
Where is a procedure return in an external pl/SQL library executed at the client or at the server?
What is coordination Event?
What is the difference between OLE Server & OLE Container?
What is an object group?
What is an LOV?
At what point of report execution is the before Report trigger fired?
What are the built -ins used for Modifying a groups structure?
What is an user exit used for?
What is the User-Named Editor?
What are the Built-ins to display the user-named editor?
What is a Static Record Group?
What is a record group?
How many number of columns a record group can have?
What is a Query Record Group?
What is a property clause?
What is a physical page? What is a logical page?
What does the term panel refer to with regarda to pages?
What is a master detail relationship?
What is a library?
How can a group in a cross products be visually distinguished from a group that does not form a cross product?
What is the frame & repeating frame?
What is a combo box?
What are three panes that appear in the run time pl/SQL interpreter?
What are the two panes that Appear in the design time pl/SQL interpreter?
What are the two ways by which data can be generated for a parameters list of values?
What are the various methods of performing a calculation in a report?
What are the default extensions of the files created by menu module?
It is possible to use raw devices as data files and what is the advantages over file system files?
What are disadvantages of having raw devices?
What is the significance of having storage clause?
What is the use of INCTYPE option in EXP command?
What is the use of FILE option in IMP command?
What is a Shared SQL pool?
What is hot backup and how it can be taken?
List the Optional Flexible Architecture (OFA) of Oracle database? How can we organize the tablespaces in Oracle database to have maximum performance?
How to implement the multiple control files for an existing database?
What is advantage of having disk shadowing/ Mirroring?
How will you force database to use particular rollback segment?
Give one method for transferring a table from one schema to another
What is the purpose of the IMPORT option IGNORE? What is it?s default setting?
You have a rollback segment in a version 7.2 database that has expanded beyond optimal, how can it be restored to optimal?
If the DEFAULT and TEMPORARY tablespace clauses are left out of a CREATE USER command what happens? Is this bad or good? Why?
What are some of the Oracle provided packages that DBAs should be aware of?
What happens if the constraint name is left out of a constraint clause?
What happens if a tablespace clause is left off of a primary key constraint clause?
What is the proper method for disabling and re-enabling a primary key constraint?
What happens if a primary key constraint is disabled and then enabled without fully specifying the index clause?
(On UNIX) When should more than one DB writer process be used? How many should be used?
You are using hot backup without being in archivelog mode, can you recover in the event of a failure? Why or why not?
What causes the "snapshot too old" error? How can this be prevented or mitigated?
How can you tell if a database object is invalid?
A user is getting an ORA-00942 error yet you know you have granted them permission on the table, what else should you check?
A developer is trying to create a view and the database won?t let him. He has the "DEVELOPER" role which has the "CREATE VIEW" system privilege and SELECT grants on the tables he is using, what is the problem?
If you have an example table, what is the best way to get sizing data for the production table implementation?
How can you find out how many users are currently logged into the database? How can you find their operating system id?
A user selects from a sequence and gets back two values, his select is:
How can you determine if an index needs to be dropped and rebuilt?
A tablespace has a table with 30 extents in it. Is this bad? Why or why not.
How do you set up tablespaces during an Oracle installation?
You see multiple fragments in the SYSTEM tablespace, what should you check first?
What are some indications that you need to increase the SHARED_POOL_SIZE parameter?
What is the general guideline for sizing db_block_size and db_multi_block_read for an application that does many full table scans?
What is the fastest query method for a table?
Explain the use of TKPROF? What initialization parameter should be turned on to get full TKPROF output?
When looking at v$sysstat you see that sorts (disk) is high. Is this bad or good? If bad -How do you correct it?
When should you increase copy latches? What parameters control copy latches?
Where can you get a list of all initialization parameters for your instance? How about an indication if they are default settings or have been changed?
Describe hit ratio as it pertains to the database buffers. What is the difference between instantaneous and cumulative hit ratio and which should be used for tuning?
Discuss row chaining, how does it happen? How can you reduce it? How do you correct it?
When looking at the estat events report you see that you are getting busy buffer waits. Is this bad? How can you find what is causing it?
If you see contention for library caches how can you fix it?
If you see statistics that deal with "undo" what are they really talking about?
If a tablespace has a default pctincrease of zero what will this cause (in relationship to the smon process)?
If a tablespace shows excessive fragmentation what are some methods to defragment the tablespace? (7.1,7.2 and 7.3 only)
How can you tell if a tablespace has excessive fragmentation?
You see the following on a status report: redo log space requests 23; redo log space wait time 0; Is this something to worry about? What if redo log space wait time is high? How can you fix this?
What can cause a high value for recursive calls? How can this be fixed?
If you see a pin hit ratio of less than 0.8 in the estat library cache report is this a problem? If so, how do you fix it?
If you see the value for reloads is high in the estat library cache report is this a matter for concern?
You look at the dba_rollback_segs view and see that there is a large number of shrinks and they are of relatively small size, is this a problem? How can it be fixed if it is a problem?