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2. How do you copy a file or folder using drag and drop method?
Ans. Follow the steps to copy a file or folder using drag and drop method:
● Select a file or a folder you wish to copy.
● Hold down the Ctrl key while dragging it to the new location. A Copy of the file is automatically created.
3. What do you mean by an operating system? Name a few.
Ans. Operating System is a System Software which is compulsory for the computer. Without an operating system, a computer
is just a machine with no usage. It works as a manager of the computer and helps you to utilize computer hardware in an
efficient manner. For example: Windows 10, DOS, Linux, Unix.
4. What is a Disk Operating System?
Ans. DOS is one of the oldest, text based, single user operating systems written originally by Tim Patterson- Father of DOS
and owned by Seattle Computer Products. It was released in 1982 by Microsoft for its IBM PC. It supports character user
interface which means you have to use commands to get the desired output.
5. List any three signs that indicate that the computer is infected with a virus.
Ans. Following are the three signs that indicate that the computer is infected with a virus:
● Computer runs very slow as it loses its processing speed.
● There will be a change in the system file size
● An unusual increase in number of files
6. Why should regular disk defragmentation be done? [CBSE Handbook]
Ans. Use disk cleanup and disk defragmentation utility programs on a regular basis to remove all unnecessary files and
information that slows down the computer so that the efficiency of the computer increases.
7. Can computer viruses infect hardware? [CBSE Handbook]
Ans. Computer virus is a malicious code that cannot damage the physical components of the computer directly.
8. What is the use of antivirus software? Name any two commonly used anti-virus software. [CBSE Handbook]
Ans. Antivirus software is a program designed to prevent,detect and remove malicious programs from the computer. After you
install the antivirus software runs automatically in the background to provide real-time protection against virus attacks.
Example: McAfee Virus Scan, Norton AntiVirus
9. How are temporary files created on the computer?
Ans. Temporary files are created temporarily by programs that store information related to the file you are working on in your
computer. It increases the efficiency of the software and also helps in recovering the data at the time of unexpected
closing of the file due to power failure or system shut down.
B. Long answer type questions:
1. List a few important functions performed by an operating system.
Ans. Following are some important functions performed by an operating system:
● It works as an interface between the user and the machine.
● It works as a device manager. It keeps a track that all the devices are functioning properly and are available to the user
whenever needed.
● It manages the software of the computer.
● It manages the computer memory and keeps track of the memory in use and free so that it is available to the user
whenever needed.
2. Where is the taskbar located? What are its important components?
Ans. It is the thin strip present at the bottom of the screen. By default it is always visible at the bottom but we can choose the
auto hide option in the taskbar settings which will disappears the task bar. But it will reappear only when the mouse cursor
moves down to that area. It contains the following important components: Start Menu, Quick Launch Program Icons,
Notification Area, System Clock.
3. What is a file in computers? Give examples.
Ans. Any data in the computer is stored in the form of a file. That is why a file is said to be a collection of logically related data.
Every file has its own unique name which is made up of two parts separated by a period File name (A filename can consist
of letters, numbers, spaces, and characters) and extension that identifies the file type.
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