Computer Fundamentals

Computer is an advanced electronic device that takes raw data as an input from the user and processes it under the control of a set of instructions (called program), produces a result (output), and saves it for future use

Functionalities of a Computer

If we look at it in a very broad sense, any digital computer carries out the following five functions −
Step 1 − Takes data as input.
Step 2 − Stores the data/instructions in its memory and uses them as required.
Step 3 − Processes the data and converts it into useful information.
Step 4 − Generates the output.
Step 5 − Controls all the above four steps.
Computer

Advantages of Computers

Following are certain advantages of computers.

High Speed

  • Computer is a very fast device.
  • It is capable of performing calculation of very large amount of data.
  • The computer has units of speed in microsecond, nanosecond, and even the picosecond.
  • It can perform millions of calculations in a few seconds as compared to man who will spend many months to perform the same task.

Accuracy

  • In addition to being very fast, computers are very accurate.
  • The calculations are 100% error free.
  • Computers perform all jobs with 100% accuracy provided that the input is correct.

Storage Capability

  • Memory is a very important characteristic of computers.
  • A computer has much more storage capacity than human beings.
  • It can store large amount of data.
  • It can store any type of data such as images, videos, text, audio, etc.

Diligence

  • Unlike human beings, a computer is free from monotony, tiredness, and lack of concentration.
  • It can work continuously without any error and boredom.
  • It can perform repeated tasks with the same speed and accuracy.

Versatility

  • A computer is a very versatile machine.
  • A computer is very flexible in performing the jobs to be done.
  • This machine can be used to solve the problems related to various fields.
  • At one instance, it may be solving a complex scientific problem and the very next moment it may be playing a card game.

Reliability

  • A computer is a reliable machine.
  • Modern electronic components have long lives.
  • Computers are designed to make maintenance easy.

Automation

  • Computer is an automatic machine.
  • Automation is the ability to perform a given task automatically. Once the computer receives a program i.e., the program is stored in the computer memory, then the program and instruction can control the program execution without human interaction.

Comments

Post a Comment

Popular posts from this blog

Digital Transmission

Image
Data can be represented either in analog or digital form. The computers used the digital form to store the information. Therefore, the data needs to be converted in digital form so that it can be used by a computer. DIGITAL-TO-DIGITAL CONVERSION Digital-to-digital encoding is the representation of digital information by a digital signal. When binary 1s and 0s generated by the computer are translated into a sequence of voltage pulses that can be propagated over a wire, this process is known as digital-to-digital encoding. Digital-to-digital encoding is divided into three categories: Unipolar Encoding Polar Encoding Bipolar Encoding Unipolar Digital transmission system sends the voltage pulses over the medium link such as wire or cable. In most types of encoding, one voltage level represents 0, and another voltage level represents 1. The polarity of each pulse determines whether it is positive or negative. This type of encoding is known as Unipolar encoding as it ...
Read more

What is Topology?

Image
Topology defines the structure of the network of how all the components are interconnected to each other. There are two types of topology: physical and logical topology. Physical topology is the geometric representation of all the nodes in a network. Bus Topology The bus topology is designed in such a way that all the stations are connected through a single cable known as a backbone cable. Each node is either connected to the backbone cable by drop cable or directly connected to the backbone cable. When a node wants to send a message over the network, it puts a message over the network. All the stations available in the network will receive the message whether it has been addressed or not. The bus topology is mainly used in 802.3 (ethernet) and 802.4 standard networks. The configuration of a bus topology is quite simpler as compared to other topologies. The backbone cable is considered as a  "single lane"  through which the message is broadcast to all the st...
Read more

O Level M2 R4 Solved Jan 2020 (Long Questions)

Image
5(A) W ebsite Development Timeline When you think of building a website, your thoughts rotate around two main issues – price and time. These two values depend largely on the size and scope of the project. To outline the whole development process, you can create a website development timeline, adding tasks, and establishing milestones for your project. It is the best way to track your project implementation to make sure you keep up with the deadline. The Web Site Design and Development Process There are numerous steps in the web site design and development process. From gathering initial information, to the creation of your web site, and finally to maintenance to keep your web site up to date and current.  The exact process will vary slightly from designer to designer, but the basics are the same.  1. Information Gathering  2. Planning  3. Design  4. Development 5. Testing and Delivery  6. Maintenance 5(B) <div style="text-align:center;"> ...
Read more