Relational Database Management System Mcqs

Page No. 9

The _______ statement makes the updates performed by the transaction permanent.


aFinalize work

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bFinish work

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cCommit work

✓


dNone of the mentioned

✖


View Answer Commit work

State true or false: We can update a view if it has multiple database relations in the from clause


aTrue

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bFalse

✓


ceither true and false

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dnone of the mentioned

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View Answer False

How can we insert data into a view?


ainsert into ();

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bcreate data values ();

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center ();

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dinsert into values ();

✓



The process of maintaining views up to date is called _________


aView maintenance

✓


bView updating

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cView materialization

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dView isolation

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View Answer View maintenance

If the actual relations used in the view definition change, the view is updated immediately. Such views are called _________


aInstant views

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bInstantaneous views

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cMaterialistic views

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dMaterialized views

✓


View Answer Materialized views

State true or false: One view can be used in the expression defining another view


aTrue

✓


bFalse

✖


ceither true and false

✖


dnone of the mentioned

✖


View Answer True

What is the result of the above query?


a It creates a view named studentdet with 3 attributes

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bIt creates a view named studentdet with 1 attribute

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cIt creates a view named ID with 2 attributes

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d It is syntactically wrong and does not give a result

✓



What is the command used to define view in SQL?


adefine view

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bnew view

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ccreate view

✓


dnone of the mentioned

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View Answer create view

What is a view?


aAn brief description of the schema diagram.

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bA relation that is not a part of the schema but is a virtual relation

✓


cAny relation that is a part of the schema

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dA relation that is a part of the schema but which needs to be specified in every operation made on that particular relation.

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What statement is used to define a new assertion in SQL?


acreate check ;

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bcreate assertion where ;

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ccreate where ;

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dcreate assertion check ;

✓



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