Computer Science GCES OCR
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Cpu Architecture Performance And Embedded Systems Ocr5 主题
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Primary And Secondary Storage Ocr6 主题
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Data Storage And Compression Ocr12 主题
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Units Of Data Storage Ocr
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Processing Binary Data Ocr
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Data Capacity And Calculating Capacity Requirements Ocr
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Converting Between Denary And Binary Ocr
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Binary Addition Ocr
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Converting Between Denary And Hexadecimal Ocr
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Converting Between Binary And Hexadecimal Ocr
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Binary Shifts Ocr
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Representing Characters Ocr
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Representing Images Ocr
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Representing Sound Ocr
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Compression Ocr
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Units Of Data Storage Ocr
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Networks And Topologies Ocr6 主题
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Wired And Wireless Networks Protocols And Layers Ocr6 主题
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Identifying And Preventing Threats To Computer Systems And Networks Ocr2 主题
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Operating Systems And Utility Software Ocr2 主题
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Ethical Legal Cultural And Environmental Impact Ocr2 主题
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Computational Thinking Searching And Sorting Algorithms Ocr3 主题
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Designing Creating And Refining Algorithms Ocr5 主题
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Programming Fundamentals And Data Types Ocr5 主题
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Additional Programming Techniques Ocr7 主题
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Defensive Design And Testing Ocr6 主题
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Boolean Logic Diagrams Ocr2 主题
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Programming Languages And Integrated Development Environments Ides Ocr3 主题
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The Exam Papers Ocr2 主题
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Structuring Your Responses Ocr3 主题
Pseudocode And Flowcharts Ocr
Exam code:J277
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When designing algorithms there are two main tools that can be used to describe them:
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Pseudocode
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Flowcharts
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Examiner Tips and Tricks
Remember, in the exam you will be expected to create, interpret, correct and refine algorithms in either flowcharts, pseudocode or OCR exam reference language
Pseudocode
What is pseudocode?
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Pseudocode is a text based tool that uses short English words/statements to describe an algorithm
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Pseudocode is more structured than writing sentences in English, but is very flexible
Example
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A casino would like a program that asks users to enter an age, if they are 18 or over they can enter the site, if not then they are given a suitable message
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Pseudocode |
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The casino would like the algorithm refined so that the user also enter their first name and this is used to greet the user when they access the site
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Pseudocode |
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What is OCR exam reference language?
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OCR exam reference language is the officially designed pseudocode that is seen in OCR based exams to describe algorithms
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Pseudocode has no official syntax so to keep exams consistent OCR have developed their own
Examples
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Function |
OCR exam reference language |
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OUTPUT |
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INPUT |
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SELECTION |
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FOR LOOPS |
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WHILE LOOPS |
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Examiner Tips and Tricks
OCR exam reference language is so close to Python syntax that you can write algorithms in Python in both section A and B of the exam!
Worked Example
Rewrite the flowchart as a pseudocode [4]
You must use either
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Pseudocode or
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OCR Exam Reference Language
Answer
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Pseudocode |
OCR exam reference language |
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Flowcharts
What is a flowchart?
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Flowcharts are a visual tool that uses shapes to represent different functions to describe an algorithm
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Flowcharts show the data that is input and output, the processes that take place and any decisions or repetition
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Lines are used to show the flow of control
Example
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Flowchart |
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The casino would like the algorithm refined so that the user also enter their first name and this is used to greet the user when they access the site
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Flowchart |
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Responses