Ocr compute Study guides, Class notes & Summaries
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GCSE OCR COMPUTER SCIENCE NETWORKS EXAM QUESTIONS FULLY SOLVED.
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GCSE OCR COMPUTER SCIENCE NETWORKS EXAM QUESTIONS FULLY SOLVED.
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OCR Computer Science Exam with Guaranteed Accurate Answers
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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 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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GCSE OCR COMPUTER SCIENCE NETWORK EXAM QUESTIONS AND CORRECT ANSWERS
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GCSE OCR COMPUTER SCIENCE 
NETWORK EXAM QUESTIONS 
AND CORRECT ANSWERS 
GCSE OCR COMPUTER SCIENCE 
NETWORK EXAM QUESTIONS 
AND CORRECT ANSWERS
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ocr computer science EXAM STUDY GUIDE
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ocr computer science EXAM STUDY GUIDE
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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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OCR COMPUTER SCIENCE (9-1) J276/01 COMPUTER SYSTEMS MOCK-PAPER QUESTIONS & MARKING SCHEME.latest 2024
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J276/01 COMPUTER SYSTEMSOCR COMPUTER SCIENCE (9-1) 
J276/01 COMPUTER SYSTEMS 
MOCK-PAPER QUESTIONS & MARKING SCHEME.latest 2024
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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]
- Exam (elaborations) • 8 pages • 2024
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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 Paper 1 Question Fully Answered.
- Exam (elaborations) • 7 pages • 2024
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Available in package deal
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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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