Subjects
Careers
Maths
Chemistry
Biology
English Lang.
History
Energy transfers (a2 only)
Infection and response
Homeostasis and response
Responding to change (a2 only)
Cell biology
Organisms exchange substances with their environment
Biological molecules
Organisation
Substance exchange
The control of gene expression (a2 only)
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Ecology
Cells
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2m wars and welfare: britain in transition, 1906-1957
World war two & the holocaust
1f industrialisation and the people: britain, c1783-1885
2o democracy and nazism: germany, 1918-1945
Medieval period: 1066 -1509
1l the quest for political stability: germany, 1871-1991
Britain & the wider world: 1745 -1901
2d religious conflict and the church in england, c1529-c1570
The cold war
1c the tudors: england, 1485-1603
Inter-war germany
2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
World war one
Britain: 1509 -1745
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260
•
4 Dec 2022
•
Nitya
@nm___r
Binary and Data Representation: A Comprehensive Guide for GCSE Students... Show more
This page builds upon the previous concepts, introducing hexadecimal notation and exploring character sets and image representation in digital systems.
The hexadecimal number system is explained as a base-16 system, using digits 0-9 and letters A-F. A conversion table is provided, showing the relationships between denary, hexadecimal, and binary representations for numbers 0 to 15.
Highlight: Hexadecimal is commonly used in computing as it provides a more compact representation of binary data.
The document then transitions to character sets, introducing three main types:
Definition: A character set is a defined list of characters recognized by computer hardware and software.
ASCII is described as a 7-bit encoding system, capable of representing 128 characters. The types of characters included in ASCII are listed, such as control codes, punctuation symbols, upper and lowercase letters, and numeric digits.
Vocabulary: Extended ASCII - An 8-bit encoding system that expands the original ASCII set to include 256 characters, allowing for special characters and accents used in various languages.
Unicode is presented as a more comprehensive character encoding standard:
Highlight: Unicode uses 16 bits, allowing for over 65,000 characters, which enables support for a wide range of languages including Chinese, Hindi, and Korean.
The document then shifts focus to image representation in digital systems. Key concepts introduced include:
Definition: Color depth refers to the number of bits used to represent the color of a single pixel in an image.
The relationship between color depth and the range of available colors is explained. The concept of image resolution is introduced, defined as the number of pixels per inch or dots per inch .
Example: An image with dimensions 1000x800 pixels and a color depth of 4 bits per pixel would have a file size of 400,000 bytes .
The page concludes with an explanation of how to calculate image file sizes based on dimensions and color depth, providing a practical application of the concepts covered.
This comprehensive coverage of advanced data representation concepts provides students with a solid understanding of how different types of data are encoded and stored in computer systems, which is essential knowledge for GCSE Computer Science.
This page introduces the basic concepts of data representation in computing, focusing on binary and its relationship to denary numbers.
The fundamental units of data storage are explained, starting from the smallest unit - a bit:
Definition: A bit is the smallest unit of data in computing, representing a single binary digit .
The hierarchy of data storage units is presented, progressing from bits to bytes, and then to larger units:
Highlight: Understanding these units is crucial for comprehending data storage capacities in modern computing systems.
The page then delves into binary and denary conversion. It provides a comprehensive table showing binary representations of denary numbers from 0 to 15, which is essential for understanding how to convert binary to denary.
Example: The binary representation of the denary number 13 is 1101.
The document also introduces the concept of binary addition, explaining the basic rules:
Several examples of binary addition are provided, including more complex calculations that demonstrate carrying over digits.
Vocabulary: Overflow - occurs when the result of a calculation requires more bits than are available in the given range.
The concept of binary shift is introduced, explaining how shifting binary digits to the left or right effectively multiplies or divides the number by 2, respectively.
Example: Shifting 00001111 one place to the left results in 00011110, effectively doubling the value.
This page provides a solid foundation for understanding binary representation and operations, which is crucial for further study in computer science.
App Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Nitya
@nm___r
Binary and Data Representation: A Comprehensive Guide for GCSE Students
This guide covers essential concepts in data representation, including binary and denary conversion, character sets, and image encoding. It provides detailed explanations of data storage units, binary operations, and... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page builds upon the previous concepts, introducing hexadecimal notation and exploring character sets and image representation in digital systems.
The hexadecimal number system is explained as a base-16 system, using digits 0-9 and letters A-F. A conversion table is provided, showing the relationships between denary, hexadecimal, and binary representations for numbers 0 to 15.
Highlight: Hexadecimal is commonly used in computing as it provides a more compact representation of binary data.
The document then transitions to character sets, introducing three main types:
Definition: A character set is a defined list of characters recognized by computer hardware and software.
ASCII is described as a 7-bit encoding system, capable of representing 128 characters. The types of characters included in ASCII are listed, such as control codes, punctuation symbols, upper and lowercase letters, and numeric digits.
Vocabulary: Extended ASCII - An 8-bit encoding system that expands the original ASCII set to include 256 characters, allowing for special characters and accents used in various languages.
Unicode is presented as a more comprehensive character encoding standard:
Highlight: Unicode uses 16 bits, allowing for over 65,000 characters, which enables support for a wide range of languages including Chinese, Hindi, and Korean.
The document then shifts focus to image representation in digital systems. Key concepts introduced include:
Definition: Color depth refers to the number of bits used to represent the color of a single pixel in an image.
The relationship between color depth and the range of available colors is explained. The concept of image resolution is introduced, defined as the number of pixels per inch or dots per inch .
Example: An image with dimensions 1000x800 pixels and a color depth of 4 bits per pixel would have a file size of 400,000 bytes .
The page concludes with an explanation of how to calculate image file sizes based on dimensions and color depth, providing a practical application of the concepts covered.
This comprehensive coverage of advanced data representation concepts provides students with a solid understanding of how different types of data are encoded and stored in computer systems, which is essential knowledge for GCSE Computer Science.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page introduces the basic concepts of data representation in computing, focusing on binary and its relationship to denary numbers.
The fundamental units of data storage are explained, starting from the smallest unit - a bit:
Definition: A bit is the smallest unit of data in computing, representing a single binary digit .
The hierarchy of data storage units is presented, progressing from bits to bytes, and then to larger units:
Highlight: Understanding these units is crucial for comprehending data storage capacities in modern computing systems.
The page then delves into binary and denary conversion. It provides a comprehensive table showing binary representations of denary numbers from 0 to 15, which is essential for understanding how to convert binary to denary.
Example: The binary representation of the denary number 13 is 1101.
The document also introduces the concept of binary addition, explaining the basic rules:
Several examples of binary addition are provided, including more complex calculations that demonstrate carrying over digits.
Vocabulary: Overflow - occurs when the result of a calculation requires more bits than are available in the given range.
The concept of binary shift is introduced, explaining how shifting binary digits to the left or right effectively multiplies or divides the number by 2, respectively.
Example: Shifting 00001111 one place to the left results in 00011110, effectively doubling the value.
This page provides a solid foundation for understanding binary representation and operations, which is crucial for further study in computer science.
App Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
