Which of the following code is weed to check theif the web worker object is not exists it will creste a new web worker.eb wocker object is exists or aot?& wObj-pew Worker(if (typeofwObj) ="undefined")testWorkerFile.js");alert Web worker is created successfully")b. if (typeof(wObj)="undefined")Cpanyman_= pew Worker("testWorkerFile.js"):wObj=C wObj =new Worker("testWorkerFile.js");if (typcof(wObj)=Worker)alert("Web worker is created successfully")elsewObj new Worker("testWorkerFile js"):d. wObj = new Worker("testWorkerFile.js"):if (typeof(wObj)="undefined")alert( Web worker 15 created successfully")elsewObj = new Worker("testWorkerFile js"):Hyoure a nevcandidate please.register hare.

A web worker is basically a Javascript that operates in the background, separately of other scripts,…

Answered: Which of the following code is weed to…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Similar questions

Which of the following statement is true? O A class can extend zero or more parents, and can implement zero or more interfaces. O A class can extend zero or more parents. O A class can implement an interface and extend a parent class, but not do both. O A class can implement zero or more interfaces.
Which of the following is an example of dynamic dispatch? A: Assume you have an interface Car. There are three classes that implement the Car interface: Accord, Civic, Charger. Each of these classes has their own drive() method. There is an object myCar of type Car. When you invoke the drive() method, by calling myCar.drive() the correct implementation of drive() is chosen at runtime based upon the concrete class of myCar. B: Assume you have a variable myVariable. You have a for loop. The first time through the loop you set myVariable to an int, the next time you set it as a double, the next time a String, and finally an int. Each iteration of the loop myVariable has the correct type. C: Assume you have a class call Computation. Your computation class has a static method called add(). This method has three different versions:add(int x, int y)add(float x, float y)add(double x, double y)When you run Computation.add(x,y) the correct version of the method is chosen at compile time based…
No written by hand solution
JAVA QUESTION REQUIRES SEPARATE CLASSES, CANNOT BE WRITTEN IN ONE MAIN METHOD E.G. ACCOUNT SECTION WRITTEN IN ACCOUNT CLASS, CUSTOMER SECTION WRITTEN IN CUSTOMER CLASS ETC. Phase 2 In this phase you’ll be writing code within the methods of your classes to make the tests pass. Account Each account should have a constant, unique id. Id numbers should start from 1000 and increment by 5. The ACCOUNT_ID attribute should be initialised when the account object is created. The id should be generated internally within the class, it should not be passed in as an argument. The deposit method should increase the balance by the value passed in as an argument. The withdraw method should reduce the balance by the value passed in as an argument. It should return the value of the argument The account should be able to go overdrawn The correctBalance method should change the balance to match the value passed in as an argument. Testing your code for Account Run TestAccountInitialisation to check…
Create a class called Student that has 4 instance private variables: • FirstName: of type string. • LastName: of type string. • GPA: of type double. • Year: of type integer. The class should also include the following methods: • A constructor with parameters for instances variables FirstName, LastName, GPA and year. • 4 set methods to update the instance variables. • 4 get methods to get the instance variables values.
Write a class named Student. The class contains:■ Private String data field “name” that refers to the name of the student.■ Private integer data field “id” that refers to the student id.■ Private Date data field “dateCreated” that refers to the current date when anew object Student is created.■ A constructor that creates a new instance of the class student with the specifiedname and id.■ Three methods named getName(), getID() and getDateCreated() that returnrespectively the name, the id and the date when the student object was created.■ A toString() method that return a String representation of the student.2. Write a class named Course. The class contains:■ Private String data field “courseName” that refers to the name of the course.■ Private integer data field “capacity” that refers to the capacity of the course(default value 10).■ Private ArrayList of students that contains the students registered in thecourse.■ A constructor that creates a new course with the specified name.■ A…
Which of the following statement is not true? An anonymous inner class is compiled into a class named OuterClassName$InnerClassName.class An anonymous inner class must always extend a superclass or implement an interface, but it cannot have an explicit extends or implements clause. An anonymous inner class always uses the no-arg constructor from its superclass to create an instance. If an anonymous inner class implements an interface, the constructor is Object(). An anonymous inner class must implement all the abstract methods in the superclass or in the interface.
Task 9 Write the Student class so that the given code provides the expected output. 1. Create Student class 2. Create 3 class variable 3. Create 1 class method for object creation 4. Create 1 class method for printing [You are not allowed to change the code below] # Write your code here Оutput: Total Student(s): 0 BRAC University Student(s): 0 Other Institution Student(s): 0 Student.printDetails() print('## Name: Mikasa Ackerman mikasa = Student('Mikasa Ackerman', "CSE") mikasa.individualDetail() print('- Student.printDetails() %3D Department: CSE Institution: BRAC University Total Student(s): 1 BRAC University Student(s): 1 Other Institution Student(s): 0 print('= =') ========= harry = Student.createStudent('Harry Potter', "Defence Against Dark Name: Harry Potter Arts", "Hogwarts School") harry.individualDetail() print('- Student.printDetails() Department: Defence Against Dark Arts Institution: Hogwarts School --') Total Student(s): 2 BRAC University Student(s): 1 Other Institution…
In the set_pressure() method of the PressureRegulator class object, if valve_pressure is less than the class attribute maximal_pressure, then assign instance attribute measured_pressure with valve_pressure.
Which of the following, can be done, with the help of the this reference?
Exists a method for preventing tampering with class fields?
Create a method named getCircleDiameter that takes a radius of double type as the parameter. The method should return the diameter of a circle. To compute the diameter of a circle, multiply the radius by 2.Create a struct named Product where its fields are code, description, and price. Create a class named Person with an instance variable named full_name. Declare one (1) constructor without a parameter and initialize the variable with a default value.Create a class named Account with an instance variable named account_number. Make this class a member of the Accounts namespace.

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