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52. What Is Binary • Language That Hardware Uses to Communicate

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52. What Is Binary • Language That Hardware Uses to Communicate Language that hardware uses to communicate Digital images are made up of little dots of colour 52. What is Binary Made of 1’s and 0’s - 1 means on and data is present 57. Pixels called pixels and 0 means off and no data is present Image resolution describes the quality of an image. It tells 53. Binary Table 128 64 32 16 8 4 2 1 58. Image Resolution us how many pixels there are in an image. The higher the number, the better the image quality is. The letter A is represented by the number 65 Image resolution is measure in pixels per inch 128 64 32 16 8 4 2 1 For short, this is written as ppi 54. A in Binary 59. Pixels per Inch 0 1 0 0 0 0 0 1 Sometimes, it is referred to as dpi and this is short for dots So A is 01000001 per inch C = 67 60. High Resolution Because high resolution images contain more pixels per inch 128 64 32 16 8 4 2 1 Images – Good Points they can create very good quality images 0 1 0 0 0 0 1 1 Because high resolution images contain more pixels per inch a = 97 55. Text to Binary 61. High Resolution they hold a lot of data. 128 64 32 16 8 4 2 1 Images – Bad Points The bad point of a high resolution image is that they can Converting the 0 1 1 0 0 0 0 1 often take up a lot of storage space word Cat to Binary t = 116 128 64 32 16 8 4 2 1 Because they do not contain as many pixels per inch as high 62. Low Resolution 0 1 1 1 0 1 0 0 resolution images, they do not take up as much storage Images – Good Points space Which means Cat is: 01000011 01100001 01110100 56. Binary to Text 128 64 32 16 8 4 2 1 Because they do not contain as many pixels per inch as high 63. Low Resolution 0 1 0 0 0 1 0 0 =64 resolution images, they image quality can be poor. They can What does this Images – Bad Points 0 1 1 0 1 1 1 1 =111 sometimes look pixelated (blurry) say? 0 1 1 0 0 1 1 1 =103 01000100 01101111 64 is a D, 111 is an o, 103 is a g The binary colour for black is 1 01100111 64. Binary Colours So this spells the word Dog The binary colour for white is 0 65. Software Programs that run on a computer 74. Bug An error in a program is called a bug. Computers need precise instructions. They have no Systems software helps run and maintain the computer. It common sense and will only do what a user tells it to so. 66. Systems software includes the operating system, drivers and utility software. They cannot create their own errors. 67. Operating System The biggest part of systems software is the operating system. 75. Execute To execute a program means to run a program It is an essential part that allows other systems software, and 76. Variables A variable is an element, feature, or factor that is liable to application software, to communicate with hardware. vary or change. In a computer game, an example of a Examples include Windows, Mac OS, Android and iOS. variable would be the score Helps to maintain the computer and keep it in good working 77. If, Else Use if to specify a block of code to be executed, if a 68. Utility Software order. An example of utility software is Anti-Virus software specified condition is true Use else to specify a block of code to be executed, if the 69. Applications software is used to carry out tasks on a same condition is false Applications Software computer, such as writing an email, making a poster, doing For Example: homework and messaging friends. Some of the applications If your password is correct then you can log onto the we might use to do this include a word processor, web computer browser and graphics software. Else, you get a message saying incorrect password The means by which a user interacts with a computer or 78. Loop A loop is a programming structure that repeats a sequence 70. User Interface device. of instructions until a specific condition is met What You See Is What You Get For Example: 71. WYSIWYG With WYSIWYG, what is shown on screen is exactly how it will Guess what number I am thinking of… look when printed. 10 No! Try again 72. Formatting Changing a document’s appearance. 7 You can change a document’s appearance using formatting No! Try again options such as: 5 change the font and font size No! Try again bold, italicise and underline words 3 colour the text Yes! 79. While Loop A while loop will execute a set of statements as long as a 73. Information can be presented as: condition is true. Ways Information Can Text, Images, Graphs, Audio, Video, Animation For Example: Be Presented While it is raining: Keep the umbrella up .
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