Distinguish between the following javascript built-in method, Basic Computer Science

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QUESTION

(a) Draw an annotated diagram explaining how data is transmitted to web servers during a standard form submit event.

(b) What in your opinion makes a bad web site? Suggest possible solutions.

(c) Distinguish between the following JavaScript built-in methods:

(i) indexOf()

(ii) charAt()

Illustrate your answer with suitable examples.

(d) Traffic researchers are monitoring road usage using a CCTV camera and they want a simple program which they can use to record the numbers of cars and trucks passing the camera position. They would like a simple applet having two buttons, one marked "Car" and the other marked "Truck" which they can press, and a simple display with two labels to show the total number of cars and trucks that are passed by. The applet must look as follows:

                                                                            502_applet.png


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