Chapter 3: Hardware and Software
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What is hardware
Hardware is the physical components of your PC
Examples of Hardware
Monitors cpu Printers mice webcams
example input devices
Keyboard mouse Switches Buttons
examples output devices
Monitors led lights printers speakers
What is an input devices
A input device is a device that takes a set of digital inputs and feeds it to a computer
What is an output devices
A output devices takes a set of inputs and creates an output
Name three sensors
Sound sensor Heat sensor Light level sensor distance sensor moisture sensor
what does a not gate look like?
what does a And gate look like
what does a or gate look like
what does a nand gate look like
what does nor gate look like
what does xor gate look like
What is a CPU and what is its role?
CPU (central processing unit) is responsible for processing all the instructions and data in a computer application
What are the features of von Neumann architecture?
» the concept of a central processing unit (CPU or processor) » the CPU was able to access the memory directly » computer memories could store programs as well as data » stored programs were made up of instructions which could be executed in sequential order.
What is this logic gate symbol?
AND
Is this a NOR or a XOR symbol?
NOR
examples of high level programming languages
Scratch, python JS, J
Examples of low levels language
Binary, assembly language
advantages and disadvantages of low level languages
advantages disadvantages You can make use of specific a chip .long and hard to understand uses less space cant be modified after its written
advantages and disadvantages of high level languages
Easier to read . uses more space you can debug and rewrite a program easily .needs a compiler
What are Translators
A program must be translated into binary for a computer to understand. this is done using translators.
What are compilers
A Compiler is a program that translates high-level language to machine code so it can execute its task.
What are interpreters
It is a program that reads a statement from a script and performed the action specified, then moves on to the following line.