A computer system has a 2.5GHz processor and 5GB of RAM - OCR - GCSE Computer Science - Question 1 - 2021 - Paper 1
Question 1
A computer system has a 2.5GHz processor and 5GB of RAM.
(a) Complete the paragraph about memory by writing the missing terms in the spaces, using the words provide... show full transcript
Worked Solution & Example Answer:A computer system has a 2.5GHz processor and 5GB of RAM - OCR - GCSE Computer Science - Question 1 - 2021 - Paper 1
Step 1
Complete the paragraph about memory
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Answer
ROM stands for read only memory. This stores the start-up instructions for a computer and cannot be changed.
RAM stands for random access memory. This stores the instructions and data that are currently being used. If the computer does not have enough RAM to run a process it can make use of virtual memory.
RAM and ROM are both examples of primary memory. Memory located close to the processor that allows faster access than from RAM is called cache memory.
Step 2
State the purpose of a CPU
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Answer
The CPU performs the Fetch-Decode-Execute (FDE) cycle: it processes instructions and manages the operations of a computer.
Step 3
State what is meant by a single core 2.5GHz processor
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Answer
A single core 2.5GHz processor means that the CPU has only one core to execute processes, operating at a speed of 2.5 billion cycles per second.
Step 4
Identify two registers used in Von Neumann architecture
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