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 All of the above.

Explanation: JavaScript is not a pure OOP’s (object oriented programming) based languages such as PHP, java or many other languages, although it is an object-based language. It is not OOP’s based language, because it doesn’t have three basic properties of object-oriented programming languages, such as polymorphism, encapsulation, and inheritance.

Explanation:The “src” term is used to refer to any JavaScript file. JavaScript.

Cookies are transient by default; the values they store last for the duration of the web browser session but are lost when the user exits the browser. When a web server has sent a web page to a browser, the connection is shut down, and the server forgets everything about the user.

The Window object defines properties like location, which refers to a Location object that specifies the URL currently displayed in the window and allows a script to load a new URL into the window. The window.location object can be used to get the current page address (URL) and to redirect the browser to a new page.

Date() is a predefined function in javascript which returns the date in string form. The above code determines the current time and stores it in the variable “now”.

Developers who need to work with really huge amounts of data like to use databases, and the most recent browsers have started to integrate client-side database functionality into their browsers. Client data base helps in making the website faster and handling the data easier.

Client-side timer functions are used to perform applications based on time constraints. Node supports the client-side timer functions set setTimeout(), setInterval(), clearTimeout(), and clearInterval().

Because packages and classes are represented as JavaScript objects, you can assign them to variables to give them shorter names. But you can also more formally import them, if you want to:

import class(java.util.HashMap); // Same as : var HashMap = java.util.HashMap

”EOF” stands for end of file.The above code snippet gets “end” event fired on EOF when no more data will arrive.

When using square bracket notation, the expression inside the square brackets must evaluate to a sting or a value that can be converted to a string.

Web pages include images using the HTML img element.

The onerror handler method can be registered to be invoked when uncaught JavaScript exceptions occur.

The removeAllListeners(name) is used to remove all handlers from name events represented as :
emitter.removeAllListeners(name)

The behavior of the instance of a class is defined by the class and is shared by all instances.

Arrays have a pop() method (it works with push()) that reduces the length of an array by 1 but also returns the value of the deleted element.

To determine whether one object is the prototype of (or is part of the prototype chain of) another object, one should use the isPrototype() method. To find out if p is the prototype of o write p.isPrototypeOf(o).

Minification refers to the process of removing unnecessary or redundant data without affecting how the resource is processed by the browser. Sheer file size reduction is the only one aspect of the overall determination got from the R along with the minification.

The Video tab allows you to capture screenshots of your page as it loads and views them as a video.

Web performance refers to the speed in which web pages are downloaded and displayed on the user’s web browser. The span of time that you are waiting for the page to be usable depends on web performance.

The status code 200 indicates a successful response from the server. A 400 status code represents a bad request.

Consider an example, Date.prototype inherits properties from Object.prototype, so a Date object created by new Date() inherits properties from both Date.prototype and Object.prototype. This linked series of prototype objects is known as the prototype chain.

filter() − Creates a new array with all of the elements of this array for which the provided filtering function returns true.

The API accepts a total of 8 parameters namely :
1. url
2. location
3. runs
4. fvonly
5. private
6. block
7. f
8. k

The client and server communicate over a long-lived TCP socket following rules defined by the WebSocket protocol.

The usedJsHeapSize property is the amount of memory that all of the current objects in the heap are using.

The reason for avoiding the attributes property in the HTML DOM is because Attributes don’t have attributes.

The userAgent[] property is a string that contains the code name and version of the browser. This value is sent to the originating server to identify the client.