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Bezzdna [24]
3 years ago
14

What is the Dock?

Computers and Technology
1 answer:
Umnica [9.8K]3 years ago
3 0
The place where most commonly used applications reside
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What is a characteristic of a wan hub-and-spoke topology?
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When an object reflects all the light which falls on it it's color will be
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When the writer of a letter sends a copy to a third party without the knowledge of the person receiving the original letter, it
ahrayia [7]

The answer here is Blind carbon copy (bcc).

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3 years ago
Which of the follow is the best technique to determine how many menu items are needed and how to structure the menus and sub men
AnnZ [28]

Answer:

c. ​Group use cases by actor.

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A use case is used to describe interaction between systems and users to achieve a goal. Mostly, a list of possible interaction between the system and the user is identified. The user can be a single person or a group. By using use case, the requirement of a systems is identified from a users point of view.

8 0
3 years ago
Normalize the following relation:
lora16 [44]

Answer:

Hi Riahroo! This is a good question on the concept of relational databases.

We can normalize the relations as follows:

Flight

(flightnumber (unique), flighttime, airline_id, departure_city, arrival_city,  passenger_id, pilot_id, airplane_id)

has_one_and_belongs_to :airline

has_many :passengers

has_one :pilot

Itinerary(passenger_id, flight_id)

Belongs_to  

Passenger_details  

(passengername (unique), gender, date_of_birth)

has_many :flights

Pilot

(pilotname (unique), gender, date_of_birth)

has_many :flights

airline(airlinename)

airplane(planeID, type, seats))

Explanation:

To normalize a relation, we have to remove any redundancies from the relationships between database objects/tables and simplify the structure. This also means simplifying many-to-many relationships. In this question, we see there is a many-to-many relationship between flights and passengers. To resolve this we can introduce a join table which simplifies this relationship to a one-to-many between the objects.  

5 0
3 years ago
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