CBSE-SOLUTIONS
CLASS-10
PART-A
UNIT-III ICT SKILLS-II
1. A ________ operating system is a computing environment that reacts to input within a specific period of time.
(a) Single User (b) Multi-User (c) Real Time (d) Distribute
Answer: (c) Real Time
2. Identify the measure to protect computer from threats and viruses.
(a) Sharing password with friends (b) Allow anyone to use your device
(c) Use Antivirus (d) Leave computer without logging out
Answer: (c) Use Antivirus
3. The cleaning of software installed in the computer cannot be achieved by ________.
(a) Disk cleanup (b) Backup (c) Cleaning CPU cabinet (d) Installing antivirus software
Answer: (a) Disk cleanup
4. Which one of the following shortcut keys is used to paste a file?
(a) Ctrl + C (b) Ctrl + P (c) Ctrl + V (d) Ctrl + X
Answer: (c) Ctrl + V
5. How can an antivirus protect your device?
(a) It can protect it from over-heating. (b) It can increase its performance.
(c) It can prevent data from getting corrupt. (d) It can backup data.
Answer: (c) It can prevent data from getting corrupt.
6. Which option is not required to keep a device cool?
(a) Keep the device unplugged when in use. (b) Do not cover the laptop with a blanket.
(c) Make sure the computer’s CPU fan is working. (d) Avoid leaving the device in the sun.
Answer: (a) Keep the device unplugged when in use.
7. Which of the following is essential for maintaining keyboard?
(a) Turn the keyboard upside down and shake it to remove.
(b) Blow dust and other particles with the help of a blower.
(c) Use a very diluted combination of soap and water applied with a non-abrasive cloth to remove stains from the keycaps.
(d) All of the above
Answer: (d) All of the above
B. Fill in the Blanks
1. Small images on the desktop are called ________.
Answer: Icons
2. Two special icons on the Desktop are called ________ and ________.
Answer: My Computer (This PC) and Recycle Bin
3. The icon that provides access to all drives, files and folders on the computer is called ________.
Answer: My Computer (or This PC)
4. The button on the left of the taskbar is called ________.
Answer: Start Button
5. The picture for the desktop background is called ________.
Answer: Wallpaper
6. Similar types of files can be placed into a group called ________.
Answer: Folder
7. To change the name of any file or folder, point the mouse and right click it for short cut menu. Then select ________ option.
Answer: Rename
8. Location where the deleted files are kept is called ________.
Answer: Recycle Bin
9. Name of the antivirus installed on your computer is ________.
Answer: (Write the name of antivirus installed in your school computer)
10. Names of two commonly used antivirus software are ________ and ________.
Answer: Quick Heal and Avast (or any two: Norton, Kaspersky, McAfee, etc.)
11. A virus ________ infect computer hardware.
Answer: cannot
12. A temporary file has a file extension of ________.
Answer: .tmp
13. All files can be selected from a current folder by typing ________ from the keyboard.
Answer: Ctrl + A
14. A window for Run dialogue can be obtained by pressing the keys ________.
Answer: Windows + R
15. Typing ________ in the run dialogue box will open the "Temp Folder".
Answer: temp
16. A ________ is a software program that attaches itself to other programs and alters their behaviour.
Answer: Virus
C. Answer the following Questions:
1. What is an Operating System?
Answer:
An Operating System is a software that acts as an interface between the user and the computer hardware. It manages all the resources of the computer and helps the user to operate the computer easily. Examples: Windows, Linux, macOS.
2. Mention any three functions of the Operating System.
Answer:
It manages the memory of the computer.
It controls and coordinates all hardware devices.
It provides a user interface (like desktop) to interact with the computer.
3. Name any three Operating Systems for the computer.
Answer:
- Microsoft Windows
- Linux
- macOS
4. Name any three mobile phone Operating Systems.
Answer:
- Android
- iOS
- HarmonyOS
5. What is the name given to the screen which appears just after the Windows Operating System is loaded?
Answer: Desktop
6. Name two special icons on the Desktop.
Answer:
- My Computer (This PC)
- Recycle Bin
7. Describe the steps to create a new folder.
Answer:
Right-click on the empty space on the desktop or inside any window.
Select New → Folder.
Type the name of the folder and press Enter.
8. Describe the steps to delete a folder.
Answer:
Select the folder.
Press the Delete key on the keyboard.
Or
Right-click on the folder and select Delete.
9. Describe the difference between moving and copying a file.
Answer:
Moving a file: The file is removed from its original location and placed in a new location.
Copying a file: A duplicate of the file is created in the new location while the original file remains in its place.
10. What is the difference between a file and a folder?
Answer:
A file is a collection of data (like a document, photo, video).
A folder is a container used to organize and store multiple files and other folders.
11. How can one empty the recycle bin? Describe the steps for the same.
Answer:
Double-click on the Recycle Bin icon on the desktop.
Click on Empty Recycle Bin option on the toolbar.
Click Yes to confirm.
12. Describe the steps using any one method to move the folder from one location to another.
Answer: (Drag and Drop method)
- Open the folder’s current location.
- Select the folder.
- Drag it to the new location while holding the left mouse button.
- Release the mouse button.
13. Discuss why we need to maintain the computer?
Answer:
Computer maintenance is necessary to keep it running smoothly, increase its speed, prevent data loss, avoid hardware damage, and increase its lifespan.
14. Elaborate some of the things that we need to do to care for and maintain the computer regularly.
Answer:
- Keep the computer dust-free.
- Install and update antivirus software.
- Remove temporary and unwanted files regularly.
- Avoid eating or drinking near the computer.
- Shut down the computer properly.
15. Describe procedures for cleaning any three peripherals of a computer.
Answer:
Keyboard: Turn it upside down and shake gently. Use a blower or soft cloth to clean dust.
Mouse: Clean the bottom sensor with a dry cloth. Remove and clean the scroll wheel if needed.
Monitor: Wipe the screen gently with a soft microfiber cloth.
16. Describe the procedure to clean any two computer components.
Answer:
CPU Cabinet: Open the side panel and clean dust from fans and components using a blower.
RAM: Remove the RAM carefully and clean the golden contacts with a soft eraser or cloth.
17. Describe the possible causes for slowing down of the computer.
Answer:
- Too many temporary files.
- Low disk space.
- Too many programs running at the same time.
- Virus or malware infection.
- Fragmented hard disk.
18. Why is it required that keyboard be covered while cleaning the computer and its components?
Answer:
The keyboard should be covered so that dust particles do not fall inside the keyboard keys while cleaning other parts like the CPU or monitor.
19. What are the general precautions one should take while performing on a computer.
Answer:
- Do not eat or drink near the computer.
- Do not insert any metal object inside the computer.
- Always use antivirus.
- Shut down properly.
- Avoid direct sunlight and moisture.
20. List down any four maintenance activities that should be performed on a computer.
Answer:
- Disk Cleanup
- Disk Defragmentation
- Updating antivirus and Windows.
- Removing temporary files.
21. Why and when is the disk defragmentation required to be done?
Answer:
Disk defragmentation is required to arrange scattered files properly on the hard disk so that the computer can access them faster. It should be done when the computer becomes slow due to fragmented files.
22. What are antiviruses? Name any two antiviruses.
Answer:
Antivirus is a software program designed to detect, prevent, and remove viruses and other malware from the computer.
Two antiviruses: Quick Heal and Avast.
23. Give three common signs which show that the virus has infected the computer.
Answer:
- Computer becomes unusually slow.
- Frequent unwanted pop-ups and advertisements appear.
- Files/folders are automatically deleted or modified.
24. What are the various ways by which the computer could get infected with virus?
Answer:
- Opening infected email attachments.
- Downloading software from untrusted websites.
- Using infected USB pendrives.
- Visiting malicious websites.
25. How are temporary files created in a computer?
Answer:
Temporary files are automatically created by the operating system and running programs to store temporary data for faster processing.
26. Why should we remove temporary files from a computer?
Answer:
To free up disk space, improve system speed and performance.
27. What are cookies? How do they help?
Answer:
Cookies are small text files stored by websites on our computer. They help remember login details, preferences and make browsing faster.
28. Can cookies infect your computer? Describe how.
Answer:
No, cookies cannot infect a computer. They are harmless text files and cannot run or spread like viruses.
29. What is a firewall in computing terminology?
Answer:
A firewall is a security system that monitors and controls incoming and outgoing network traffic to protect the computer from unauthorized access and threats.
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