Question
The current ages of R, S, and T are in the ratio 2:3:6. The
difference between the ages of R and T is 40 years. After ‘m’ years, age of S will be 50% more than R’s age. Find the value of ‘m’.Solution
ATQ,
Let present ages of R, S and T be 2x, 3x and 6x years respectively.
ATQ,
6x - 2x = 40
=> x = 10
Present age of R = 2x = 2 × 10 = 20 years
Present age of S = 3x = 3 × 10 = 30 years
ATQ,
(20 + m) × 1.5 = (30 + m)
30 + 1.5m = 30 + m
=> 1.5m - m = 0
=> 0.5m = 0
=> m = 0
Which OLAP operation involves focusing on a subset of dimensions (e.g., region=‘Asia’)?
Which OLAP operation summarizes data along a dimension?
A snowflake schema differs from a star schema mainly because:
Which of the following is a key process in ETL?
Which schema in data warehousing uses a central fact table connected to dimension tables?
What is meant by 'cardinality' in data modeling?
ETL stands for:
Data cleansing is primarily concerned with:
Which process loads data from multiple sources into a data warehouse?
Data warehouse metadata primarily describes:
