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19 Cards in this Set
- Front
- Back
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What does CPU stands for? What does it do.?
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It's stands for Central Processor Unit and is the brain of the computer. Sometimes they called it in the simply way as "processor" |
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Describe what is meant by "fetch-decode-execute" cycle? |
The job of the processor is to fetch (bring) the first instruction in its memory that makes up a program (e.g word, messenger). One it has fetched and instruction, then it has to decide what to do with it and its called decoding. Finally, it carries out the instruction know as (executing). |
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Describe with an example what the differences is between an arithmetic and a Boolean instruction. |
There are a range of instructions that might be executed. Some of them do arithmetic jobs like adding and subtracting numbers. Other instructions might be use something called Boolean logic (AND, OR and NOT for example) |
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Does the CPU fetch instructions from RAM or the hard drive.? |
When you start a program, usually by double-clicking on it icon on the desktop, a copy copy of the program is moved into the computers main memory, otherwise know as RAM (Random Access Memory). So the CPU fetch the instruction from the RAM.
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What does the RAM stands for.? |
Its stands for Random Access Memory |
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What is meant by "Immediate Access Storage"? |
Is meant primary memory. Is where the CPU holds all data and instructions that is currently use. |
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State two example of secondary storage devices. |
Some of examples are USB, floppy disk, magnetic tape etc. |
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What units are CPU clock speeds given in.? |
Is 4 Gigahertz |
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What is the main difference between "cache" and "RAM" ? |
Cache is like RAM but much more faster to read from and write to compared to RAM. |
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How many processors does a dual-core CPU have.? |
Its has two CPU. Two brains is better than one! Both brains can be working on different parts of program at the same time. |
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Why is "word size" important in a CPU.? |
The bigger the word size the better the CPU performance will be. |
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Explain why computer use binary? |
Because it has only two switches on and off (0 and 1) |
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What is meant by "denary numbering system"? |
There are ten digits in use. These are from 0 to 9. We know that symbol 7 is worth more than the symbol 3. It i a position of each digit relative to any other digits in number. |
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Apart a size of a digit, what else is important in determining how much a digit is worth? |
Is the place value for the digit. |
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What the RAM used for.? |
It used to store the programs and files it is using at the moment. All your programs and files are stored on hard disk but the ones that are open that are being used at the moment have a copy in the RAM. |
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Explain how the CPU, RAM and secondary storage work together to tun programs. |
all your programs and files are stored on your hard drive but the ones that are open, that are being used at the moment, have a copy in RAM, so the CPU can access them. |
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What is meant by "booting up" a computer.? |
Is meant to starting up computer and loading up everything. |
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Describe what jobs the ROM does. |
*It checks that the computer hardware is all present and working correctly when you power up a computer system
*it helps the computer copy the operating system from the hard drive to RAM, so that computer can be used. |
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What are the key differences between RAM and ROM.? |
* The RAM is volatile. and the ROM is non-volatile. *You can read and write the RAM but the ROM you can only read. |
