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Computer science
Abi Wright
Flashcards by Abi Wright, updated more than 1 year ago
Abi Wright
Created by Abi Wright almost 5 years ago
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Question Answer
What does CPU stand for?
Image: Cpu (binary/octet-stream)
Central Processing Unit
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What is the purpose of the CPU?
Image: Cpu (binary/octet-stream)
To process data and instructions. To fetch, decode and execute program instructions.
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What does RAM stand for?
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Random Access Memory
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What does ROM stand for?
Image: Jmi Telescopes Ngcrom Rom Chip Upgrade Ngc Max 1070126 (image/jpeg)
Read Only Memory
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What does RAM store?
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Data/instructions/software and files while they are in use.
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What does ROM store?
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The boot up sequence in a computer system.
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What is virtual memory?
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A part of the secondary storage (Hard drive) used as RAM.
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When is virtual memory needed?
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When RAM is full.
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What is the three step process used by the CPU?
Image: Recycling Symbol Icon Twotone Light Green (image/png)
Fetch - Decode - Execute
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Name one of the four registers in the CPU.
Image: Cpu (binary/octet-stream)
* Program counter * ALU * Control unit * General purpose registers
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What does ALU stand for?
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Arithmetic Logic Unit
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What are the five main units of memory?
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KB, MB, GB, TB, PB -kilobyte, megabyte, gigabyte, terabyte, petabyte
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Which mathematician is the architecture used in the CPU today named after?
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Von Neumann
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The CPU is sometimes referred to as the _____ of the computer.
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Brain
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What does MAR stand for?
Image: Confused Clipart Mum 1 (image/jpeg)
Memory Address Register
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What does MDR stand for?
Image: 437539 (image/png)
Memory Data Register
Image: Bright Left And Right Hemisphere Of Human Brain Vector Id509365378?K=6&M=509365378&S=612x612&W=0&H=Snr2326 Rt Nx1m By Wsahni9k H9s A Pfc217 M Fs Mjsej M= (image/jpeg)
What does MAR do?
Image: 362 3623237 Big Image Mum Clipart (image/png)
Holds the address of the instruction to be carried out.
Image: Bright Left And Right Hemisphere Of Human Brain Vector Id509365378?K=6&M=509365378&S=612x612&W=0&H=Snr2326 Rt Nx1m By Wsahni9k H9s A Pfc217 M Fs Mjsej M= (image/jpeg)
What does MDR do?
Image: 7113 (image/jpeg)
Holds the actual data/instruction to be carried out.
Image: Bright Left And Right Hemisphere Of Human Brain Vector Id509365378?K=6&M=509365378&S=612x612&W=0&H=Snr2326 Rt Nx1m By Wsahni9k H9s A Pfc217 M Fs Mjsej M= (image/jpeg)
What is the role of the accumulator?
Image: Aok Math (image/png)
Stores the results of calculations carried out the the ALU.
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State one advantage of SSDs.
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- Faster - Don't need defragmenting - More shock-proof - Silent
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State one advantage of HDDs.
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- Cheaper - High capacity - Longer read/write life
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