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Basics of Computer and Input Devices with Examples (in Hindi)
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Here Navdeep Kaur is discussing Basics of Computer and input devices

Navdeep Kaur is teaching live on Unacademy Plus

Navdeep Kaur
JRF Awardee, NET qualified with over 7 years of teaching experience & Expert in NTA UGC NET JRF.

Unacademy user
madam plz dnt mind the english u r speaking is good but everybody has to understand and it shuld be clean
Sanyam Kapila
2 years ago
Keep the wheel of your knowledge rolling, watch this new course The Hindu Vocabulary Analysis from The Hindu
very nice explanation :)
Navdeep Kaur
2 years ago
hello mam good after noon mam mai bhi unacademy me padana chahata hu kaise join kare
maam how to download your notes
ma'am how can I download this lesson as PDF..
nice video support us for any exam thankq
Navdeep Kaur
2 years ago
Vikram Singh
2 years ago
Vikram Singh
2 years ago
you have any fb page ??
  1. ICT Computer Aptitude Important Computer Basics Components of computer Input device Output device Processing Unit By Navdeep Kaur unacademy Rate, Review, Comment, Share

  2. A Computer is a General purpose machine, commonly consisting of digital circuitry, that accepts (inputs), stores, manipulates, and generates (outputs) data as numbers, text, graphics, voice, video files, or electrical signals, in accordance with instructions called a program Keyboard Monitor CPU Printer Mouse Other input Speaker Data Information Other input Memory ) | Other output

  3. Father of the computer - Charles Babbage Father of the modern computer Alan Turing Basic Architecture of Computer: John Von Neumann (1947-49) Von Neumann Architecture. Von Neumann architecture was first published by John von Neumann in 1945. His computer architecture design consists of a Control Unit, Arithmetic and Logic Unit (ALU), Memory Unit, Registers and Inputs/Outputs. This design is still used in most computers produced today. First Programmer: Lady Ada Lovelae (1880) Augusta Ada King-Noel, Countess of Lovelace was an English mathematician and writer, chiefly known for her work on Charles Babbage's proposed mechanical general-purpose computer, the Analytical Engine. First Electronic Computer: ENIAC (1946) J.P. Eckert & J.W. Mauchly at the University of Pennsylvania First computer for the home user introduced IBM in 1981 .

  4. Mains Parts of computer Hardware - Computer hardware is what you can physically touch includes the computer case, monitor, keyboard, and mouse. It also includes all the parts inside the computer case, such as the hard disk drive, motherboard, video card, and many others. Input Devices In computing, an input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or information appliance. Examples: keyboards, mice, scanners, digital cameras and joysticks.

  5. Keyboard - A Keyboard is the most fundamental input device for any computer system. It helps to enter data in computer. Mouse A mouse is used to input data by sending a signal to the computer, based on hovering the cursor and selecting with the left mouse button. The left mouse acts as a 'enter' button. The right mouse button can be selected and will often pop up a window of choices. The scrolling wheel is used to move the view of the screen up or down. By moving your mouse to a location in a document, on a digital photo or over a choice of music, you can click the left mouse button to place the cursor.

  6. Trackballs A trackball is an input device used to enter motion data into computers or other electronic devices. It serves the same purpose as a mouse, but is designed with a movable ball on the top, which can be rolled in any direction. Instead of moving the whole device, you simply roll the movable ball on top of the trackball unit with your hand to generate motion input.

  7. Barcode reader - A barcode reader (or barcode scanner) is an electronic device that can read and output printed barcodes to a computer. Like a flatbed scanner, it consists of a light source, a lens and a ligh sensor translating optical impulses into electrical ones. Digital camera a camera which produces digital images that can be stored in a computer and displayed on screen. Gamepad - a handheld controller for video games. Joystick a lever that can be moved in several directions to control the movement of an image on a computer or similar display screen. It mainly used in playing games Microphone an instrument for converting sound waves into electrical energy variations which may then be amplified, transmitted, or recorded.

  8. Scanner- a device that scans documents and converts them into digital data. Webcam a video camera connected to a computer, allowing its images to be seen by Internet users. Optical character recognition (OCR) is the mechanical or electronic conversion of images of typed, handwritten or printed text into machine-encoded text.

  9. Digitizer It converts analog information into digital form. Optical Mark reading (OMR) - Optical Mark Readers reads pencil or pen marks made in pre-defined positions on paper forms as responses to questions or tick list prompts made in pre-defined positions

  10. ICT Computer Aptitude Important Computer Basics Components of computer Input device Output device Processing Unit By Navdeep Kaur unacademy Rate, Review, Comment, Share

  11. Central Processing Unit (CPU) Input devices Output devices Aarnai Main Memory RAM) emo Contsol unt Secondary (backing) storage

  12. Basic structure of CPU CPU (Central processing unit) A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions. *CPU Heart of the Computer CPU Process: 1.Fetch the Instruction 2.Interpret the Instruction 3.Fetch the Data 4.Process the Data 5 Write the data

  13. There are two kinds of monitors CRT (Cathode ray tube)-The cathode ray tube (CRT) is a vacuum tube containing one or more electron guns, and a phosphorescent screen used to view images. Cathode and Control heating coil grid Horizontal and vertical deflction plates Electron beam s1 ic Accelerating and focusing anodes rhy Vacuum Fluorescent screen

  14. Impact printer An impact printer is a printer that strikes a print head against an ink ribbon to mark the paper. Common examples include dot matrix and daisy-wheel printers. Non-lmpact printer Non-impact printers print the characters without using ribbon. Two common types of non-impact printers include inkjet printers, which spray small drops of ink onto each page, and laser printers, which roll ink onto the paper using a cylindrical.

  15. Storage Unit or Memory Unit Memory Primary Secondary Cache Hard Disk Magnetic Tape, CD, DVD, Zip Disk etc RAM ROM Static PROM Dynamic EPROM EEPROM


  17. Register Register is one of a small set of data holding places that are part of the computer processor. A register may hold an instruction, a storage address, or any kind of data (such as a bit sequence or individual characters). Some instructions specify registers as part of the instruction.

  18. 2. ROM (Read only memory)-Once data has been written onto a ROM chip, it cannot be removed and can only be read. Unlike main memory (RAM), ROM retains its contents even when the computer is turned off.ROM is referred to as being nonvolatile.

  19. RAM vs ROM RAM ROM RAN ROM RAM ROM DEFINITION a form of data storage that can be accessed randomly at any time, in any order and from any physical location. a form of data storage that can not be easily altered or reprogrammed. STANDS FOR Random Access Memory Read-only memory stores the program required to initially boot the computer. It only allows reading. USE read data quickly to run applications. It allows reading and writing. VOLATILITY volatile (contents are lost when the device is powered off). non-volatile (contents are retained even when the device is powered off). TYPES M, EPROM and EEPROM. RAM

  20. 3. Cache: A cache is a place to store something temporarily in a computing environment. Cache memory, also called CPU memory, is random access memory (RAM)

  21. 1 4 bit Nibble 2 8 bit 1 byte 3 1024 B 1 KB (210) 4 1024 KB 1 MB(220) 5 1024 MB 1 GB(230) 6 1024 GB 1 TB(240) 7 1024 TB 1 PB(250) 8 1024 PB 1 xB(260) 9 1024 XB 1 ZB(270) 10 1024 ZB 1 YB(280)

  22. Secondary memory Secondary memory is a type of computer memory that is not directly accessed by the central processing unit (CPU) of a computer and is usually available as non-volatile memory. One of the most common forms of this memory is the hard drive of a computer, which is used to store the operating system (OS) and other programs. Other forms of secondary memory include disc drives for compact discs (CDs) or digital versatile discs (DVDs), as well as removable flash memory.

  23. System Fan FloppY HeatSink Hard Drive Power Supply Optieal Drive Motherboard Processors (CPU) RAM Moduels

  24. Hard Drive a rigid non-removable magnetic disk with a large data storage capacity. Floppy disk- A floppy disk, also called a diskette or just disk, is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic carrier lined with fabric that removes dust particles. Floppy disks are read and written by a floppy disk drive (FDD) Magnetic Tape Magnetic tape used in recording sound, pictures, or computer data. Flash memory a kind of memory that retains data in the absence of a power supply.

  25. Mother board A motherboard is the main circuit board inside a computer that connects the different parts of a computer together. It has sockets for the CPU, RAM and expansion cards (e.g. discrete graphics cards, sound cards, network cards, storage cards etc)... and it also hooks up to hard drives, disc drives and front panel ports with cables and wires.Also known as mainboard, system board.