Unit 3-operating system

UNIT3. OPERATING SYSTEM.

3.1. SOFTWARE AND OPERATING SYSTEMS. 

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Software is the set of programs or instructions that start up the computer and process data so tha we can use it.
The instructions in the programs are written in programing languages. There are several types of programs. Each one performs a specific function:

• A) OPERATING SYSTEMS. This is the core program that tells the computer how it should perform all its basic funcions, eg. displaying the character on the screen, printing information or recording information on a disc. It enables the comunication between the hardware and the the programs with the user, therefore it is an ``interfaz``.  The OS is loaded from the HD and stored in the RAM memory, where it remains until the computer is turned off. Nowdays you can open different windows and work with several files and programs at the same time (it is called Multi-Task System). Another type of operating system is the LINUX, it can be used, improved and shared at no cost.

• B) APPLICATION. An office software suite is the group of programs used to organise, store and process data, as well as trnansmit information. The mos frequently programs are word, spreadsheets, database management systems and presentations programs (e.g. the programs that belong to the Microsoft Office Package).

•  MULTIMEDIA PROGRAMS to process text, images, animation, sound, etc. 

• PROGRAMING LANGUAGES to create another programs and applications: Java, C++, VisualBasic, etc.

ACTIVITY Nº1.

a) Do you think it is possible to run a program on a computer without an operating system? Give reasons about your answer.

I think it is impossible to use a computer without an operating system will not work because the basic parts of the computer and the computer but probably can be turned to bad functioning or work or perhaps

b) List four or more types of operating systems?

Canaima: Venezuelan system is made ​​to meet the computing needs of the end users of the National Public Administration (APN) Venezolana

Microsoft Windows: is the name of a family of operating systems developed and sold by Microsoft
IOS
ANDROIDc) What are the items that you can see on the desktop (eg.icons)?
RECYCLE BIN
MOZILLA FIREFOX

GOOGLE CHROME
d) How many computer icons do you know? 

e) Make a table where you can compare the aplications of the Windows Office Package with the Open Office Package.

f) Make a table where you can compare the differences between the Windows OS and the Linux OS.

ACTIVITY Nº2. 
a) What´s MATRIX? Is it a program or a machine? Explain it.
Matrix is a program that takes care to detect potential problems that may occur in the implementation of a system

b) Write down 3 features of an Operative System.

1.-supply of the user interface

2. - Resource Management

3. - File Management

c) Write down one example of an “Operative Multi-Task System”.

A multithreaded or multitasking operating system is one that allows you to run multiple processes concurrently, the reason is because now our CPUs can only run one process at a time. The only way to run multiple processes simultaneously is to have several CPUs (either on a machine or several, in a distributed system).

The magic of a multithreaded operating system resides in the operation called context switching. This operation involves removing a CPU process, run another process and replace the first without him noticing anything.

Multitasking Types:

cooperative

User processes are those who give the CPU to the operating system at regular intervals. Very problematic, because if the user process is interrupted and does not yield the CPU to the operating system, the entire system will be locked, ie helplessly. Latencies also results in very irregular, and the inability to consider this scheme in real-time operating systems. An example would be Windows Version 2000

d) Describe the differences between an Operative System of Commands and one of Graphics Interface.

The OS no graphics for the most part are for servers as it takes the graphical resources on a server and that is something important and really do not need a graphic environment but you can upload one if necessary.

ACTIVITY Nº3:
PRACTICE WITH YOUR COMPUTER DOING THE FOLLOWING TASKS, WRITE DOWN THE RESULT ON YOUR BLOG.
3.1.Change the date of your computer and create a folder. Change back the correct date and create another folder. Check the difference between both dates.
3.2. Look at the menu “start>program” the application for the calculator and open it. Work on it with the following examples: 
A) Square root of 9; 
b) (25+7)*15
c) Binary of 25
3.3. Find out in “start>my PC>properties” the features of your gear:
a) Size of the Hard Disk
b) Capacity of the RAM Memory.
c) Type of Operating System.
d) Type of microprocessor.
e) Speed of microprocessor.
f) Name of your PC.
g) Name of your NET.
3.4. Change the “background” of your desk top with another image of Windows.
3.5. Check the last files that exist in your computer:  C:\Documents and Setting\User\Recent
3.6. Open a folder and show the files in order: first by name and then by modification date.
3.7. Create a file with the text processor, erase it and then recover it using the “Recycle bin”
3.8. Go to the “Recycle bin “and erase a file permanently (be careful in this operation)
3.9. Check in your computer how many users there are.
3.10. Find out what IP your computer has. Go to “start>accessories>Symbol of the system” and type IPCONFIG.

3.11. Find out how many printers your computer has:  “start>control panel”
3.12. Look at the meaning of “IP address” in Wikipedia. Copy the text and paste it on a new document of MS-Word.
a) Select the whole text and format it with “ARIAL” font, and size “14”.
b) Align the paragraph in the center.
c) Set automatic number to the different paragraphs.  
d) Look at “IP address” in the GOOGLE IMAGE SEARCH and copy it on the document.
3.13. Save the previous document with the name IP and compress it using WinRAR (or WinZip).Check the size of the document before and after the compression.
3.14. Create a backup of the compressed document in your USB memory.
3.15. Look for the MS-DOS into your computer and describe what are doing the following when you type it: DIR, TREE, MEM
3.16.  Find out and write down in your blog the extensions of the program´s files: MS-PAINT and MS-WORD.
3.17. Find out the compressor programs there are and write down the extension of their files.