Data storage
OCR
GCSE
13
Objectives
0
Exam Tips
0
Pitfalls
0
Key Terms
0
Mark Points
Subtopics in this area
How to convert positive denary whole numbers to binary numbers (up to and including 8 bits) and vice versa
How to add two binary integers together (up to and including 8 bits) and explain overflow errors which may occur
How to convert positive denary whole numbers into 2-digit hexadecimal numbers and vice versa
How to convert binary integers to their hexadecimal equivalents and vice versa
Binary shifts
The use of binary codes to represent characters
The term ‘character set’
The relationship between the number of bits per character in a character set, and the number of characters which can be represented, e.g. ASCII Unicode
How an image is represented as a series of pixels, represented in binary
Metadata
The effect of colour depth and resolution on The quality of the image The size of an image file
How sound can be sampled and stored in digital form
The effect of sample rate, duration and bit depth on The playback quality The size of a sound file
Data storage Revision Guide
Learning Objectives
What you need to know and understand
- How to convert positive denary whole numbers to binary numbers (up to and including 8 bits) and vice versa
- How to add two binary integers together (up to and including 8 bits) and explain overflow errors which may occur
- How to convert positive denary whole numbers into 2-digit hexadecimal numbers and vice versa
- How to convert binary integers to their hexadecimal equivalents and vice versa
- Binary shifts
- The use of binary codes to represent characters
- The term ‘character set’
- The relationship between the number of bits per character in a character set, and the number of characters which can be represented, e.g. ASCII Unicode
- How an image is represented as a series of pixels, represented in binary
- The effect of colour depth and resolution on The quality of the image The size of an image file
- How sound can be sampled and stored in digital form
- The effect of sample rate, duration and bit depth on The playback quality The size of a sound file
Sample Exam Questions
Worked examples for OCR GCSE Data storage — try each before revealing the answer