1) Accept the data and instructions from the outside world.
2) Convert it to a form that the computer can understand.
3) Supply the converted data to the computer system for further processing.
Storage Unit:The storage unit of the computer holds data and instructions that are entered through the input unit, before they are processed. It preserves the intermediate and final results before these are sent to the output devices. It also saves the data for the later use.
Types of Storage Devices:
1. Primary Storage:
1. Stores and provides very fast.
2. This memory is generally used to hold the program being currently executed in the computer, the data being received from the input unit, the intermediate and final results of the program.
3. The primary memory is temporary in nature. The data is lost, when the computer is switched off.
4. In order to store the data permanently, the data has to be transferred to the secondary memory. The cost of the primary storage is more compared to the secondary storage.
2. Secondary Storage:1. It stores several programs, documents, data bases etc.
2. The programs that run on the computer are first transferred to the primary memory before it is actually run.
3. Whenever the results are saved, again they get stored in the secondary memory.
4. The secondary memory is slower and cheaper than the primary memory. Some of the commonly used secondary memory devices are Hard disk, CD, etc.
Memory Size:
All digital computers use the binary system, i.e. 0s and 1s. Each character or a number is represented by an 8 bit code. The set of 8 bits is called a byte. A Character occupies 1 byte space. A numeric occupies 2 byte space. Byte is the space occupied in the memory. The size of the primary storage is specified in KB (Kilobytes) or MB (Megabyte). One KB is equal to 1024 bytes and one MB is equal to 1000KB. The size of the primary storage in a typical PC usually starts at 16MB. PCs having 32 MB, 48MB, 128 MB, 256MB memory are quite common.
Arithmetic Logical Unit:All calculations are performed in the Arithmetic Logic Unit (ALU) of the computer. It also does comparison and takes decision. The ALU can perform basic operations such as addition, subtraction, multiplication, division, etc and does logic operations viz >, <, = etc.
Whenever calculations are required, the control unit transfers the data from storage unit to ALU once the computations are done, the results are transferred to the storage unit by the control unit and then it is send to the output unit for displaying results.
Output Unit:The output unit of a computer provides the information and results of a computation to outside world. Printers, Visual Display Unit (VDU) are the commonly used output devices. Other commonly used output devices are floppy disk drive, hard disk drive, and magnetic tape drive.
Control Unit:
It controls all other units in the computer. The control unit instructs the input unit, where to store the data after receiving it from the user. It controls the flow of data and instructions from the storage unit to ALU. It also controls the flow of results from the ALU to the storage unit. The control unit is generally referred as the central nervous system of the computer that control and synchronizes its working.
Central Processing Unit:The control unit and ALU of the computer are together known as the Central Processing Unit (CPU). The CPU is like brain performs the following functions:
1) It performs all calculations.
2) It takes all decisions.
3) It controls all units of the computer.
A PC may have CPU-IC such as Intel 8088, 80286, 80386, 80486, Celeron, Pentium, Pentium Pro, Pentium II, Pentium III, Pentium IV, Dual Core, and AMD etc.
draw a neat diagram of computer
Okay theres a key combination you have to press when you first turn the computer on. Compaq changes theres from system to system, but it may be one of these. F10 alt-F10 F1 alt-F1 F2 alt-F2 and so on... A neat little trick that works on a lot of compaqs is this. Open up your case (with the power off of course) and unplug the ribbon cable from the back of the floppy drive. When the system boots, it will give an error message & kindly ask if youd like to enter BIOS (or setup menu) When youre done, dont forget to shut down & plug the cable back in.
Ah, inside the computer laboratory, there are some gentle rules to follow to keep everything running smoothly. Remember to treat the equipment with care and respect, keep noise levels low to help others concentrate, and always ask for help if you need it. Just like painting a happy little tree, following these rules will create a peaceful and harmonious environment for everyone to enjoy.
I'd say that..everything around depend on printer as essintial thing .. you can't study without it ....I know that e-book now become everything ..but we can't take out the paper as source of reading
Users can backup and download emails from more than 100 +email services using ZOOK Email Backup Software. The tool enables you to save your email backup from your email account into 30+ saving options. Emails can be easily downloaded to file formats, webmail, and cloud-based email accounts. It offers to export emails from email account to PST, EML, MSG, MBOX, EMLX, CSV, PDF, ZIP, DOCX, MHT, RTF, Windows Live Mail, Lotus Notes, Thunderbird, Yahoo, G Suite, Exchange Server, IMAP, Zimbra, Rediffmail, IBM Verse, Amazon WorkMail, IceWarp, etc.
draw a neat diagram of computer
This is not possible, we can only use text.
Explain the construction details of DC Machine with neat diagram?
The imporance of this model is that it allows for communication beween the customer and the software developer and specifis what,when the product will be delivered,and at what cost.
With a neat diagram explain the structure of a microcomputer
errjklerjqlwrjqwewqerlkwrlqewlrkqwerqewrqwklrjqweklodo tari ma no chodu
What are the defects in a crystal? Describe them with a neat diagram
neat diagram
The basic organisation of computer includes, 1.Control Unit2.Central Processing Unita)Control Unitb)Arithmetic and Logical Unitc)Memory Unit*Primary Storage*Secondary Storage3.Output Unit
With a neat diagram explain the architecture of .NET framework.
Meggar is a hand driven tool for measuring insulation resistance and earth resistance.
the uglys book is a good reference ,call the manufacture or go on line to find a manual