Database Management Systems Mcqs

Page No. 81

A B-tree of order m has maximum of _____________ children


am


bm+1


cm-1


dm/2


View Answer m

The ______ operator is used to compare a value to a list of literals values that have been specified


aBETWEEN


bANY


cIN


dALL


View Answer BETWEEN

To delete a particular column in a relation the command used is:


aUPDATE


bDROP


cALTER


dDELETE


View Answer ALTER

A Data manipulation command the combines the records from one or more tables is called


aSELECT


bPROJECT


cJOIN


dPRODUCT


View Answer JOIN

Natural join is equal to?


aCartesian Product


bCombination of Union and Cartesian product


cCombination of selection and Cartesian product


dCombination of projection and Cartesian product



_________ is a virtual table that draws its data from the result of an SQL SELECT statement.


aView


bSynonym


cSequence


dTransaction


View Answer View

In E-R diagram generalization is represented by


aEllipse


bDashed ellipse


cRectangle


dTriangle


View Answer Triangle

Hierarchical model is also called


aTree structure


bPlex Structure


cNormalize Structure


dTable Structure


View Answer Tree structure

In E-R Diagram relationship type is represented by


aEllipse


bDashed ellipse


cRectangle


dDiamond


View Answer Diamond

A primary key if combined with a foreign key creates


aParent-Child relationship between the tables that connect them.


bMany to many relationship between the tables that connect them.


cNetwork model between the tables that connect them.


dNone of the above.



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