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lawyer [7]
3 years ago
15

Explain ROLAP, and list the reasons you would recommend its use in the relational database environment.

Engineering
1 answer:
zheka24 [161]3 years ago
6 0

Answer:

ROLAP  is a branch of OLAP that is used to contain Relational database ( RDB ). which is a very fast database ( quick process of queries )

  • Very fast to access and also fast in processing queries
  • provides multidimensional view of data / supports multidimensional database schema with RDBMs
  • supports large databases

Explanation:

ROLAP ( Relational On-line Analytical processing ) is a branch of OLAP that is used to contain Relational database ( RDB ).

<u>Advantages of ROLAP ( reasons for the use of ROLAP )</u>

  • Very fast to access ( fast in processing queries )
  • provides multidimensional view of data / supports multidimensional database schema with RDBMs
  • supports large databases

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How are the particles moving and and arranged in a gas?
alexandr402 [8]

Answer:

The particles in gas do not have any particular arrangement and there are very, very weak forces between them. So, the particles in a gas can easily move around and fill the shape of the container they are in, meaning they have no fixed shape.

7 0
3 years ago
Suppose that the weights for newborn kittens are normally distributed with a mean of 125 grams and a standard deviation of 15 gr
kherson [118]

(a) If a kitten weighs 99 grams at birth, it is at 5.72 percentile of the weight distribution.

(b) For a kitten to be at 90th percentile, the minimum weight is 146.45 g.

<h3>Weight distribution of the kitten</h3>

In a normal distribution curve;

  • 2 standard deviation (2d) below the mean (M), (M - 2d) is at 2%
  • 1 standard deviation (d) below the mean (M), (M - d) is at 16 %
  • 1 standard deviation (d) above the mean (M), (M + d) is at 84%
  • 2 standard deviation (2d) above the mean (M), (M + 2d) is at 98%

M - 2d = 125 g - 2(15g) = 95 g

M - d = 125 g - 15 g = 110 g

95 g is at 2% and 110 g is at 16%

(16% - 2%) = 14%

(110 - 95) = 15 g

14% / 15g = 0.93%/g

From 95 g to 99 g:

99 g - 95 g  = 4 g

4g x 0.93%/g = 3.72%

99 g will be at:

(2% + 3.72%) = 5.72%

Thus, if a kitten weighs 99 grams at birth, it is at 5.72 percentile of the weight distribution.

<h3>Weight of the kitten in the 90th percentile</h3>

M + d = 125 + 15 = 140 g      (at 84%)

M + 2d = 125 + 2(15) = 155 g   ( at 98%)

155 g - 140 g = 15 g

14% / 15g = 0.93%/g

84% + x(0.93%/g) = 90%

84 + 0.93x = 90

0.93x = 6

x = 6.45 g

weight of a kitten in 90th percentile = 140 g + 6.45 g  = 146.45 g

Thus, for a kitten to be at 90th percentile, the approximate weight is 146.45 g

Learn more about standard deviation here: brainly.com/question/475676

#SPJ1

7 0
2 years ago
You should be extra careful during the hours of sunrise, sunset, and nighttime because _____. A. of increased law enforcement ac
torisob [31]

Answer:

B, its the only valid answer

5 0
4 years ago
Tech a says that mass airflow sensors determine mass airflow based on engine speed and manifold pressure. tech b says that some
Westkost [7]

Since Tech B says that some airflow sensors use a hot wire to determine mass airflow he is the only one that is correct.

<h3>How does a mass airflow sensor work?</h3>

An MAF is one that consist of two sensing wires. One is  known to be heated by the use of electrical current, while the other is not.

There are different kinds of wires for different kinds of purposes.

Tech A saying that mass airflow sensors determine mass airflow based on engine speed and manifold pressure is incorrect because that is not the role of the mass airflow sensors.

l

As air flows across the heated wire, it cools down. Hence, Since Tech B says that some airflow sensors use a hot wire to determine mass airflow he is the only one that is correct.

Learn more about airflow sensor  from

brainly.com/question/15188617

#SPJ1

5 0
2 years ago
While at a concert you notice five people in the crowd headed in the same direction. Your tendency to group them is due to? *
Vlada [557]

Answer:

common fate

Explanation:

The gestalt effect may be defined as the ability of our brain to generate the whole forms from the groupings of lines, points, curves and shapes. Gestalt theory lays emphasis on the fact that whole of anything is much greater than the parts.

Some of the principles of Gestalt theory are proximity, similarity, closure, symmetry & order, figure or ground and common fate.

Common fate : According to this principle, people will tend to group things together which are pointed towards or moving in a same direction. It is the perception of the people that objects moving together belongs together.

7 0
3 years ago
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