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A teacher uses tablet computers with students to teach programming online - Edexcel - GCSE Computer Science - Question 3 - 2019 - Paper 1
Question 3
A teacher uses tablet computers with students to teach programming online. (a) Describe how data is stored on solid state devices. (b) State two functions of utili... show full transcript
Worked Solution & Example Answer:A teacher uses tablet computers with students to teach programming online - Edexcel - GCSE Computer Science - Question 3 - 2019 - Paper 1
Step 1
Describe how data is stored on solid state devices.
Answer
Data on solid state devices (SSDs) is stored using flash memory technology. Flash memory consists of memory cells made from floating-gate transistors. These transistors can be in a charged or discharged state, allowing them to represent binary data (1s and 0s).
- NAND Memory Structure: SSDs often use NAND flash memory, which organizes memory into pages and blocks, allowing for efficient data storage and retrieval.
- Electrons and Charge Storage: When electrical voltage is applied, electrons are trapped in the floating-gate, leading the cell to represent a binary '1'. If no charge is present, it represents a binary '0'.
- Data Management: Data read and write processes in SSDs involve complex algorithms that manage wear leveling and garbage collection, ensuring the longevity and efficiency of the device.
Step 2
State two functions of utility software.
Answer
- Disk Management: Utility software helps manage disk drives, including partitioning, formatting, and optimizing disk performance.
- Data Backup: It provides tools for backing up and restoring data to protect against data loss, ensuring that important files can be recovered if needed.
Step 3
Draw a circle around the protocol and a rectangle around the domain name.
Answer
To complete this task, you would draw a circle around 'https://' to indicate the protocol used, and a rectangle around 'www.pearson.co.uk' to highlight the domain name in the provided uniform resource locator.