We see computers everywhere, in offices, schools and in home. So let's start with learning basic fundamentals of a computer.
With respect to class 4 Fundamentals of Computer, a computer is an electronic device. It was created by the Charles Babbage. 'Computer' is taken from a word 'compute' which means calculate. A computer can do the following work-
With respect to class 4 computer lessons, a computer is made up of three main parts. They are-
The Input Unit
With respect to class 4 Fundamentals of Computer, the information which we enter into the computer is known as Input. It can be words, numbers, pictures or sound. Input is entered into the computer through input devices.
Input unit consists of input devices such as-
Let us learn about a few input devices.
Keyboard
With respect to class 4 computer lessons, the keyboard is an input device. Just as you use a pencil to write on a paper, the computer needs a keyboard to tell it what to do. A keyboard has 101 keys.
Mouse
The mouse is a pointing input device. A mouse has two or three buttons called Left, Right and Middle button. Buttons are used to perform different functions like to select an object, opening a program, etc.
The Processing Unit
With respect to class 4 computer lessons, the computer carries out all its work in the central processing unit (CPU). It processes data according to the instructions provided. CPU is the brain of the computer. Just as our brain controls all the different parts of the body and makes them work together, the CPU controls all other parts of the computer and makes them work together. All other parts of the computer are connected to CPU. The CPU also stores all the information in the computer.
The Output Unit
With respect to class 4 Fundamentals of Computer, when an input is processed in the computer, it gives a result which is known as Output. The output is displayed from the computer through output devices.
Output unit consists of output devices such as-
Let us learn about few output devices.
Monitor
With respect to class 4 Fundamentals of Computer, a monitor is like a television; it shows us what work the computer carries out. The glass surface of the monitor is called the screen. It shows whatever you type on the keyboard or draw with the mouse.
Printer
A printer gives output on a paper. A printer can print output as text or images. There are colour printers as well as black and white printers.
Speaker
With respect to class 4 computer lessons, speakers are one of the most common output devices. Sounds produced by the computer or songs played on it are heard through the speakers.
Examples:
Q1. Computers can .................. a large amount of information.
Ans: Store.
Q2.How many keys does a keyboard have?
Ans: 101 keys.
Q3. ............................. is a pointing input device.
Ans: Mouse.
Q4. CPU is the ........................ of the computer.
Ans: Brain.
Q5. The glass surface of the monitor is called?
Ans: Screen.
Recap
Q.1 |
The proper definition of a modern digital computer is _____. |
| a) |
an electronic automated machine that can solve problems involving words and numbers |
| b) | a more sophistic and modified electronic pocket calculator |
| c) | any machine that can perform mathematical operations |
| d) | a machine that works on binary code |
Q.2 |
From which generation computers the printers were used? |
| a) | First |
| b) | Second |
| c) | Third |
| d) | Fourth |
Q.3 |
Which is not a computer classification? |
| a) | Mainframe |
| b) | Maxframe |
| c) | Mini |
| d) | Notebook |
Q.4 |
Which of the following is not a microcomputer? |
| a) | Laptop PCs |
| b) | Tablet PCs |
| c) | Desktop PCs |
| d) | Mouse |
Q.5 |
The first general purpose electronic digital computer in the world was ? |
| a) | UNIVAC |
| b) | EDVAC |
| c) | ENIAC |
| d) | IBM |
Q.6 |
Number crunchier is also known as _________. |
| a) | Mini computer |
| b) | Super computer |
| c) | Microcomputer |
| d) | Mainframe computer |
Q.7 |
Which of the following is not a class of computers based on size? |
| a) | Mainframe Computers |
| b) | Mini Computers |
| c) | Micro Computers |
| d) | Super Computers |
Q.8 |
Who invented EDSAC? |
| a) | John v. Neumann |
| b) | J.P. Eckert and John Mauchley |
| c) | Maurice Wilkes |
| d) | Howard Aiken |
Q.9 |
Which of the following is a class of computers based on model? |
| a) | Digital Computer |
| b) | Hybrid Computers |
| c) | Analog Computers |
| d) | AT Computers is a class of computers based on model. |
Q.10 |
Why ABC computer is called so? |
| a) | Because it was developed by Atanasoff and Berry |
| b) | Because it was thought to be the first computer so named with first alphabets of English |
| c) | Both of above are the reason to name the computer ABC |
| d) | Because of its working features. |
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