Class 6 Computer System SVTS

1.  The two categories of components that make up a computer are hardware and software.
2. Hardware refers to the physical parts of a computer system that we can touch and feel.
3. Software guides the working of the hardware components.
4. A computer is a programmable electronic device that works according to the given instructions.
5. The input devices are used to give instructions to the computer.
6. The processing is done by the CPU.
7. The results are displayed on the output devices.
8. A computer runs on electricity and understands only two states: ON or OFF.
9. ON is represented by 1 and OFF is represented by 0.
10. A computer only understands the language of zeros and ones. This language is called the binary language or machine language.
11. An input device converts instructions into binary so that the computer can understand.
12. An output device converts binary data in a form that we can understand.
13. A scanner converts printed documents into electronic formats.
14. A scanning device called OMR is used to process OMR sheets.
15. An MICR is a device used to read characters printed in a special font using magnetic ink.
16. A touchscreen is a touch-sensitive computer display screen.
17. A barcode reader is a device used to read barcodes.
18. A barcode is a small image of lines (bars) and spaces.
19. Barcodes are used to quickly input the information of a product into a computer.
20. A QR code is a two-dimensional code that consists of black and white squares.
21. A touchpad works by sensing user's finger movement and applied pressure.
22. A joystick consists of a stick attached to a base and is used to control the mouse movement.
23. A graphic tablet is used to hand-draw images using stylus.
24. A digital camera captures images or videos and store them in digital format.
25. A webcam allows us to record or send video on the web.
26. A webcam is connected through a USB cable.
27. Biometric devices identify a person's identity using distinctive physical characteristics.
28. Biometric devices are used for marking attendance.
29. A CPU is also called a processor or a microprocessor.
30. The CPU is the brain of the computer.
31. Full form of IPO is Input Process Output.
32. Full form of CPU is Central Processing Unit.
33. Full form of OMR is Optical Mark Reader.
34. Full form of MICR is Magnetic Ink Character Reader.
35. Full form of QR code is Quick Response Code.
36. Full form of ALU is Arithmetic and Logical Unit.
37. Full form of CU is Control Unit.
38. The input and output devices provide a means of communication between the computer and the user. True
39. The MICR characters can be easily read by us too. True
40. The MICR code in bank cheques enhances security. True
41. A touchscreen also acts as an input device. True
42. QR codes are commonly found in PayTM cards. True
43. We can generate QR codes online for free. True
44. QR codes can store more information than barcodes. True
45. No special scanner is required for scanning QR codes. True
46. Touchpads are usually found on laptops. True
47. Touchpads have two buttons that work like left and right mouse buttons. True
48. In laptops, a touchpad can be used in place of a mouse. True
49. Joysticks are commonly used for playing video games. True
50. A graphic tablet is of great use to digital artists. True
51. Many laptops have in-built web camera. True
52. Biometric devices enhance security. True
53. Name the two types of scanners.
    a) Flatbed scanner
    b) Handheld scanner
54. A processor's speed is measured in which unit?
    a) Megahertz (MHz)
    b) Gigahertz (GHz)
55. What are the three main parts of a CPU?
    a) ALU
    b) CU
    c) MU