Ocr computer science Study guides, Class notes & Summaries
Looking for the best study guides, study notes and summaries about Ocr computer science? On this page you'll find 768 study documents about Ocr computer science.
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OCR COMPUTER SCIENCE PAPER 1 EXAM QUESTIONS AND ANSWERS ALREADY GRADED A+
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What is the purpose of systems software? 
Software designed to run or maintain a computer 
 
 
 
Describe the functionality of systems software. 
It controls the operations of computer hardware 
 
 
 
 
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What is an operating system? 
A piece of software responsible for running the computer, managing hardware, applications, users and resources 
 
 
 
What are the 5 things th...
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OCR Computer Science GCSE //CPU EXAM WITH ANSWERS [100% PASS]
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OCR Computer Science GCSE //CPU 
EXAM WITH ANSWERS [100% PASS] 
CPU - Central Processing Unit 
executes instructions, processes data, fetches data and stores data into main memory 
once executed (performs the fetch decode execute cycle). It make a computer system 
function 
MAR - Memory Adress Register 
holds the address of the current instruction that is to be fetched from memory 
MDR - Memory Data Register 
holds the contents found at the address held in the MAR 
Main Memory/Primary Storage...
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OCR Computer Science GCSE //CPU EXAM WITH ANSWERS [100% PASS]
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OCR Computer Science GCSE //CPU 
EXAM WITH ANSWERS [100% PASS] 
CPU - Central Processing Unit 
executes instructions, processes data, fetches data and stores data into main memory 
once executed (performs the fetch decode execute cycle). It make a computer system 
function 
MAR - Memory Adress Register 
holds the address of the current instruction that is to be fetched from memory 
MDR - Memory Data Register 
holds the contents found at the address held in the MAR 
Main Memory/Primary Storage...
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A-Level OCR Computer Science (1.1.1) Exam 2024 Questions & Answers 100% accurate!
- Exam (elaborations) • 5 pages • 2024
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A-Level OCR Computer Science (1.1.1) Exam 2024 Questions & Answers 100% accurate! 
CPU - ANSWERSCentral Processing Unit 
 
ALU - ANSWERSArithmetic Logic Unit 
 
CU - ANSWERSControl Unit 
 
PC (CPU) - ANSWERSProgram Counter 
 
ACC - ANSWERSAccumulator 
 
MAR - ANSWERSMemory Address Register 
 
MDR - ANSWERSMemory Data Register 
 
CIR - ANSWERSCurrent Instruction Register 
 
Define CPU - ANSWERSThe main processor in a computer system handling data and instructions. 
 
Define ALU - ANSWERSA circuit...
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GCSE OCR Computer Science: Networks Questions with Correct Answers 2024/2025
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GCSE OCR Computer Science: Networks Questions with Correct Answers 2024/2025GCSE OCR Computer Science: Networks Questions with Correct Answers 2024/2025GCSE OCR Computer Science: Networks Questions with Correct Answers 2024/2025GCSE OCR Computer Science: Networks Questions with Correct Answers 2024/2025GCSE OCR Computer Science: Networks Questions with Correct Answers 2024/2025GCSE OCR Computer Science: Networks Questions with Correct Answers 2024/2025GCSE OCR Computer Science: Networks Question...
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OCR Computer Science A Level Paper 1 Exam Questions and Answers
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PC Program counter, contains the address of the next instruction 
CIR Current Instruction Register: stores the address of the next instruction currently 
being executed and decoded 
MAR Memory Address Register, holds relevant memory address (to read from or 
write to) 
MDR Memory Data Register, stores data being transferred to and from memory, acts 
as a buffer 
ALU Arithmetic and Logic Unit, does all mathematical calculations and makes all 
logical decisions 
Accumulator A storage register ...
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Networking - OCR Computer Science EXAM REVISED [100% PASS]
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Networking - OCR Computer Science 
EXAM REVISED [100% PASS] 
Computer Network *Ans* A collection of computing devices connected so that they can 
communicate and share resources 
Wireless *Ans* A network connection made without physical wires 
Node (host) *Ans* Any addressable device attached to a network 
Data transfer rate (bandwidth) *Ans* The speed at which data is moved from one place to 
another on a network 
Protocol *Ans* A set of rules that defines how data is formatted and processed ...
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OCR Computer Science Paper 1 Question Fully Answered.
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What is the purpose of systems software? - correct answer Software designed to run or maintain a computer 
 
Describe the functionality of systems software. - correct answer It controls the operations of computer hardware 
 
What is an operating system? - correct answer A piece of software responsible for running the computer, managing hardware, applications, users and resources 
 
What are the 5 things that operating systems are used for? - correct answer providing a UI, memory management/multi...
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OCR Computer Science A Level - 1.3.2 Databases Correct Questions And Answers
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OCR Computer Science A Level - 1.3.2 Databases Correct Questions And Answers OCR Computer Science A Level - 1.3.2 Databases Correct Questions And Answers OCR Computer Science A Level - 1.3.2 Databases Correct Questions And Answers OCR Computer Science A Level - 1.3.2 Databases Correct Questions And Answers OCR Computer Science A Level - 1.3.2 Databases Correct Questions And Answers OCR Computer Science A Level - 1.3.2 Databases Correct Questions And Answers OCR Computer Science A Level - 1.3.2 D...
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Networking - OCR Computer Science EXAM REVISED [100% PASS]
- Exam (elaborations) • 6 pages • 2024
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Networking - OCR Computer Science 
EXAM REVISED [100% PASS] 
Computer Network *Ans* A collection of computing devices connected so that they can 
communicate and share resources 
Wireless *Ans* A network connection made without physical wires 
Node (host) *Ans* Any addressable device attached to a network 
Data transfer rate (bandwidth) *Ans* The speed at which data is moved from one place to 
another on a network 
Protocol *Ans* A set of rules that defines how data is formatted and processed ...
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