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

 

[Ravichandran]

Dear Naj,

                 Wait for tomorrow, you will have the first class begin. Dr.Ravi

najwanuawi said:

Hi Dr. Ravi,

I hope I'll enjoy & learn a lot of new things in your class :)

Happy to know you Dr :D

 

[Ravichandran]

Hello guys, I hope today we had an interactive session in DOS. Can you please share what you have learnt in the class on DOS commands. Also can you list out the internal commands and external commands that you have learnt in the class.

Dr.Ravi

 

[3uxiax8uu3t9h]

Dr Ravi, why the name of windows is windows32 ? why 32 ?

[Muhammad Mujahid Lokman]

Once upon a time, back in the days of 16-bit Windows, there was a directory named C:\Windows\System. That was the last time things were simple.

With the introduction of Win32, there was a second system directory added named C:\Windows\System32. This second directory contained the 32-bit system files. The 16-bit system files remained in the old system directory. Well, except that on Windows 95, both 32-bit and 16-bit system files lived in the same directory, which retained its old name of C:\Windows\System. We shall not speak of Windows 95 again.

Batch files ran programs from C:\Windows\System32 with the expectation that the resulting program would match the native OS. These expectations were not explicit, but they were implied by the nature of the activity. If the System32 directory were filled with 32-bit programs, then a batch file that ran the C:\Windows\System32\REG.EXE program to upset a system registry setting would be running the 32-bit version of REG.EXE, which means that it would be updating the 32-bit simulated version of the registry instead of the real 64-bit version. Other types of scripting files (such as REG files) have the same problem.

There are quite a number of existing 32-bit programs that hard-code the System32 path rather than calling the GetSystemDirectory function. When these programs are recompiled for 64-bit Windows, they will still try to access the System32 directory, expecting to find 64-bit files (because the program is now compiled 64-bit). Paths written into configuration files or the registry need to be meaningful to both 32-bit and 64-bit processes, yet need to refer to the appropriate directory depending on the “bitness” of the program doing the asking.

Asyraf Naim bin Jamal Shahid said:

Dr Ravi, why the name of windows is windows32 ? why 32 ?

[Muhammad Mujahid Lokman]

Dr. Ravi, how do i hack? i want to hack so badly, can you teach me simple hacks? or by editing the php? :)

[Afifah Ahmad]

we have learnt today going to the command user interface,built-in memory which are command.com 10.sys and msDOS.sys which we cannot delete. we also learnt commands like cls, cd, dir, dir *.exe, dir *.exe/w

[Ravichandran]

Dear Mujahid,

 

32 usually stands for a 32 bit computer system. You know each data carried to the computers are in the form of bits and bytes. In other words in the form of 0's and 1's, which are also called binary digits.

Dr.Ravi

Muhammad Mujahid Lokman said:

Once upon a time, back in the days of 16-bit Windows, there was a directory named C:\Windows\System. That was the last time things were simple.

With the introduction of Win32, there was a second system directory added named C:\Windows\System32. This second directory contained the 32-bit system files. The 16-bit system files remained in the old system directory. Well, except that on Windows 95, both 32-bit and 16-bit system files lived in the same directory, which retained its old name of C:\Windows\System. We shall not speak of Windows 95 again.

Batch files ran programs from C:\Windows\System32 with the expectation that the resulting program would match the native OS. These expectations were not explicit, but they were implied by the nature of the activity. If the System32 directory were filled with 32-bit programs, then a batch file that ran the C:\Windows\System32\REG.EXE program to upset a system registry setting would be running the 32-bit version of REG.EXE, which means that it would be updating the 32-bit simulated version of the registry instead of the real 64-bit version. Other types of scripting files (such as REG files) have the same problem.

There are quite a number of existing 32-bit programs that hard-code the System32 path rather than calling the GetSystemDirectory function. When these programs are recompiled for 64-bit Windows, they will still try to access the System32 directory, expecting to find 64-bit files (because the program is now compiled 64-bit). Paths written into configuration files or the registry need to be meaningful to both 32-bit and 64-bit processes, yet need to refer to the appropriate directory depending on the “bitness” of the program doing the asking.

Asyraf Naim bin Jamal Shahid said:

Dr Ravi, why the name of windows is windows32 ? why 32 ?

[Ravichandran]

Hacking has two types. Legal and illegal. If its legal, sure I will be teaching in class some times. However, the illegal stuff, not in this campus.

Dr.Ravi

Muhammad Mujahid Lokman said:

Dr. Ravi, how do i hack? i want to hack so badly, can you teach me simple hacks? or by editing the php? :)

[27nuleigwgbiy]

Hello friends. What else can we do with commands?

[0bptstdyzz21j]

Hello Dr. Ravi. Can we install 2 windows in a single pc?.

[Dain Razali]

Dr. Ravi, what are some examples of legal hacking?

Ravichandran said:

Hacking has two types. Legal and illegal. If its legal, sure I will be teaching in class some times. However, the illegal stuff, not in this campus.

Dr.Ravi

Muhammad Mujahid Lokman said:

Dr. Ravi, how do i hack? i want to hack so badly, can you teach me simple hacks? or by editing the php? :)

[Ravichandran]

legal hacking is like Teamviewer, the one I showed you in the class.

Dr.Ravi