OLAP MCQ Questions & Answers

OLAP MCQs : This section focuses on "OLAP" of Data Warehousing. These Multiple Choice Questions (MCQs) should be practiced to improve the Data Warehousing skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.

1. OLAP stands for?

A. Offline Analytical Processing Server
B. Online Analysts Processing Server
C. Online Access Processing Server
D. Online Analytical Processing Server

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2. OLAP based on?

A. one dimensional data model
B. two dimensional data model
C. multidimensional data model
D. All of the above

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3. How many types of OLAP servers?

A. 1
B. 2
C. 3
D. 4

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4. _________ uses array-based multidimensional storage engines for multidimensional views of data.

A. KOLAP
B. MOLAP
C. ROLAP
D. ZOLAP

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5. ROLAP servers are placed between relational back-end server and client front-end tools

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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6. Which of the following is false about OLAP?

A. Involves historical processing of information
B. Useful in analyzing the business
C. Number or users is in millions
D. Number of records accessed is in millions

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7. The pivot operation is also known as?

A. dice
B. rotation
C. roll up
D. None of the above

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

A. Two dimensional cube
B. Multidimensional cube
C. N-dimensional cube
D. Cuboid

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

A. Pivoting
B. Dicing
C. Slicing
D. Roll up

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10. Roll-up performs aggregation on a data cube.

A. Yes
B. No
C. Can be yes or no
D. Can not say

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