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3 years ago

Database management systems are expected to handle binary relationships but not unary and ternary relationships.'

Computers and Technology

1 answer:

alekssr [168]3 years ago

6 0

Answer:

False

Database management systems are expected to handle binary, unary and ternary relationships.

Explanation:

Unary Relationship: It is a recursive relationship which includes one entity in a relationship which means that there is a relationship between the instances of the same entity. Primary key and foreign key are both the same here. For example a Person is married to only one Person. In this example there is a one-to-one relationship between the same entity i.e. Person.

Binary Relationships: It is a relationship involving two different entities. These two entities identified using two relations and another relation to show relationship between two entities and this relation holds primary keys of both entities and its own primary key is the combination of primary keys of the both relations of the two entities. For example Many Students can read a Book and many Books can be obtained by a Student.

Ternary Relationships: is a relationship involving three entities and can have three tables. For example a Supplier can supply a specific Part of many Mobiles. Or many Suppliers may supply several Parts of many Mobile models.

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Summarize who you believe cyber criminals are, and why?

sergij07 [2.7K]

Answer:

The cyber criminals are the people that are engaged with getting the data in an unapproved way and furthermore mischief to the association henceforth are considered as cyber criminals.

Cyber criminals are people or groups of individuals who use innovation to committed the malicious exercises on computerized frameworks or systems with the aim of taking the organization data or individual information and producing benefit.

There are many types of cyber criminals that are:

Internet stalkers
Cyber terrorist
Identity thieves

5 0

3 years ago

g What field in the IPv4 datagram header can be used to ensure that a packet is forwarded through no more than N routers? When a

ad-work [718]

Answer:

a) Time to live field

b) Destination

c) Yes, they have two ip addresses.

d) 128 bits

e) 32 hexadecimal digits

Explanation:

a) the time to live field (TTL) indicates how long a packet can survive in a network and whether the packet should be discarded. The TTL is filled to limit the number of packets passing through N routers.

b) When a large datagram is fragmented into multiple smaller datagrams, they are reassembled at the destination into a single large datagram before beung passed to the next layer.

c) Yes, each router has a unique IP address that can be used to identify it. Each router has two IP addresses, each assigned to the wide area network interface and the local area network interface.

d) IPv6 addresses are represented by eight our characters hexadecimal numbers. Each hexadecimal number have 16 bits making a total of 128 bits (8 × 16)

e) IPv6 address has 32 hexadecimal digits with 4 bits/hex digit

4 0

3 years ago

Matlab In this assignment you will write a function that will calculate parallel resistance for up to 10 parallel resistors. Cal

Ket [755]

Answer:

The complete Matlab code along with step by step explanation is provided below.

Matlab Code:

function Req=ParallelR(Number)

Number=input('Please enter the number of resistors: ');

if Number>10 | Number<=0

disp('Invalid input')

return

end

R=0;

for i=1:Number

r=input('Please enter the value of resistor: ');

R=R+1/r;

end

Req=1/R;

end

Explanation:

Parallel resistance is given by

$\frac{1}{Req} = \frac{1}{R_{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}}...+\frac{1}{R_{N}}$

First we get the input from the user for how many parallel resistors he want to calculate the resistance.

Then we check whether the user has entered correct number of resistors or not that is from 1 to 10 inclusive.

Then we run a for loop to get the resistance values of individual resistors.

Then we calculated the parallel resistance and keep on adding the resistance for N number of resistors.

Output:

Test 1:

Please enter the number of resistors: 3

Please enter the value of resistor: 10

Please enter the value of resistor: 20

Please enter the value of resistor: 30

ans = 60/11

Test 2:

Please enter the number of resistors: 11

Invalid input

Test 3:

Please enter the number of resistors: 0

Invalid input

8 0

3 years ago

Vocabulary and Bridge Information

motikmotik

Umm
This is to bunch of questions..

6 0

3 years ago

What has a code that is freely available for use or modification?

liq [111]

Answer:

Open source software

Explanation:

Open source software is exactly what you think it is, the code to compile the software and run it is available to the public for use or modification.

6 0

3 years ago