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Correct choice is (a) GETCONTEXT()

The best I can EXPLAIN: The HTMLCanvasElement.getContext() method RETURNS a drawing context on the canvas, or null if the context identifier is not supported. Most of the Canvas drawing API is defined not on the canvas ELEMENT itself, but instead on a “drawing context” object obtained with the getContext() method of the canvas.

Right answer is (a) Firefox

For explanation I would say: SpiderMonkey is MOZILLA’s JavaScript ENGINE written in C and C++. It is used in various Mozilla products, including Firefox, and is AVAILABLE under the MPL2. SpiderMonkey is the JavaScript engine made by Mozilla that is used in Firefox.

Correct option is (B) Netscape

Explanation: Gecko is the NAME of the layout ENGINE developed by the Mozilla Project. Gecko was first developed at Netscape, before the Mozilla Project SPUN out as its own entity, as the SUCCESSOR to the original Netscape rendering engine, back in 1997.

Correct CHOICE is (b) CanvasRenderingContext2D object

Easy explanation: Call GETCONTEXT() with the argument “2d” to obtain a CanvasRenderingContext2D object that you can use to DRAW two-dimensional graphics into the canvas. It is important to understand that the canvas ELEMENT and its context object are two very different objects.

Right OPTION is (c) SIZE of IP PACKET should be less than 65535

For explanation: The total size of the page is important, not just because of the time it takes to download, but because the maximum size of an IP packet is 65535 OCTETS for IPv4 and IPv6.

Correct choice is (B) Interpreting the JavaScript

The BEST I can explain: The JavaScript ENGINE is GENERALLY USED for interpreting the JavaScript. It is used to interpret the javascript and execute the javscript on the web page.

The correct choice is (c) Creates DRAWING surface & Exposes powerful drawing API to client-side JavaScript

Explanation: The HTML canvas element is used to draw graphics, on the fly, via JavaScript. The canvas element is only a CONTAINER for graphics. The canvas element has no APPEARANCE of its own but creates a drawing surface WITHIN the DOCUMENT and exposes a powerful drawing API to client-side JavaScript.

Right answer is (d) All of the mentioned

Easy explanation: Rendering Engine takes HTML code and interprets it into what you see VISUALLY. More TOOLS than just browsers render HTML, including EMAIL CLIENTS and web components in other applications.

Correct option is (d) beginPath()

EXPLANATION: The beginPath() method begins a PATH, or resets the current path. It is called before CREATING any path or CURVE.

Correct choice is (d) Application Layer

Best EXPLANATION: An application layer is an abstraction layer that specifies the shared communications protocols and interface METHODS USED by hosts in a communications NETWORK. The Application layer handles the top-level communication that the client and SERVERS use, like HTTP and SMTP for email clients.

Right ANSWER is (b) img

To EXPLAIN I would say: Web pages INCLUDE images using the HTML img element. src tag is used to include the image link.

The correct option is (c) CONTROLS

For EXPLANATION I would say: Both audio and video support a controls attribute. When PRESENT, it SPECIFIES that audio controls should be displayed. Both audio and video support a controls attribute.

The correct ANSWER is (d) OPERA

The explanation: Opera uses Carakan, which was INTRODUCED in 2010. Mozilla uses spidermonkey and SAFARI uses nitro javascript engine.

Correct choice is (d) Both Chrome and Safari

Explanation: WebKit is a browser engine USED in Apple’s Safari browser and other products. Webkit is what Chrome and Safari use, and is your target for most mobile web DEVELOPMENT since it is used as the layout or RENDERING engine for Android devices as well as mobile Safari for iOS devices and the Silk browser on KINDLE FIRES.

The correct ANSWER is (b) document.images[]

For explanation: The BEST suited option is document.image[] to FIND all img ELEMENTS in the document.[index] is used to specify the index of which img tag is to be selected.

The correct option is (a) HTTP Response

To explain I would say: The REMOTE server FINDS the resource and returns it in an HTTP Response, the status of which is 200 to indicate a good response. 400 status code is used to indicate a BAD request.

Right choice is (b) INTERNET LAYER

The explanation: The internet layer is a group of internetworking methods, protocols, and specifications in the Internet protocol suite that are used to transport network packets from the originating HOST across network boundaries. The Internet layer HANDLES network addressing and routing, getting IP and MAC ADDRESSES.

The CORRECT answer is (a) audio

To explain: The audio tag is used to include audio in the HTML document. The audio tag INCLUDES method like play(), PAUSE() ETC.

The correct option is (c) Dynamically generated graphics

Explanation: Dynamic graphics for DATA, means simulating motion or MOVEMENT using the computer. It MAY ALSO be thought of as multiple plots linked by time. Dynamically generating graphics from real-time data uses a lot of CPU cycles.

The correct answer is (a) Bandwidth saving

To explain I would say: The CODE used to PRODUCE graphics on the CLIENT side is typically much smaller than the images themselves, creating substantial bandwidth SAVINGS.

Right CHOICE is (B) shadowBlur

Explanation: shadowBlur is used to check how crisp or fuzzy SHADOWS are. The shadowBlur property sets or returns the BLUR level for shadows.

The correct choice is (C) Path of lines and CURVES

To explain I would say: SVG stands for ‘Scalable Vector Graphics’ and it is USED to define graphics for the WEB. SVG is mostly used for vector type DIAGRAMS like Two-dimensional graphs in an X, Y coordinate system, Pie charts etc. SVG describes complex shapes as a “path” of lines and curves that can be drawn or filled.

Right ANSWER is (d) All of the mentioned

The best I can EXPLAIN: TCP stands for transmission CONTROL protocol which controls the transmission of data over the internet. This handshake consists of a Synchronize, Synchronize-Acknowledge, and Acknowledge message to be passed between the browser and the REMOTE server. This handshake allows the client to attempt communication, the server to acknowledge and accept the attempt, and the client to acknowledge that the attempt has been accepted.

Right option is (a) Remote server

Explanation: The two most common methods of http are GET and post. Once the TCP/IP CONNECTION has been established, the browser sends an HTTP GET request over the connection to the remote server. The remote server FINDS the resource and returns it in an HTTP Response, the STATUS of which is 200 to indicate a good response.

Correct answer is (c) UI Layer

Explanation: The USER interface layer represents the front END of theWeb CLIENT, and contains the ACTUAL GUI elements that USERS view and click. The UI Layer takes care of the User Interface.

Correct CHOICE is (c) Both Parsing & DRAWING all objects in page

To elaborate: It’s responsible for DISPLAYING the web page. The rendering engine parses the HTML and the CSS and displays the parsed CONTENT on the screen. A Rendering Engine is GENERALLY used for parsing and drawing all of the objects in the page.

Right ANSWER is (a) Network Access Layer

Easy explanation: The Network Access Layer is the LOWEST layer of the TCP/IP PROTOCOL hierarchy. The Network Access layer controls the COMMUNICATION between the hardware in the network.

The correct choice is (c) SHARED with other PROPERTIES & EMBEDDED in other tools

To elaborate: A JavaScript ENGINE is a program or an interpreter which EXECUTES JavaScript code. The interpreter can be shared with other properties, or embedded in other tools.

Right answer is (C) 9

To explain I WOULD say: The canvas element is not SUPPORTED by IE before IE9, but it can be reasonably well emulated in IE6, 7, and 8. It is supported from version 4 in chrome and 2 in firefox.

Correct answer is (c) breadth

The EXPLANATION is: The video TAG does not contain a breadth PROPERTY. The WIDTH and HEIGHT property specifies the width and height of the video.

Correct option is (c) JavaScript code is so LARGE

Explanation: When the amount of JavaScript code is so large that it effectively obscures the HTML, we CALL JavaScript as obtrusive. On the other hand unobtrusive JavaScript is a best practice methodology for attaching JavaScript to the front-end of a WEBSITE.

Correct ANSWER is (d) Implementation of image rollovers

Easy explanation: Image replacement is a TECHNIQUE developed to allow designers to use image-based typesetting while MEETING accessibility requirements. One common use for image replacement is to implement image rollovers, in which an image CHANGES when the mouse pointer MOVES over it.

Correct choice is (c) Transport LAYER

To elaborate: The transport layer is the layer in the OPEN system interconnection (OSI) model responsible for end-to-end communication over a network. The Transport layer is where our TCP (or UDP) communication TAKES place.