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What are supercomputers?
What are supercomputers?
The most powerful computers available. They use the best processing speed possible and are measured in FLOPS (FLOating Point operations per Second) In 2016 the Chinese Sunway TaihuLigh was the fastest at 93PFLOPS. These are used by weather bureaus, earthquake simulation and more. The most expensive in cost.
What are mainframe computers?
What are mainframe computers?
Powerful computers designed specifically to process transactions as reliably as possible. Commonly used by very large businesses like banks and airlines. The second most expensive in cost.
What are mini-computers?
What are mini-computers?
Large computers that can have up to 250 connections. Used in large business. Not designed for a single user. The third most expensive in cost.
What are microcomputers?
What are microcomputers?
Computers for common use. Desktops, laptops, tablets, smartphone, smart watches and others with microchips. The fourth most expensive in cost.
What do all these computing devices have in common?
What do all these computing devices have in common?
They all have one or more central processing units (CPUs). They also all have memory.
For these 4 types of devices. What is the order from highest to lowest in cost?
For these 4 types of devices. What is the order from highest to lowest in cost?
Supercomputers. Mainframes. Minicomputers. Microcomputers.
hardware - CPU
What is distributed processing?
What is distributed processing?
It is using more than one CPU or computer, to run a program.
What is sequential processing?
What is sequential processing?
It is running processes one after the after in a single processor.
What is parallel processing?
What is parallel processing?
It is using two or more CPUs in a computer, to run programs at the same time.
What is multicore processing?
What is multicore processing?
It is a single multicore processor with two or more processing cores. These cores can run at the same time.
Name 6 components of the CPU
Name 6 components of the CPU
Arithmetic Logic Unit (ALU), Control Unit (CU), registers, program counter, system clock, buses of 3 types;address bus, control bus and data bus.
What are the steps in the fetch-execute cycle? Including the correct order.
What are the steps in the fetch-execute cycle? Including the correct order.
1.Fetch. 2. Decode. 3. Execute. 4.(if needed) Store.
hardware - memory
What is computer memory?
What is computer memory?
It is storage locations for the computer. eg in the CPU, on the motherboard, USB or the cloud.
What are the two categories of memory?
What are the two categories of memory?
Permanent memory like on the hard drive (called secondary memory). Temporary memory like in the CPU and RAM which is lost if the device is turned off and not saved. (this is called primary memory)
Name primary memory items.
Name primary memory items.
These are inside the computer. RAM is one type and cache is another type.
Name secondary memory items.
Name secondary memory items.
Hard disk drive (HDD). Solid State Drive (SSD), Universal Serial Bus (USB).
What is a mechanical disk?
What is a mechanical disk?
It is a storage disk with moving parts. A hard disk drive is an example.
How is memory measured? What is the size from smallest to largest?
How is memory measured? What is the size from smallest to largest?
It is measured in bits. From smallest to largest it is ... bit, byte, kilobyte, megabyte, gigabyte, terabyte, petabyte
hardware - input output specs
What are input components?
What are input components?
Common input devices are keyboard, mouse, microphone, webcam (web camera), stylus, finger (for tablets)
What are output components?
What are output components?
monitor, printer, speaker, earphones, headphones, projector.
What happens between input and output?
What happens between input and output?
After data from the keyboard enters the computer, it is processed by the central processing unit. Answer is processing.
What are common processor architectures for smartphone devices?
What are common processor architectures for smartphone devices?
ARM and x86
What are common processor architectures for desktop devices?
What are common processor architectures for desktop devices?
x86
What are the most common CPU brands available?
What are the most common CPU brands available?
intel core i7, AMD-FX6300, Pentium G4620 and Atom (low budget)
hardware - troubleshooting
What is troubleshooting for computing faults?
What is troubleshooting for computing faults?
It is following a checklist or sequence to correct a fault on a computer.
If the problem is software related, what do you do first to try to fix it.
If the problem is software related, what do you do first to try to fix it.
Always reboot the computer first. This reloads the operating system and may fix the problem.
On a desktop computer.. How do you diagnose a fault if there are no lights on the computer?
On a desktop computer.. How do you diagnose a fault if there are no lights on the computer?
Check power. At power outlet first, is it on? Is computer plugged in (both ends of the cable)? Is computer and monitor turned on?
For software fault, what should we do about the error messages?
For software fault, what should we do about the error messages?
Always read the error message, follow it if you can, and if not make note of the message should technicians be able to help you.
The internet won't work on your home desktop computer. What steps do you take to fix it?
The internet won't work on your home desktop computer. What steps do you take to fix it?
1. Reboot the computer. If internet still not working, then 2. Check router lights are working, if router lights are not red, then call a technician noting any error messages.
Why should we document troubleshooting procedures?
Why should we document troubleshooting procedures?
To refer to when faults happen. This is so the computer keeps on working. Each new fault should be written down and its solution should also be written down.
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