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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