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Sever21 [200]
3 years ago
14

How do keystroke dynamics determine whether to authenticate an individual or not?

Computers and Technology
1 answer:
inysia [295]3 years ago
5 0
<span>Keystroke dynamics determine whether to authenticate an individual or not w</span>ith dwell and flight time.  <span>Dwell time (the time a key pressed) and Flight time (the time between "key up" and the next "key down") . These keystroke dynamics prevent online fraud.</span>
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How to make classs constructer java.
ladessa [460]

Answer:

A constructor doesn't have a return type.

The name of the constructor must be the same as the name of the class.

Unlike methods, constructors are not considered to be members of a class.  

A constructor is called when a new instance of an object is created.

Explanation:

4 0
2 years ago
How operands are fetched from or stored into memory using different ways?
Mila [183]
<span>The operand is part of the instruction and is fetched from code memory following the instruction opcode.
</span><span>The value is stored in memory, and the specific address is held in a register</span>
6 0
3 years ago
You are a website designer for a travel website. You have to design an enchanting website. The website should be interactive. Me
levacccp [35]

Answer:

the graphics are lilttle images inside

Explanation:

6 0
3 years ago
What does government office means?​
german

Answer:

   1.    a building or set of rooms in which the business of a department of government administration is carried out.

   "The government offices were dispersed throughout the city"

   2.  a post or position within a country's government.

   "he cannot be the city attorney because he already holds a government office"

Explanation:

4 0
2 years ago
In this task, you will perform normalization on a crude table so that it could be stored as a relational database.
ryzh [129]

Answer:

Check the explanation

Explanation:

(1.) The functional dependencies based on assumptions are as follows:-

Trip determines which staff was there in the trip, the car used for the trip, the quantity of fuel used in the trip, the fill up time and the total paid of the trip.

Service station refers to its address

Car details consist of the details of license plate, odometer reading and the fuel type used in the car

fuel type and the fill up time will help to determine the cost of the fuel at that time

cost of the fuel and the quantity of fuel used will determine the total paid

From the above assumptions the functional dependencies are as follows:-

Trip ID -> Staff Name, Car Details, Service Station, Quantity, Fill Up Time, Total Paid

Service Station -> Station Address,

Car Details -> License Plate, Odometer reading, Fuel Type

Fuel Type, Fill up Time -> Cost per litre

Cost per Litre, Quantity -> Total Paid

(2.) Initially the relation is as follows:-

R (Trip ID, Staff Name, Car Details, License Plate, Odometer Reading, Service Station, Station Address, Fill up Time, Fuel type, Quantity, Cost per Litre, Total Paid)

For 1 NF there should not be composite attributes,in the above relation Staff Name and Station Address are composite attributes therefore it will be decomposed as follows:-

R (Trip ID, Staff First Name,Staff Last Name, Car Details, License Plate, Odometer Reading, Service Station, Street, City, State, Zip Code, Fill up Time, Fuel type, Quantity, Cost per Litre, Total Paid)

For 2 NF there should not be partial dependency that is non prime attribute should not dependent upon any 1 prime attribute of candidate key, since in the given relation there is only 1 candidate key which is only Trip ID, therefore the relation is already in 2 NF.

For 3 NF there should not be transitive dependency that is non prime attribute should not dependent upon the other non prime attribute, if it is present then the relation will be decomposed into sub relations, the given relation is not in 3 NF therefore it will be decomposed as follows:-

R1 (Trip ID, Staff First Name, Staff Last Name, Car Details, Service Station, Quantity, Fill up time, Total paid)

R2 (Service Station, Street, City, State, Zip Code)

R3 (Car Details, License Plate, Odometer reading, Fuel Type)

R4 (Fuel Type, Fill up Time, Cost per litre)

R5 (Cost per Litre, Quantity, Total Paid)

(3.) After the 3 NF we add the primary and foreign key constraints as follows:-

R1 (Trip ID, Staff First Name, Staff Last Name, Car Details, Service Station, Quantity, Fill up time, Total paid)

R2 (Service Station, Street, City, State, Zip Code)

R3 (Car Details, License Plate, Odometer reading, Fuel Type)

R4 (Fuel Type, Fill up Time, Cost per litre)

R5 (Cost per Litre, Quantity, Total Paid)

In the above relational schema the primary keys are represented with bold and foreign keys by italic

(4.) The ER diagram of the above relational schema using crow's foot notation are as shown in the attached image below:-

5 0
3 years ago
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