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Correct choice is (a) Structured clone ALGORITHM

The explanation is: BLOBS REPRESENT data that isn’t necessarily in a JavaScript-native format. Blobs are supported by the structured clone algorithm, which means that you can obtain one from another WINDOW or thread via the message event.

The correct answer is (C) Both Use NEW KEYWORD and Call Image()

Easiest explanation: The Image() CONSTRUCTOR creates and preloads a new image object. The url is SPECIFIED and the image is preloaded.

The correct choice is (d) Modularity

Explanation: The Closure Compiler is a TOOL for making JavaScript download and runs faster. Instead of COMPILING from a source language to machine code, it compiles from JavaScript to better JavaScript. The closure compiler is highly beneficial in terms of:

Efficiency: The Closure Compiler reduces the size of your JavaScript files and makes them more efficient, helping your APPLICATION to load faster and REDUCING your bandwidth needs.

Code checking: The Closure Compiler PROVIDES warnings for illegal JavaScript and warnings for potentially dangerous operations, helping you to produce JavaScript that is less buggy and easier to maintain.

The CORRECT option is (B) Traverses the stack

To ELABORATE: The interpreter executes the javascript code. Normally when you reference VARIABLES in other scopes at the global level, in other namespaces, and so on—the interpreter needs to traverse the stack to get to the VARIABLE.

Right CHOICE is (a) Removes whitespaces

The explanation: The javascript minifier compresses the javascript code. In Simple mode it mostly performs LIKE most other minifiers, REMOVING whitespace, line breaks, and COMMENTS.

Right option is (b) Server

Explanation: The DATA information from the client side is first SENT to the server side. Form VALIDATION USED to occur at the server after the client had entered all necessary data and then PRESSED the Submit button.

The CORRECT answer is (c) stopTimeLogging()

To explain: The startTimeLogging() METHOD CAPTURES the timing data for ad hoc, ETC for referencing an uncached document.location. In order to STOP capturing the ad hoc timing for referencing uncached document.location, we call the method stopTimeLogging().

Correct answer is (c) CONSTRUCTOR

Explanation: When EXECUTING scripts in an HTML page, the page becomes unresponsive until the script is finished. To create a NEW WORKER, just use the Worker() constructor, passing a URL that specifies the JavaScript code that the worker is to run :

Right answer is (b) Function

Best explanation: Namespace in JavaScript is nothing but a single global object which will contain all our functions, methods, variables and all that. When you CREATE a locally scoped variable for CACHING the reference, the TRAVERSAL reverses in the FORWARD direction and thus, after going to the namespace, it goes to the function.

The correct answer is (a) getElementbyId()

To explain I would say: The getElementbyId() is used to get the DOM object in JavaScript by simply CALLING that function associated with the HTML DOCUMENT. The object in this method GETS referenced by the ID name.

Right answer is (b) Plugins

Explanation: The JavaScript navigator OBJECT is used for BROWSER detection. The JavaScript navigator object INCLUDES a CHILD object CALLED plugins.

Correct OPTION is (a) SETTIMEOUT()

Explanation: The setTimeout(function, duration) CALLS function after duration MILLISECONDS from now. setInterval(function, milliseconds) is same as setTimeout(), but repeats the execution of the function continuously.

Correct answer is (b) Attributes don’t have attributes

For explanation I would say: When a web page is loaded, the BROWSER creates a Document Object MODEL of the page. The reason for AVOIDING the attributes property in the HTML DOM is because Attributes don’t have attributes.

Correct answer is (a) Window

For explanation I WOULD say: Namespace in JavaScript is nothing but a SINGLE global OBJECT which will contain all our functions, methods, variables and all that. During the TRAVERSAL in the stack manner, after going to the namespace, it GOES to the Window.

Correct OPTION is (a) User Interface elements

Easiest EXPLANATION: Form control elements: The form object CONTAINS all the elements defined for that object such as TEXT fields, buttons, radio buttons, and checkboxes. The elements COLLECTION returns a collection of all elements in a form.

Right OPTION is (c) LOAD content without loading new document

To elaborate: The XMLHTTPREQUEST object can be used to request data from a web server. XMLHttpRequest makes it possible to load ADDITIONAL content from the Web without loading a new document, a core component of AJAX.

Right choice is (b) Reachability

The explanation: The central concept of JAVASCRIPT memory MANAGEMENT is a concept of reachability. The main cause for leaks in garbage collected languages are UNWANTED references.

A distinguished set of objects are assumed to be reachable: these are known as the roots. Typically, these include all the objects referenced from anywhere in the call stack (that is, all local VARIABLES and parameters in the functions currently being invoked), and any global variables.

Objects are kept in memory while they are accessible from roots through a reference or a CHAIN of references.

Right option is (c) Dynamically generating HTML in Java and JavaScript

The BEST explanation: Instead of compiling from a source language to MACHINE code, closure TEMPLATES COMPILES from JavaScript to better JavaScript. Closure compiler provides with the basic facilities of removing spaces and dead code. Closure Templates are a templating system for dynamically generating HTML in both Java and JavaScript. Because the language was apparently referred to as “Soy” internal to Google, and “Soy” remains in some of the documentation and classes, sometimes Closure Templates are referred to as “Soy Templates”.

Right ANSWER is (b) 2

To explain: The CLOSURE Compiler is a TOOL for MAKING JavaScript download and run faster. There are TOTALLY 2 modes in which the closure compiler can be run namely:

Simple mode

Advanced mode.

Correct answer is (b) Reduces the size of the JavaScript FILES

Explanation: The Closure COMPILER is a tool for making JavaScript DOWNLOAD and runs FASTER. The Closure Compiler reduces the size of your JavaScript files and makes them more efficient, helping your application to load faster and reducing your bandwidth needs.