GATE DA 2026 Set 1 — Question 18

MCQ+1 / -0.33EasyOLAP OperationsData WarehousingDatabase Management & Warehousing

Database Management & Warehousing → Data Warehousing → OLAP Operations

Last updated 5 September 2026

Question

Consider that the visualization of a 3-dimensional data cube is showing Sales Quantity for each combination of the attributes Product Type, Month and Country . From this, if we want to further visualize the Sales Quantity for each combination of Product Type, Month and State, which of the following OLAP operations should be performed?

Correct answer (D) Drill-down Solution In OLAP (Online Analytical Processing): Drill-down is the operation of moving from summary data to more detailed data (e.g., from Country to State, or Year to Month). Roll-up is the reverse, moving from detailed data to summary data (e.g., State to Country). Slicing selects a single value for one dimension (reducing dimensionality). Dicing selects a sub-cube by specifying ranges on multiple dimensions. The question describes moving from Country level to State level. Since State is a more granular (detailed) level than Country within the location hierarchy, this operation is a Drill-down . Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (D) Drill-down Solution In OLAP (Online Analytical Processing): Drill-down is the operation of moving from summary data to more detailed data (e.g., from Country to State, or Year to Month). Roll-up is the reverse, moving from detailed data to summary data (e.g., State to Country). Slicing selects a single value for one dimension (reducing dimensionality). Dicing selects a sub-cube by specifying ranges on multiple dimensions. The question describes moving from Country level to State level. Since State is a more granular (detailed) level than Country within the location hierarchy, this operation is a Drill-down .

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