AS computing 2011 July Batch

[Ravichandran]

Dear all,

            Welcome to AS computing class. I am Dr.Ravi your facilitator for this course. This course consists of two modules, theory and practicals. In theory we will have 12 chapters and in practicals we do have programming classes. You will sit for theory and practical exams at the end of the course, which is conducted by CIE.

All the best, keep moving, for there is always a helping hand above you to guide you.

Dr.Ravi

 

[Ahmad Syahmi Irfan]

Afifah Ahmad said:

can i know te difference between system software and operating system?

Muhammad Mujahid Lokman said:

System software is a computer software designed to operate the computer hardware and to provide a platform for running application software

Asyraf Naim bin Jamal Shahid said:

On my opinion, System software refers to the files and programs that make up your computer's operating system. What about others ?

Afifah Ahmad said:

what's a system software? i think my notes on software are not complete

System software is a computer software designed to operate the computer hardware and to provide a platform for running application software i think.

[3uxiax8uu3t9h]

"An operating system is a system software", it explains that there is no difference between operating system and system software. an operating system is one type of system software. What do you think ?

Afifah Ahmad said:

can i know te difference between system software and operating system?

Muhammad Mujahid Lokman said:

System software is a computer software designed to operate the computer hardware and to provide a platform for running application software

Asyraf Naim bin Jamal Shahid said:

On my opinion, System software refers to the files and programs that make up your computer's operating system. What about others ?

Afifah Ahmad said:

what's a system software? i think my notes on software are not complete

[0bptstdyzz21j]

utility programs are extra  routing programs added to the operating system.

 

[Mohamed Faiz bin Mohamed Razali]

I learned yesterday about data structures. In a file or a database, there are records and in records are a group of fields which have many types such as boolean, text, numeric, date and currency. and yesterday, i was also learned the five major parts in a computer which are the input, the output, the ALU, the control unit and the memory unit. In the memory unit we learned that the RAM is a volatile memory where after the computer is turned off, the data is gone!  GUYS, is it right that the CPU sends an interrupted to the Hard Disk to send data to the buffer when it is almost empty and when the disk is full the CPU send another interupt to ask it stop? then, after the CPU processes the data, it sends another interupt to ask the hard disk to send more data?

[Dain Razali]

Most devices such as printers come with buffers. Buffers are usually at places where there is a difference between the transfer speed of 2 devices( where 1 is slower of faster than the other). One example of the use of a buffer is during data transfer from the Primary Memory ( Random Access Memory-RAM) to the Secondary Memory a.k.a Secondary Storage ( ROM ) and vice versa. For example, when we open a file in the computer, the operating system finds the data needed extracts it from the secondary storage. Since the transfer speed of secondary storage devices are extremely slow compared with that of the processor, the data is sent to the buffer while the processor carries on with other work to ensure the computer runs more efficiently. This is because if the data is sent from the secondary storage directly to the processor, the processor has to extract the data at the same speed as the secondary storage and is not free to do anything else. Hence, the buffer eliminates this problem. Once the buffer is full, it sends an 'interrupt signal' to the CPU (processor) to inform it that it is ready to transfer the data. Therefore, the data is then sent to the CPU at the same speed(speed of the processor) from the buffer and the CPU sends it to the RAM to be used. The buffer works the same the other way round too, where data from the RAM is sent to the CPU which transfers it to the buffer, and then the buffer saves it in the secondary storage. I hope I got it right... :/

Afifah Ahmad said:

hmm wat we learned yesterday was about utility programs, software, buffer, RAM, ROM (if i 4get 2 add anything pliz add it up ok)

utility programs 

-extra routines that are added to the operating system

-system programs are counted as utility

 

application software

-designed for specific tasks

-application packages = designed for specific tasks with user manual included

-tailor-made software = designed for specific users

-general purpose packages = for general purposes

 

integrated software

-consists of several parts and data can be shared between the application package

e.g. in microsoft office, when we use word, we can share the datas there into excel & powerpoint, but we cannot share the datas with adobe or notepad

 

SOMEONE UPDATE ABOUT BUFFER, ROM and RAM ok? 

 

[Mohamed Faiz bin Mohamed Razali]

a database full of records is a file

Asyraf Naim bin Jamal Shahid said:

We have learned that record is the collection of files. can anyone give me examples of a FILE ?

[Afifah Ahmad]

can u give me examples of systems software, apps software and operating systems mujahid? so that i can see a clearer picture

Muhammad Mujahid Lokman said:

You would use an operating system on your pc/laptop to run all the processes and manage all the hardware and resources contained in your unit, also to manage the applications you have installed there.. whereas you would have system software or application software to sit on top of your OS to manage you day to day emailing, word processing, faxing, photos, music downloads etc...

Read more: http://wiki.answers.com/Q/What_is_the_difference_between_system_sof...

Afifah Ahmad said:

can i know te difference between system software and operating system?

Muhammad Mujahid Lokman said:

System software is a computer software designed to operate the computer hardware and to provide a platform for running application software

Asyraf Naim bin Jamal Shahid said:

On my opinion, System software refers to the files and programs that make up your computer's operating system. What about others ?

Afifah Ahmad said:

what's a system software? i think my notes on software are not complete

[3uxiax8uu3t9h]

What is string data type ? what is the example ?

[Mohamed Faiz bin Mohamed Razali]

The buffer sends an interupt to ask for more data and to ask to stop sending data right?

Dain Razali said:

Most devices such as printers come with buffers. Buffers are usually at places where there is a difference between the transfer speed of 2 devices( where 1 is slower of faster than the other). One example of the use of a buffer is during data transfer from the Primary Memory ( Random Access Memory-RAM) to the Secondary Memory a.k.a Secondary Storage ( ROM ) and vice versa. For example, when we open a file in the computer, the operating system finds the data needed extracts it from the secondary storage. Since the transfer speed of secondary storage devices are extremely slow compared with that of the processor, the data is sent to the buffer while the processor carries on with other work to ensure the computer runs more efficiently. This is because if the data is sent from the secondary storage directly to the processor, the processor has to extract the data at the same speed as the secondary storage and is not free to do anything else. Hence, the buffer eliminates this problem. Once the buffer is full, it sends an 'interrupt signal' to the CPU (processor) to inform it that it is ready to transfer the data. Therefore, the data is then sent to the CPU at the same speed(speed of the processor) from the buffer and the CPU sends it to the RAM to be used. The buffer works the same the other way round too, where data from the RAM is sent to the CPU which transfers it to the buffer, and then the buffer saves it in the secondary storage. I hope I got it right... :/

Afifah Ahmad said:

hmm wat we learned yesterday was about utility programs, software, buffer, RAM, ROM (if i 4get 2 add anything pliz add it up ok)

utility programs 

-extra routines that are added to the operating system

-system programs are counted as utility

 

application software

-designed for specific tasks

-application packages = designed for specific tasks with user manual included

-tailor-made software = designed for specific users

-general purpose packages = for general purposes

 

integrated software

-consists of several parts and data can be shared between the application package

e.g. in microsoft office, when we use word, we can share the datas there into excel & powerpoint, but we cannot share the datas with adobe or notepad

 

SOMEONE UPDATE ABOUT BUFFER, ROM and RAM ok? 

 

[Azrin Syaqir]

input devices-magnetic ink character recognition...
Nadia Nadhira Airisal said:

Input devices =
Input devices are different pieces of hardware that are used to transfer data from the user to the processor 

Example of input devices =
mouse, keyboard, joystick , etc.

 

Output devices =
Output devices are any piece of computer hardware equipment used to transfer data from the processor to the user 

Examples = monitor, printer , speakers

 

Anything else to add ? 

 

[3uxiax8uu3t9h]

Operating system is a type of software which is responsible for interacting with the user of the computer like microsoft windows XP,microsoft windows 98,microsoft windows vista and the latest WINDOW7..

Afifah Ahmad said:

can u give me examples of systems software, apps software and operating systems mujahid? so that i can see a clearer picture

Muhammad Mujahid Lokman said:

You would use an operating system on your pc/laptop to run all the processes and manage all the hardware and resources contained in your unit, also to manage the applications you have installed there.. whereas you would have system software or application software to sit on top of your OS to manage you day to day emailing, word processing, faxing, photos, music downloads etc...

Read more: http://wiki.answers.com/Q/What_is_the_difference_between_system_sof...

Afifah Ahmad said:

can i know te difference between system software and operating system?

Muhammad Mujahid Lokman said:

System software is a computer software designed to operate the computer hardware and to provide a platform for running application software

Asyraf Naim bin Jamal Shahid said:

On my opinion, System software refers to the files and programs that make up your computer's operating system. What about others ?

Afifah Ahmad said:

what's a system software? i think my notes on software are not complete

[Afifah Ahmad]

extra routine

Raj Kumaran Kalidas said:

utility programs are extra  routing programs added to the operating system.