All categories

2 years ago

An attribute whose value uniquely identifies an object is called a(n) _______.

1 answer:

6 0

This is called a key attribute!

There are different types of key attributes!

Primary key is the key that is actually chosen, for example a social security number.

There is also a unique key, say our finger prints! they also uniquely identify humans, but usually we prefer to use social security number when we list people (a unique key could be a primary key if we chose so)

We could also identify people by their social security number and a name, but this is unnecessary, as social security number already gives a full identification. Such a reduntant key is called super key.

You might be interested in

When you send an email how many computers does it go to

Xelga [282]

once you have sent the email it will only go to the server which then the person receiving it would log on therefore requesting the emails recived.

I'm not 100% sure my answer is classed as correct but I would say it doesn't go to a computer it just gets stored on a server in till requested

4 0

3 years ago

Write the definition of a method twice, which receives an integer parameter and returns an integer that is twice the value of th

Kipish [7]

public static int methodName(int a, int b){
a = a * 2;
b = b * 2;
}
int result = doubling(5, 10);
System.out.println(result);
//result would be 10, 20

5 0

3 years ago

Barricades, vertical panels, drums, and cones in construction zones are known as__________ devices.

Whitepunk [10]

Barricades, vertical panels, drums, and cones in construction zones are known as channelizing devices. They are used in construction and maintenance work areas to notify drivers or passengers of unusual or potentially dangerous conditions in or near work areas.
A barricade is a portable or fixed device having from one to three rails with appropriate markings. It is used to control traffic by closing, restricting, or delineating all or a portion of the right-of-way.Drums are most commonly used to channelize or delineate traffic flow but may also be used singly or in groups to mark specific locations.

6 0

2 years ago

Write a method named square that accepts an integer argument and returns the square of that argument.

BaLLatris [955]

Answer:

The method is as follows:

double square(int num){

return num*num;

}

Explanation:

Written in C++

This first line defines the method

double square(int num){

This line returns the square of num

return num*num;

}

I've added the full program as an attachment where I include the main method

Download cpp

7 0

3 years ago

Regarding the excerpt, what synthesized information helps spread a message to a large audience? Check all that apply. taking adv

frutty [35]

The question is incomplete! Complete question along with answer and step by step explanation is provided below.

Question:

Read the excerpt from News Articles about Bullying.

Aside from his website, Jaylen has appeared on numerous TV networks, chatted via Skype with college education students nationwide and spoken at the Florida Teachers Conference in Orlando in front of more than a thousand educators.

Regarding the excerpt, what synthesized information helps spread a message to a large audience? Check all that apply

1. taking advantage of technology

2. being good at public speaking

3. appearing on a television program

4. speaking mostly to college students

5. presenting at professional conferences

Answer:

The correct options are 1, 2, 3 and 5

Explanation:

In order to convey the message to a large audience, an individual can adopt certain measures that can ensure efficient spread of message.

Jaylen used technology (Skype) to chat with students nationwide, therefore, option 1 is correct.

Speaking in front of more than a thousand educators at the Florida Teacher Conference clearly suggests that Jaylen is good at public speaking, therefore, option 2 is correct.

Jaylen appeared on numerous TV networks as well as she presented at professional conferences which helps in spreading the message across a large audience, therefore, option 3 and 5 are also correct.

It is not necessary to speak to only college students, she can speak to students of all education levels to spread her message to large audience, therefore, option 4 is not correct.

7 0

3 years ago

An attribute whose value uniquely identifies an object is called a(n) _______.​

An attribute whose value uniquely identifies an object is called a(n) _______.