Thursday, February 9, 2012

Explain Different Types of User Interface

What is a User Interface? Explain its types.

User Interface


User Interface is the set of items on screen to interact with the computer. A user interacts and uses computer with the help of these items. For example, Windows Desktop is an example of user interface. Similarly Dos Prompt is also an example of user interface.

Types of User Interface

There are two main types of user interface:
1) Graphical user interface (GUI)
2) Command line user interface (CLI)

1) Graphical User Interface

Graphical user interface or GUI provides different graphical items like windows, menus, tool bars and icons etc. A mouse or any other pointing device is used to work with these items. Commonly we select different commands from menu or toolbar with the help of mouse. We need not to type commands. We can double click on a file or folder to open it. We can double click on a shortcut to open a program. GUI is very easy to interact the computer.
All versions of Windows, Macintosh, OS/2 and some versions of Unix and Linux provide GUI.

Explain types of user interface GUI and CLI
Explain types of user interface GUI and CLI


Advantages of GUI - Graphical User Interface:

a) Easy to learn: It is very easy to learn even for beginners or ediots :D
b) Easy to use: GUI based systems are very easy to use becaus of icons, shortcuts, toolbars and menues etc.
c) Use of mouse: Since, we use mouse to select any command from a menue or toolbar, so we feel easier to work on computer.
d) Less typing: There is a very less need of typing commands in a GUI based software. Mostly, you are to point and select commands with mouse.
e) No need to memorize syntax of commands: Syntax is the way of writing that is typing a command so that computer can understand and execute it. Since, in GUI we use mouse button clicks, we need not to memorize command syntax.

2) Command line user interface (CLI)


Types of User Interface - Command Line Interface CLI
Types of User Interface - Command Line Interface CLI

A command-line interface provides a prompt / place where user types commands for execution. CLI interface is difficult to learn and use. We have to memorize commands. Operating system will not execute the command if there is a small error in typing the command. Dos and some versions of UNIX and Linux provide command-line interface. CLI is character based or textual interface.

Friday, February 3, 2012

Explain Different Types Of Operating Systems with Examples

Topic: Explain Different Types Of Operating Systems with Examples

Q. Explain different types of operating system

What is an Operating system or OS

The operating system is the most important program that runs on a computer. Every general-purpose computer must have an operating system to run other programs and applications. The Operating system or OS provides the base on which other programs and applications are installed and executed . Operating systems perform basic tasks in computer systems, like:

Basic Functions of Operating System

  • Providing the user interface
  • Receiving the input from the keyboard,
  • Sending  the output to the monitor screen, 
  • Keeping track of files and folders on the disk,
  • and controlling the functions of peripheral devices such as printers, etc.
Different Types of Operating Systems With Examples in Detail
Different Types of Operating Systems With Examples in Detail

Different types of operating system with examples

Following are different types of operating system with examples:



Explain different types of operating systems
Explain different types of operating systems

1) Single User Operating system

An operating system that allows a single person to use or access a computer at a time is called single user operating system.

Examples of Sinlge User Operating System


For example, DOS and Windows 95 are single user operating systems.

2) Multiuser Operating System

An operating system that allows more than one user to access a computer at a time is called multi user operating system.

Examples of Sinlge Multiuser Operating System

For example Unix, Linux, Windows 2000 server

What are different types of operating systems with examples

3) Single Tasking operating system

An operating system that allows the user to perform only one task at a time is called single tasking operating system.

Examples of Sinlge Tasking Operating System



For example, DOS is a single tasking operating system. In DOS, you can type and execute only one instruction at a time. you cannot use another command untill the first command is completed.

What are examples of different types of OS

4) Multi Tasking operating system


An operating system that allows the user to perform more than one tasks at a time is called single tasking operating system.

Examples of Multi Tasking Operating System


For example Windows, Unix, Linux are multi tasking operating systems. In MS Windows we can perform many tasks at the same time. For example, we can type some letter in MS Word while listening music in an audio player software at the same time.



5) Stand Alone operating system

An operating system that works on a desktop or notebook computer is called standalone operating system,

Examples of Stand Alone operating system


for example DOS, Windows 2000 professional etc

6) Client operating system

A stand-alone operating system that works with a network operating system is called client operating system. e.g. Windows 2000 professional, Windows NT workstation

7) Network operating system


An operating system that supports network is called network operating system. It normally works on a server. Some examples of network operating system are Windows NT Server, Windows 2000 Server, UNIX, and Linux etc.

8) Real Time operating system


A real time operating system is a very fast operating system. It responds to a certain input extremely quickly.

Examples of Real Time operating system

Real time operating systems are needed to run medical diagnostic devices, machinery and industrial systems.

Some common examples of real time operating systems include:

  1.  Air Traffic Control Systems, 
  2. Command Control Systems and
  3. Networked Multimedia Systems.
  4. Real time OS for Medical diagnostic devices
  5. Real Time operating systems to run ATM machines
  6. Medical devices, machinery, life support system use Real time operating systems

9) Time sharing operating system


A time sharing operating system is an operating system in which many users can execute their tasks nearly simultaneously. Operating system allocates a very small time period to each task. All tasks share CPU time. CPU executes each task for a very small time period turn by turn. CPU is so fast that all users think that CPU is doing their task.

Operating system uses CPU scheduling and multiprogramming to provide each user with a
small portion of a time. Computer systems that were designed primarily as batch systems
have been modified to time-sharing systems.
Advantages of Timesharing operating systems are following
• Provide advantage of quick response.
• Avoids duplication of software.