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. All the calculations (arithmetic and logical) on a computer system are done by the ALU.
31. The CU checks whether all operations are taking place correctly.
32. The CPU is the brain of the computer.
33. While processing, the CPU stores data and instructions in registers.
34. A printer is used to display text and pictures on paper.
35. The output of the printer taken on paper is known as hard copy.
36. Impact printers strike pins against ink ribbon.
37. 3D printers are used to manufacture three-dimensional objects.
38. Plotters are printers used to draw high-quality images.
39. Projectors display videos, images on a big screen or other flat surfaces.
40. Primary memory is also known as main memory or internal memory.
41. RAM is a read/write memory.
42. RAM is a volatile memory.
43. ROM is a non-volatile memory.
44. ROM is a computer memory in which data is pre-recorded.
45. Secondary memory is also called auxiliary memory.
46. The secondary storage is a non-volatile memory.
47. A hard disk is the permanent secondary storage device in a computer.
48. Motherboard is the main circuit board of a computer.
49. Charles Babbage is known as the father of computing.
50. To speed up the operations of the CPU, cache memory is placed between the CPU and the primary memory.
51. Full form of IPO is Input Process Output.
52. Full form of CPU is Central Processing Unit.
53. Full form of OMR is Optical Mark Reader.
54. Full form of MICR is Magnetic Ink Character Reader.
55. Full form of QR code is Quick Response Code.
56. Full form of ALU is Arithmetic and Logical Unit.
57. Full form of CU is Control Unit.
58. Full form of VDU is Visual Display Unit.
59. Full form of BIOS is Basic Input Output System.
60. Full form of HDD is Hard Disk Drive.
61. Full form of SSD is Solid State Drive.
62. The input and output devices provide a means of communication between the computer and the user. True
63. The MICR characters can be easily read by us too. True
64. The MICR code in bank cheques enhances security. True
65. A touchscreen also acts as an input device. True
66. QR codes are commonly found in PayTM cards. True
67. We can generate QR codes online for free. True
68. QR codes can store more information than barcodes. True
69. No special scanner is required for scanning QR codes. True
70. Touchpads are usually found on laptops. True
71. Touchpads have two buttons that work like left and right mouse buttons. True
72. In laptops, a touchpad can be used in place of a mouse. True
73. Joysticks are commonly used for playing video games. True
74. A graphic tablet is of great use to digital artists. True
75. Many laptops have in-built web camera. True
76. Biometric devices enhance security. True
77. Non-impact printers make less noise. True
78. When the power supply is switched off, the information in RAM is lost. True
79. Secondary storage is slower and cheaper than the main memory. True
80. SSD gives better performance than HDD. True
81. Cache memory holds data which is frequently used by the CPU. True
82. Name the two types of scanners.
    a) Flatbed scanner
    b) Handheld scanner
83. A processor's speed is measured in which unit?
    a) Megahertz (MHz)
    b) Gigahertz (GHz)
84. What are the three main parts of a CPU?
    a) ALU
    b) CU
    c) MU
85. Name the two categories of printers.
    a) Impact printer
    b) Non-impact printer
86. Write three examples of impact printers.
    a) Dot-matrix printer
    b) Daisy wheel printer
    c) Line printer
87. Write two types of non-impact printers.
    a) Inkjet printer
    b) Laser printer
88. What are the two types of memory?
    a) Primary memory
    b) Secondary memory