Computer science ocr - Study guides, Class notes & Summaries

ocr AS Level Computer Science (H046-02) June2022 Mark Scheme.

COMPUTER SCIENCE OCR GCSE COMPONENTS OF A COMPUTER SYSTEM EXAM QUESTIONS AND ANSWERS

Computer A machine that processes data. Embedded Systems Computers built into other devices, like dishwashers, microwaves and TVs. Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:11 / 0:15 Full screen CPU Known as the 'brain' of the computer. It processes all of the data and instructions that make the systems work. Characteristics which affect the processing power of the CPU - Clock speed - Number of cores - C...

Primary Memory Memory that can be addressed and accessed directly by the processor. 2 types of primary memory ->RAM (Random Access Memory) -> RAM (Read Only Memory) Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:03 / 0:15 Full screen RAM (Random Access Memory) -> Stores parts of the OS currently being used by the computer for access by the CPU -> Stores programs currently running for access by the CPU ->...

GCSE COMPUTER SCIENCE OCR EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS LATEST UPDATE

What is Data Protection Act 1998? 1. Controls the use of personal data 2. When collecting personal data, they need to register with the government. 3. Say what they'll collect and how they will use it 4. Data subjects have the right to see personal data that an organisation holds about them. 5. Exceptions are when it affects national security, tax assessment or outcome of a court case What are the 8 principles of the Data Protection Act? 1. Fair and lawful way. 2. Adequate...

Start LDA one OUT LDA zero OUT LDA count SUB one STA count BRP start HLT One DAT 1 Zero DAT 0 Count DAT 3 Explain, giving an example, how pipelining in a CPU could speed up the execution of this program. ( 3 marks ) An instruction can be fetched as the previous one is being decoded and the one before that is being executed.E.g. LDA zero can be fetched, while OUT is being decoded and LDA start one is being executed. Describe one issue the line BRP start may cause for a CPU usin...

This is the final mark scheme

What does the CPU stand for? The Central Processing Unit. What is the CPU? The brain of the computer system. Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:01 / 0:15 Full screen What does the CPU do? Process all the data and instructions that make the computer system work. What does the processing power of a CPU depend on? It's: -Clock speed -Number of cores -Cache size What does the CPU architecture de...