What is Process

A process or running process refers to a set of instructions currently being processed by the computer processor.

Security Threats:

Security threats are relentlessly inventive. Masters of disguise and manipulation, these threats constantly evolve to find new ways to annoy, steal and harm. Arm yourself with information and resources to safeguard against complex and growing computer security threats and stay safe online.

Define Operating system

An operating system is a powerful, and usually large, program that controls and manages the hardware and other software on a computer. All computers and computer-like devices have operating systems, including laptop, tablet, desktop, smartphone, smartwatch, and router etc., often abbreviated as OS.

Browser

It is important to understand the differences between different browsers in order to handle each in the way it is expected. So it is important to know which browser your web page is running in.

To get information about the browser your webpage is currently running in, use the built-in navigator object.

IMAGE MAP

You can use JavaScript to create client-side image map. Client-side image maps are enabled by the usemap attribute for the <img /> tag and defined by special <map> and <area> extension tags.

The image that is going to form the map is inserted into the page using the <img /> element as normal, except that it carries an extra attribute called usemap. The value of the usemap attribute is the value of the name attribute on the <map> element, which you are about to meet, preceded by a pound or hash sign.

The <map> element actually creates the map for the image and usually follows directly after the <img /> element. It acts as a container for the <area /> elements that actually define the clickable hotspots. The <map> element carries only one attribute, the name attribute, which is the name that identifies the map. This is how the <img /> element knows which <map> element to use.

The <area> element specifies the shape and the coordinates that define the boundaries of each clickable hotspot.

The following code combines imagemaps and JavaScript to produce a message in a text box when the mouse is moved over different parts of an image.

Every now and then, developers commit mistakes while coding. A mistake in a program or a script is referred to as a bug.

The process of finding and fixing bugs is called debugging and is a normal part of the development process. This section covers tools and techniques that can help you with debugging tasks.

You can use JavaScript to create a complex animation having, but not limited to, the following elements:

·         Fireworks

·         Fade Effect

·         Roll-in or Roll-out

·         Page-in or Page-out

·         Object movements

FORM VALIDATION

Form validation normally used to occur at the server, after the client had entered all the necessary data and then pressed the Submit button. If the data entered by a client was incorrect or was simply missing, the server would have to send all the data back to the client and request that the form be resubmitted with correct information. This was really a lengthy process which used to put a lot of burden on the server.

ERRORS AND EXCEPTIONS

There are three types of errors in programming: (a) Syntax Errors, (b) Runtime Errors, and (c) Logical Errors.

reverse ()

JavaScript array reverse() method reverses the element of an array. The first array element becomes the last and the last becomes the first.

Syntax

Its syntax is as follows:

array.reverse();

Return Value

Returns the reversed single value of the array.