Showing posts with label Class Notes: Computer Fundamentals. Show all posts
Showing posts with label Class Notes: Computer Fundamentals. Show all posts

Describe Different Types of Viruses.

Computer Virus:

A computer virus is a parasitic program that infects other legitimate programs, which are sometime referred as hosts. To infect the host program, the virus modifies the host to store a copy of the virus. After infection, viruses make various damages to the system which may be low to high to critical.

To qualify as virus, a program must be able to replicate itself. This can mean copying itself in different places on the same computer or other computers by reaching them using connected networks or internet.

Taking control of hardware devices, slowing down computer by taking control of resources, filling up storage space, making files & folders inaccessible etc are a few among various activities of computer viruses.


What are the activities of computer virus?

Computer Virus:

A computer virus is a parasitic program that infects other legitimate programs, which are sometime referred as hosts. To infect the host program, the virus modifies the host to store a copy of the virus. After infection, viruses make various damages to the system which may be low to high to critical.

To qualify as virus, a program must be able to replicate itself. This can mean copying itself in different places on the same computer or other computers by reaching them using connected networks or internet.


What are the Differences between Computer Hardware and Software?

Computer Hardware:

Computer Hardware is any part of the computer that can be touched. These are primarily electronic devices used to build up the computer. Computer Hardware actually perform the computing operations along with taking input and sending the computed result as output or to storing that.


What are the 5 key parts of a micro-computer? Illustrate their working procedure.

The 5 key parts of a micro-computer system are as follows
  1. Processor
  2. Memory
  3. I/O Devices
  4. Storage Devices
  5. Programs
Read More: Describe the 5 key parts of a micro-computer.

Describe the 5 key parts of a micro-computer.


A micro-computer is a machine built with hardware and ran by software. The 5 key parts among the various hardware and software are as follows.

Write down about the computer hardware devices in the organization of a micro computer.


A basic PC (Personal Computer) has a number of computer hardware elements. Most of these elements are contained in the system unit of the micro computer. The hardware devices in the organization of a micro computer are as follows.

What is Bus and Bus Speed? Illustrate interconnected buses in motherboard.

Bus:

Bus is an electrical path that resides inside the motherboard. There are two main types of bus; internal or system bus and external or expansion bus. The system bus connects the CPU to other devices and the expansion bus connects the external devices such as keyboard, mouse etc. to the CPU. The three main parts of the bus are control lines, address lines and data lines.


5 Differences between RAM and Cache Memory

RAM (Random Access Memory) is a volatile memory which is used by the CPU as the Primary Memory of the system. CPU stores frequently used data of the programs running at a moment in RAM as RAM is faster than storage devices, this helps the CPU to work faster. 

7 Differences between RAM and ROM

RAM stands for Random Access Memory and ROM stands for Read Only Memory. Both of these devices are memory devices and are required by a system to function. Following are the differences between RAM and ROM.

8 Differences between optical and magnetic storage devices.


Optical Storage Devices:

Optical storage devices are flat, round disks that spins around its center. The difference with magnetic storage device is that in optical storage devices LASER light is used to read and write data in disks. Examples are CD, DVD etc.

Compare among Assembler, Compiler and Interpreter

Assembler, compiler and interpreter are translator software but they are different mostly on how they translate.

What are the different types of programming languages based on evolution history. Discuss.

Based on evolution history, programming languages are divided into these three broad categories, they are as follows,

Write short notes on Optical Storage Device


Storage Device:

Those memory devices where we can store data and the data remains in it even without electricity are called storage devices. Along with various programs and system software, user can also keep, delete, move, update the data in storage devices, while this can not be done in memory devices by the user.

Storage devices are very important, along with the need storage for our data, the system software needs to store it's necessary file and configuration even when the computer has no electricity. 

There are primarily 2 types of storage devices; one of those are Optical Storage Devices.

Write short notes on Magnetic Storage Devices

Storage Device:

Those memory devices where we can store data and the data remains in it even without electricity are called storage devices. Along with various programs and system software, user can also keep, delete, move, update the data in storage devices, while this can not be done in memory devices by the user.

Storage devices are very important, along with the need storage for our data, the system software needs to store it's necessary file and configuration even when the computer has no electricity. 

There are primarily 2 types of storage devices; one of those are Magnetic Storage Devices.

What is software? What are the various types of software.

Software:

Software is a set of instructions that make the computer perform tasks. In other words, software tells the computer what to do.

Though the array of available programs is vast and varied, most software fall into two major categories; system software and application software.

"Software brings the machine to life" - Justify this satement.

Software Brings The Machine to Life:

The ingredient that enables any computer to perform any task is software, which contains instructions. Set of instructions that drive a computer to perform specific tasks is called a program. These instructions tell the machine's physical components what to do; without the instructions the computer can not do anything.

Describe various kinds of key groups in keyboards

Keyboard:

Keyboard is an input device used to enter text, numbers and many more symbols and commands into the computer system.

Standard Keyboard Layout:

Keyboard comes in many styles or layouts. The various models differ from shape, size and feel. Among the IBM compatible computers, the most common keyboard layout is the IBM Enhanced Keyboard. It has about 100-104 keys on it. There are six groups of keys.

5 Differences between disk and diskette drives

Differences between disk and diskette drives:

The differences between disk and diskette drives are as follows.

How the computer accepts input from the keyboard?

Accepting Input from Keyboard:

When we press a key, a tiny chip in the keyboard called keyboard controller notes that a key has been pressed. Keyboard controller places a coed in the buffer of the keyboard to indicate which key was pressed. Keyboard buffer is a temporary memory of the keyboard controller. The keyboard controller sends a signal to the system software notifying that something happened at the keyboard.

"Keyboard is considered as an input device" - why?

Input Device:

As it's name implies, input devices are devices which can send signals to the CPU. That means, the device we use to send or enter a signal or data to CPU are called input device, such as; keyboard, mouse, microphone etc.