A+ Certification may be obtained by passing A+
Essentials exam, and A+ Practical Applications exam Note that a candidate
needs to pass both the exams to obtain the certification. Linux is not
included in the A+ Certification exam, as it has an exam of
its own (Linux+ Certification), offered by CompTIA. A brief notes on important
concepts of A+ Certification Operating Systems is given in the following sections.
With the latest release of A+ objectives, several topics in Windows Vista,
Windows 7, Wireless networking and Security have been added.
1.2 Major system files, and their purpose
1.3 Frequently used command line functions
1.4 Creating and Managing Disks, Directories, and Files
1.5 Some Operating System Utilities
The registry contains extended information, settings and various other
values for the the Microsoft Windows 9x, Windows 2000, Windows XP and other
Windows Operating Systems. The tool is recommended to be used by experienced
technicians, as inappropriate use may lead to unforeseen problems such as
boot failure, etc. Before going into the Registry and changing or deleting
anything, it is recommend that you backup os the registry.
The computer registry consists of two files hidden in the Windows
directory, system.dat and user.dat. User-specific system information is
contained in the user.dat file and Computer and Hardware specific
information in the system.dat file.
To get into the Windows 9X registry, click Start / Run / type
You will get the screen shown below, known as the Registry editor.
Defines the standard class objects used by Windows 9x/2000.
Stores the current user setting.
HKEY_USERS: Stores all of
the personalization information for all users on a PC.
is where the information specific to the machine will be stored. The
information may include, network settings, hardware drivers etc.
This is used if the values in HKEY_LOCAL MACHINE have more than one hardware
options. This is normally not used for PCs that do not have multiple
HKEY_DYN_DATA: This is registry data stored
in RAM to speedup system configuration.
In Windows 2000, you
have two ways of editing Registry. One by using the program Regedit, and the
other using Regdt32.
This is a method of
using the computer hard disk drive to provide additional memory space for
the computer. Memory segments are stored on the hard disk drive known as
pages. When a segment of memory is requested that is not in the main memory,
it is moved from the virtual memory to an actual memory address.
This is a method
of organizing and retrieving files from a storage medium such as a hard
drive or Flash Drive. File systems usually consist directories, and files.
Directories may contain files or additional directories.
FAT (File Allocation Table): FAT is a method used by Microsoft operating
systems to keep track of the contents of a disk.
- Windows 98 and Windows 95 OEM Release 2 support FAT32. Note that
Windows NT does not support FAT32. NT supports only FAT16 and NTFS.
- Windows 2000 supports FAT16, FAT32, and
- DOS standard FAT16 support drives up to 2 GB. FAT32 supports drives up
to 2TB (Terabytes).
NTFS: Windows NT, Windows 2000, Windows XP operating system support NTFS
file system. NTFS has better directory/file level security features compared
Windows Explorer is used in Microsoft Windows 9x, Winows
2000, XP, and above to explore and manage the files on the computer drives.
Microsoft Internet Explorer is different for Windows Explorer. Microsoft IE
is basically used for exploring WorldWideWeb, whereas the Windows Explorer
is used for exploring computer resources. Both are often confused for each
My Computer allows the user to explore the contents of the
computer drives as well as manage their computer files. Though it looks very
similar to Windows Explorer, it is different from Windows Explorer. In Windows
Vista, it is called just "Computer:.
The control panel allows the user to add/remove hardware,
software, or configure display, and several other functions. It is available
in all versions of Windows software starting from Windows 9x and above. The
figure below gives a snapshot of the Control Panel.
Microsoft Windows Computer management window allows users to
see multiple categories at once, and manage. Windows 2000 Computer
Management Console is shown below:
- Allows for issuing commands from a DOS
- Enables a
user to explore networked computers. This tool is useful when working in a
-Commonly located at the bottom of
Microsoft Windows 9x, Windows NT, Windows 2000, Windows ME, Windows XP
operating systems and displays the programs that are currently running. This
bar also displays the time, systray, and the Quick Launch icons. A typical
task bar is given below:
- Allows users to access their computer
programs or configure Microsoft Windows easily. A snapshot of start menu for
Windows 2000 OS is shown below:
The start menu is the most frequently used menu in any
Windows computer. Important menu items include Programs, Documents,
Settings, and Search.