Database Management Systems Mcqs

Page No. 16

In rank() function if one value is shared by two tuples then


aThe rank order continues as counting numbers

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bThe rank order continues by leaving one rank in the middle

✓


cThe user specifies the order

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dThe order does not change

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Ranking of queries is done by which of the following?


aGroup by

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bOrder by

✓


cHaving

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dBoth Group by and Order by

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View Answer Order by

Any recursive view must be defined as the union of two subqueries: a _______ query that is nonrecursive and a __________ query.


aBase, recursive

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bRecursive, Base

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cBase, Redundant

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dView, Base

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View Answer Base, recursive

Which one of the following is the right syntax for DECODE?


aDECODE (search, expression, result [, search, result]… [, default])

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bDECODE (expression, result [, search, result]… [, default], search)

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cDECODE (search, result [, search, result]… [, default], expression)

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dDECODE (expression, search, result [, search, result]… [, default])

✓



What do data warehouses support?


aOLAP

✓


bOLTP

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cOLAP and OLTP

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dOperational databases

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View Answer OLAP

In SQL the cross-tabs are created using


aSlice

✓


bDice

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cPivot

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dAll of the mentioned

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View Answer Slice

The operation of moving from finer-granularity data to a coarser granularity (by means of aggregation) is called a ________


aRollup

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bDrill down

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cDicing

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dPivoting

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View Answer Rollup

The process of viewing the cross-tab (Single dimensional) with a fixed value of one attribute is


aSlicing

✓


bDicing

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cPivoting

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dBoth Slicing and Dicing

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View Answer Slicing

The generalization of cross-tab which is represented visually is ____________ which is also called as data cube.


aTwo dimensional cube

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bMultidimensional cube

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cN-dimensional cube

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dCuboid

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View Answer Two dimensional cube

Data that can be modeled as dimension attributes and measure attributes are called _______ data.


aMultidimensional

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bSingledimensional

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cMeasured

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dDimensional

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View Answer Multidimensional

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