Question
Statements: All car are bus. Some bus
are truck. Some truck are train. Some train are bike. Conclusions: I. Some train are bus II. Some car are train. III. Some truck are car. IV. All bus are car. In each question below are given some statements followed by four conclusions numbered I, II, III and IV are given. You have to take the three given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the four given statements, disregarding commonly known facts.Solution
Some bus are truck(I) + Some truck are train(I) ⇒ No conclusion. Hence conclusion I does not follow. All car are bus(A) + Some bus are truck(I) ⇒ No conclusion. Hence conclusion II and III does not follow. All car are bus(A) ⇒ Conversion ⇒ Some bus are car(I). Hence conclusion IV does not follow.
Which of the following best describes the primary function of a database index?
In a snowflake schema of a data warehouse, which of the following consequences is most likely as a result of normalization of dimension tables?
In a data warehouse, a fact table typically contains:
Which OLAP operation rotates the data axes to provide an alternative presentation?
Which of the following is NOT a characteristic of OLAP systems?
A surrogate key is:
Which OLAP operation summarizes data along a dimension?
Which type of OLAP allows operations on pre-aggregated data cubes?
Which of the following best describes a Data Warehouse?
Which type of OLAP allows analysis of multidimensional data stored in relational databases?