1. Internet- Internet is a global network of computer networks that enables information to be exchanged. In internet, most computers are not connected directly to the internet. Rather they are connected to smaller networks, which in turn are connected through gateways to the internet backbone. Internet is not governed by any particular body. It is coordinated by many volunteer organizations. 2. Advantages of Internet- • Greater access to information reduces research times. • Useful communication links • Global reach enables one to connect to anyone on the internet. • Easy communication with other people. • Publishing documents on the internet saves paper. 3. Disadvantages of Internet- • Cyber frauds may take place involving credit/debit card numbers and details. • Computer viruses get downloaded and spread across machines connected to networks and have detrimental effects. World Wide Web (WWW) - www is a set of progra...
1. Name any two popular operating systems? Ans1. Windows 7, Linux 2. What is operating system? Ans2. An operating system is a program, which acts as an interface between a user and the hardware (i.e. all computer resources). For eg. Windows 7, MS DOS etc. 3. Write the full forms a. MS DOS- Microsoft Disk Operating System b. MAC OS- Macintosh Operating System 4. Describe any two roles of an operating system? Ans4. Two roles of an operating system are 1. Program execution- The command interpreter is a part of any operating system. It receives the commands from any application or system program, interprets it and then executes it. 2. Providing user interface - A user interface refers to the way an operating system interacts with its users. An operating system has two parts: kernel and shell. The kernel is responsible for interacting with hardware and the shell is responsible for interacting with the user. The shell acts as the command interpre...
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