Server Side And Client Side Scripting — Part 2 MCQs with Explanations

If your JavaScript code contains the < or & characters, these characters are interpreted as XML markup.

The “html” tag is the root element of any HTML document regardless of it containing a JavaScript code or not.

The above code determines the current time and stores it in the variable “now”.

The above code starts displaying the time when the document loads.

The main advantage of using the src attribute is that it simplifies your HTML files by allowing you to remove large blocks of JavaScript code from them—that is, it helps keep content and behavior separate.

If a file of JavaScript code is shared by more than one page, it only needs to be downloaded once, by the first page that uses it—subsequent pages can retrieve it from the browser cache.

The default value of the type attribute is “text/javascript”. You can specify this type explicitly if you want, but it is never necessary.

The language attribute is deprecated and should no longer be used.

Some pages present static information and can be called documents.

The Window object is the main entry point to all client-side JavaScript features and APIs. It represents a web browser window or frame, and you can refer to it with the identifier window.

The Window object is the main entry point to all client-side JavaScript features and APIs. It represents a web browser window or frame, and you can refer to it with the identifier window.

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 object also defines methods like alert() , which displays a message in a dialog box.

The setTimeout() , which registers a function to be invoked after a specified amount of time.

In client-side JavaScript, the Window object is also the global object. This means that the Window object is at the top of the scope chain and that its properties and methods are effectively global variables and global functions.

The Window object has a property named window that always refers to itself. You can use this property if you need to refer to the window object itself, but it is not usually necessary to use window if you just want to refer to access properties of the global window object.

One of the most important properties of the Window object is document: it refers to a Document object that represents the content displayed in the window.

The Document object has important methods such as getElementById(), which returns a single document element (representing an open/close pair of HTML tags and all of the content between them) based on the value of its id attribute.

The first child of a node can be accessed using the firstChild property.

Each Element object has style and className properties that allow scripts to specify CSS styles for a document element or to alter the CSS class names that apply to the element.

Each Element object has style and className properties that allow scripts to specify CSS styles for a document element or to alter the CSS class names that apply to the element.

Event handlers allow JavaScript code to alter the behavior of windows, of documents, and of the elements that make up those documents.

One of the most important event handlers is the onload handler of the Window object. It is triggered when the content of the document displayed in the window is stable and ready to be manipulated. JavaScript code is commonly wrapped within an onload event handler.

Nested functions are common in client-side JavaScript, because of its extensive use of event handlers.

The above code snippet finds all container elements with class “reveal”.

The above code snippet updates the content of the timestamp element when the user clicks on it.

There is no object called Position.

The above code snippet changes the class and lets the stylesheet specify the details.

Many web developers find it useful to build their web applications on top of a clientside framework library. These libraries are “frameworks” in the sense that they build a new higher-level API for client-side programming on top of the standard and proprietary APIs offered by web browsers: once you adopt a framework, your code needs to be written to use the APIs defined by that framework.

One of the most popular frameworks is jQuery. Here, JavaScript is a scripting language and not a framework.

The Prototype library focuses on DOM and Ajax utilities like jQuery does, and adds quite a few core-language utilities as well.

Dojo is a large framework that advertises its “incredible depth.” It includes an extensive set of UI widgets, a package system, a data abstraction layer, and more.

YUI is the in-house library of Yahoo!, and it is used on their home page.

Like Dojo, it is a large, all-encompassing library with language utilities, DOM utilities, UI widgets, and so on. There are actually two incompatible versions of YUI, known as YUI 2 and YUI 3.

Like Dojo, it is a large, all-encompassing library with language utilities, DOM utilities, UI widgets, and so on. There are actually two incompatible versions of YUI, known as YUI 2 and YUI 3.

The Closure library is the client-side library that Google uses for Gmail, Google Docs, and other web applications. This library is intended to be used with the Closure compiler, which strips out unused library functions.

GWT, the Google Web Toolkit , is a completely different kind of client-side framework. It defines a web application API in Java and provides a compiler to translate your Java programs into compatible clientside JavaScript.

GWT, the Google Web Toolkit , is a completely different kind of client-side framework. It defines a web application API in Java and provides a compiler to translate your Java programs into compatible client-side JavaScript. GWT is used in some of Google’s products, but it is not as widelyused as their Closure library.

removerListener(name,f) is the correct answer to “What is the function used to deregister event handler ‘f’”. This question is standard in competitive examination syllabi for Server Side And Client Side Scripting.

Starting an interative shell is the correct answer to “Which is a useful way to try out small and simple Rhino programs and one-liners”. This question is standard in competitive examination syllabi for Server Side And Client Side Scripting.