How do you write java

List five ways in which the type declaration system of a language such as Java or C differs from the data definition language us

zhannawk [14.2K]

Answer:

Hi Sevanah! Below are the five main differences between a type declarative language and a data definition language:

A data definition language:

1. define data structure

2. define the column attributes of a table

3. no further classifications

4. The basic commands in a Data Definition language are CREATE, DROP, RENAME, ALTER

5. Scope of variables in data definition languages is limited

A type declarative language:

1. manipulate the data itself

2. uses functions to add and update the rows of a table

3. further classified into procedural and non-procedural languages

4. The basic commands are INSERT, UPDATE and MERGE

5. Scope of variables in type declarative languages is varied

Explanation:

A data definition language is used to define data structures. It makes use of statements such as create table, alter table to create and alter the database schema to allow it to hold rows of information. A type declarative language such as Java or C is used to manipulate the data itself. For example, insert, update and deletion of rows to the database. Whereas data definition languages define the column attributes of a table, a type declaration language uses functions to add and update the rows of a table. A data definition language does not have any further classification, however a type declarative language can be further classified into procedural and non-procedural languages. The basic commands in a Data Definition language are CREATE, DROP, RENAME, ALTER, whereas the basic commands in a type declarative language are INSERT, UPDATE and MERGE. There is little of no scope of variables in a data definition language, whereas the scope of variables in type declarative languages is varied

8 0

3 years ago

Anyone help me with number 41.

Katarina [22]

It is te = t I yhink

8 0

3 years ago

Task 3&4, please with the formula

Anastasy [175]

It’s 12 because 3 times 4 is twelve, hope i helped!

6 0

2 years ago

Create an Automobile class for a dealership. Include fields for an ID number, make, model, color, year, vin number, miles per ga

aliya0001 [1]

Answer:

public class TestAutomobiles {

public static void main(String args[]) {

Automobile obj = new Automobile(1, "Wolkswagen", "Golf", 2007, "GR1GR", 20, 120, "Grey");

System.out.println("Initial Speed: " + obj.getSpeed());

System.out.println("Current Speed with acceleration 100: " + obj.accelerate(100));

System.out.println("Current Speed after using brake : " + obj.brake());

}

class Automobile {

private int idNumber, year, milesPerGallon, speed = 0;

private String model, vinNumber, make, color;

public void setIdNumber(int idNumber){

if (idNumber >= 0 && idNumber <= 9999)

this.idNumber = idNumber;

else this.idNumber = 0;

}

public void setModel(String model){

this.model = model;

}

public void setYear(int year){

if (year >= 2000 && year <= 2017)

this.idNumber = idNumber;

else this.year = 0;

}

public void setVinNumber(String vinNumber){

this.vinNumber = vinNumber;

}

public void setMilesPerGalon(int milesPerGallon){

if (milesPerGallon >= 10 && year <= 60)

this.milesPerGallon = milesPerGallon;

else this.milesPerGallon = 0;

}

public void setSpeed(int speed){

this.speed = speed;

}

public void setMake(String make){

this.make = make;

}

public void setColor(String color){

this.color = color;

}

public int getIdNumber(){return idNumber;}

public String getModel(){return model;}

public int getYear(){return year;}

public String getVinNumber(){return vinNumber;}

public int getMilesPerGallon(){return milesPerGallon;}

public int getSpeed(){return speed;}

public String getMake(){return make;}

public String getColor(){return color;}

public int accelerate() {

setSpeed(speed + 5);

return speed;

}

public int brake() {

setSpeed(speed - 5);

return speed;

}

public int accelerate(int s) {

setSpeed(speed + s);

return speed;

}

public int brake(int s) {

setSpeed(speed - s);

return speed;

}

public Automobile(int idNumber, String make, String model, int year, String vinNumber, int milesPerGallon, int speed, String color){

setIdNumber(idNumber);

setModel(model);

setYear(year);

setVinNumber(vinNumber);

setMilesPerGalon(milesPerGallon);

setSpeed(speed);

setMake(make);

setColor(color);

}

Explanation:

Required variables are declared as private members.

Their setters and getter are created.

Two accelearate and two break methods are created.

One constructor taking all variables as parameter is created.

In the main, I tested a few functions to check if they work properly.

4 0

3 years ago

An online conference room reservation system lets a user reserve rooms. The user is required to enter contact information and re

lisov135 [29]

Answer:b)Reserve Room, Enter Contact Information, Enter Reservation Detail

Explanation: The use case is described as actors , actors goal, usage of use cases, units of scope and initial point and terminating point of use cases .

The situation mentioned in the question will take place for the reservation of the room through the instances in the form like filling the contact details for the identification , filling out reservation information as well for getting the knowledge about the room requirement by the person.

These details help in reaching out the particular person if required, number of days he wants to book the room,any extra facility he would like to have etc. After these detail filling activity the room can be reserved successfully.Thus , the most appropriate option is option (b).

Other options are incorrect because room reservation cannot be done without any formality as mentioned in the question and entering contact detail and reservation detail one by one.

7 0

3 years ago