Computer data processing
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All about Computer data processing Author: Tô Văn Lâm Email: tovanlam20132223@gmail.com
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Computer data processing
- 2. Contents Data What is Data What is differences between data and information What types of Data Computer Data processing What components of computer involved in data processing How computer processing data Data processing What is Data processing What is six stages of the Data Processing Cycle What types of Data processing
- 3. Data Data is a collection of facts & figures, such as values or measurements. The data is the raw material to be processed by a computer.
- 4. Data versus Information Data Subject Point • A • B • F Information Pass Subject • Yes • Yes • No When data are processed, interpreted, organized, structured or presented so as to make them meaningful or useful, they are called information
- 5. Differences in Meaning Data Information A collection of facts represented of represented in the form of note, letters words A collection of data which conveys some meaningful idea is information. It may provide answers to questions like who, which, when, why, what, and how. - The raw input is data and it has no significance when it exists in that form. When data is collated or organized into something meaningful, it gains significance. - This meaningful organization is information.
- 6. Type of Data Numeric Data Character Data
- 7. Numeric Data The data which is represented in the form of numbers is known as Numeric Data. This includes 0-9 digits, a decimal point (.), +, /, – sign and the letters “E” or “D”. binary number • 0, 1, 1010 … decimal number • 1, 2, 3, 4, 5… hexadecimal number: • 1A, E3, F4…
- 8. Character Data String Data • Alphabetic Data : a to z • Alphanumeric Data : a to z & decimal numbers or space Graphic Data • Pictures • Charts • Maps
- 11. Data processing cycle Collection Preparation Input Processing Output Storage Six stages of the Data Processing Cycle - Data processing is simply the conversion of raw data to meaningful information through a process. - The data is processed again and again until the accurate result is achieved.
- 12. Input Input is the task where verified data is coded or converted into machine readable form so that it can be processed through a computer Coding Verification Storing
- 13. Processing Processing is when the data is subjected to various means and methods of manipulation, the point where a computer program is being executed, and it contains the program code and its current activity. classifying,
- 14. Processing Processing is when the data is subjected to various means and methods of manipulation, the point where a computer program is being executed, and it contains the program code and its current activity. classifying, sorting,
- 15. Processing Processing is when the data is subjected to various means and methods of manipulation, the point where a computer program is being executed, and it contains the program code and its current activity. classifying, sorting, calculating,
- 16. Processing Processing is when the data is subjected to various means and methods of manipulation, the point where a computer program is being executed, and it contains the program code and its current activity. classifying, sorting, calculating, summarizing,
- 17. Processing Processing is when the data is subjected to various means and methods of manipulation, the point where a computer program is being executed, and it contains the program code and its current activity. classifying, sorting, calculating, summarizing, comparing
- 18. Output Output is presented to users in various report formats like printed report, audio, video, or on monitor. Text
- 19. Output Output is presented to users in various report formats like printed report, audio, video, or on monitor. Text Graphics
- 20. Output Output is presented to users in various report formats like printed report, audio, video, or on monitor. Text Graphics Audio
- 21. Output Output is presented to users in various report formats like printed report, audio, video, or on monitor. Text Graphics Audio Video
- 22. Storage Storage is a location which data, instruction and information are held for future use. Every computer uses storage to hold system software and application software. A storage medium, also called secondary storage is the physical material in the computer that keeps data, instruction and information.
- 23. Types of Data Processing MDP EDP Real time Processing Bath Processing
- 24. Manual Data Processing The process of data entry implies many opportunities for errors, such as Delays in data capture, A high amount of operator misprints, High labor costs from the amount of manual labor required etc.
- 25. Types of Data Processing MDP EDP Real time Processing Bath Processing
- 26. Electronic data processing Use of computers for recording, manipulating, and summarizing data. Computer can help: Accuracy 1 1 10
- 27. Electronic data processing Use of computers for recording, manipulating, and summarizing data. Computer can help: Accuracy Speed
- 28. Electronic data processing Use of computers for recording, manipulating, and summarizing data. Computer can help: Accuracy Speed Consistency
- 29. Electronic data processing Use of computers for recording, manipulating, and summarizing data. Computer can help: Accuracy Speed Consistency Storage capacity
- 30. Electronic data processing Use of computers for recording, manipulating, and summarizing data. Computer can help: Accuracy Speed Consistency Storage capacity Automation
- 32. Computer data processing The eleven data of processing operations in a computer are : recording verifying duplicating classifying sorting calculating summarizing and reporting merging storing retrieving feedback.
- 33. The components involved data processing Central Processing Unit (CPU) Computer Memory (RAM and ROM) Data bus Ports Motherboard Hard disk Output Devices Input Devices
- 34. Central Processing Unit (CPU) Arithmetic Logical Unit (ALU) • Arithmetic operations – performing calculations, which include addition, subtraction, multiplication, and division • Comparison operations – comparing data items to determine if the first item is greater than, equal to, or less than the other item • Logical operations – working with conditions and logical operators such as AND, OR, and NOT Control Unit (CU) • fetching the instruction or data item from memory, • decoding the instruction into commands the computer understands • executing the commands, and, if necessary • storing, or writing the result to memory
- 35. Central Processing Unit (CPU)
- 36. Central Processing Unit (CPU)
- 37. Central Processing Unit (CPU)
- 38. Central Processing Unit (CPU)
- 39. Central Processing Unit (CPU)
- 40. Central Processing Unit (CPU)
- 41. Central Processing Unit (CPU)
- 42. Computer Memory (RAM and ROM) When the computer is doing any job, the data that have to be processed are stored in the primary memory The following terms related to memory of a computer are discussed below: Random Access Memory (RAM) Read Only Memory (ROM) Programmable read-only memory (PROM) Cache Memory Registers
- 43. Computer Memory (RAM and ROM)
- 44. Input Devices Keyboard: The layout of keyboard is just like the traditional typewriter of the type QWERTY Mouse: . It rolls on a small ball and has two or three buttons on the top Scanner: Scanner is an optical device that can input any graphical matter and display it back
- 45. Input Devices
- 46. Output Devices Visual Display Unit: It is also called the monitor. Speaker: Printer: It is an important output device which can be used to get a printed copy of the processed text or result on paper.
- 47. Output Devices
- 49. Computer Processing Operations A computer can perform only the following four operations which enable computers to carry out the various data processing activities we have just discussed.
- 50. Computer Processing Operations A computer can perform only the following four operations which enable computers to carry out the various data processing activities we have just discussed. Input / Output operations
- 51. Computer Processing Operations A computer can perform only the following four operations which enable computers to carry out the various data processing activities we have just discussed. Input / Output operations Calculation and text manipulation Operations
- 52. Computer Processing Operations A computer can perform only the following four operations which enable computers to carry out the various data processing activities we have just discussed. Input / Output operations Calculation and text manipulation Operations Logic/Comparison Operations
- 53. Computer Processing Operations A computer can perform only the following four operations which enable computers to carry out the various data processing activities we have just discussed. Input / Output operations Calculation and text manipulation Operations Logic/Comparison Operations Storage and Retrieval Operations
- 54. How CPU Work ?