Question
In the question below is given a statement followed by
two assumptions numbered I and II. You have to consider the statement and the following assumptions and decide which of the assumptions is implicit in the statement. Statement: "To reduce energy consumption, all office lights will automatically switch off after 9 p.m." Assumptions: I. Some employees may forget to switch off the lights before leaving. II. Automatically switching off lights can help in reducing energy consumption.Solution
Assumption I is implicit because the rule introduces an automatic system, which suggests that relying on employees to manually switch off lights may not be effective. Assumption II is implicit because the stated purpose is "to reduce energy consumption," which presumes that automatic switching-off will indeed achieve that goal. Thus, both assumptions are implicit.
'Data modelling' means:
In a data warehouse, a fact table typically contains:
In a data cube, what does "slice" operation do?
Which OLAP operation involves focusing on a subset of dimensions (e.g., region=βAsiaβ)?
Which OLAP operation allows drilling down into more detailed data?
Which of the following is a key process in ETL?
Which type of data warehouse is focused on specific business lines or departments?
Which type of OLAP allows analysis of multidimensional data stored in relational databases?
A star schema in a data warehouse consists of:
Which OLAP operation allows users to view data at different levels of granularity?