J277 - Study guides, Class notes & Summaries

What is the CPU? : Central Processing Unit Processes all information What is the fetch-execute cycle? : 1. Fetch The next instruction from memory 2. Decode the Instruction 3. Get data if needed 4. Execute the instruction (repeat) What is the ALU? : Arithmetic logic unit. Part of the CPU that carries out two types of operations: calculations & decisions. What is the CU? : control unit. It manages the instructions. 2 What is cache? : Temporary memory. Small amount of high-speed RAM...

A computer has a quad core processor, what does this mean? : The computer has 4 separate cores, each capable of running cycles, so more cycles can be run simultaneously The Program counter is incremented by an amount governed by the Control Unit..True or False? : False - the PC increments by one ,unless in a jump <- not for GCSE The Decode part of the cycle is actioned by the CIR : False - is completed by the control unit What comes next....the address bus points at the correct addr...

J277 PROGRAMMING EXAM LATEST UPDATE...

OCR J277 EXAM LATEST UPDATE...

a concise guide on all of paper 2 of the GCSE J277 OCR specification. a powerpoint broken down by topic covering all content. topics covered include: computational thinking, searching and sorting algorithms, programming fundamentals, data types, additional programming, defensive design methods, syntax and logic errors, boolean logic, languages and IDEs

J277 - UNIT 1.1 - SYSTEMS ARCHITECTURE EXAM 2024...

Stand alone computer : a computer that is not connected to a network What is a network? : a number of computers linked together to allow then to share resources (hardware, software and data) What are the advantages of networks? : - files can be stored in one place - can share hardware (printers) - share files - easy communication What are the disadvantages of networks? : - buying cabling and file servers can be expensive - danger of hacking 2 - viruses can spread to other computer...

The purpose of the CPU : To perform the fetch-decode-execute cycle to processexecute instructions Describe the stages of fetch execute cycle : Instructions are fetched from memory The control unit will decode the instructions The decoded instruction is then executed so that the CPU performs continuously The process is repeated Describe the role of a register : A high-speed memory units within the CPU. Can only store a single value at a time (8,16,32,64 bits depending upon the architec...