Chapter 3 ICT Skills NCERT Book Solution
Session 4: Parts of a Computer and Peripherals
Check Your Progress
A. Multiple-choice questions
1. Which of the following units make up the CPU? Choose and tick all the correct options.
(a) Processing Unit
(b) Input Unit
(c) Memory Unit
(d) Control Unit
(e) Output Unit
Answer: (a), (c) and (d)
2. Which of the following are names of ports in a computer? Choose and tick all the correct options.
(a) HDMI
(b) Input
(c) VGA
(d) USB
(e) Ethernet
Answer: (a), (c), (d)
3. There is a talent contest in your town. For participating in the audition, you have to send a recording of a song. What would you connect to your computer to record your song?
(a) Keyboard
(b) Microphone
(c) Scanner
(d) Mouse
Answer: (b) Microphone
B. Short answer questions
1. Write the purpose of the I/O devices.
Answer:
| Input/output device | Purpose |
| Mic/ Microphone | To record voice on the computer and to communicate |
| Scanner | To scan/capture a paper image, document, and converts it to a digital file on the computer |
| Camera | To record videos and photographs |
| Barcode Reader | To record the items purchased in order to create the receipt or bill |
| Printer | To print out the visual output as displayed on the monitor or on the paper |
| Speaker | To play out loud all the sound-based output from the computer |
Session 5: Basic Computer Operations
Check Your Progress
A. Multiple-choice questions
1. Which of the following functions are performed using a mouse. Choose and tick all the correct options.
(a) Turn on the computer
(b) Typing
(c) Right click
(d) Drag and Drop an Icon
Answer: (c) and (d)
2. What is the term used when you press and hold the left mouse key and move the mouse around?
(a) Highlighting
(b) Dragging
(c) Selecting
(d) Moving
Answer: (b) Dragging
3. Rearrange the steps for starting a computer in the correct sequence.
(a) Desktop appears after login ( )
(b) Login screen appears ( )
(c) Power on Self-Test (POST) starts ( )
(d) Operating system starts ( )
(e) Welcome screen appears ( )
Answer: (c) >> (d) >> (b) >> (e) >> (a)
B. Short answer questions
1. Describe the functions of at least 5 types of keys.
Answer: Functions of the five types of keys are –
(a) Function Keys: Keys labeled from F1 to F12 are function keys. You use them to perform specific functions. Their functions differ from program to program.
(b) Control Keys: Keys, such as Control (CTRL), SHIFT, SPACEBAR, ALT, CAPS LOCK, and TAB, are special control keys that perform special functions depending on when and where they are used.
(c) Enter Keys: You use the ENTER or the RETURN key to move the cursor to the beginning of a new line. In some programs, it is used to send commands and to confirm a task on a computer.
(d) Punctuation Keys: It includes keys for punctuation marks, such as colon (:), semicolon (;), question mark (?), single quotation marks (‘ ’), and double quotation marks (“ ”).
(e) Navigation Keys: Keys, such as the arrow keys, HOME, END, PAGE UP, and PAGE DOWN are navigation keys. These are used to move up and down, right and left in a document.
(f) Command Keys: Keys, such as INSERT (INS), DELETE (DEL), and BACKSPACE are command keys.
- When the INSERT key is turned ON, it helps you overwrite characters to the right of the cursor.
- The DELETE key and the BACKSPACE key are used to remove typed text, characters, and other objects on the right and left sides of the cursor, respectively.
2. Describe the functions of a mouse.
Answer: A mouse, as shown in the figure is a small device that you can use to move, select, and open items on your computer screen.
The functions of the Mouse are–
- Point and Click: Mouse allows you to point to any object on the screen and click on that to select it.
- Roll Over/Hover: Mouse can also use to roll over/hover upon any object, sometimes by hovering you can see details of the object.
- Drag and Drop: Drag and Drop is used to move the object/file from one location to another. To move an item, you need to click it, and then hold the mouse button down, to move the item to a new location. After you move the item to the new location, you release the mouse button.
- Double Click: It means quickly clicking the left mouse button twice. When we double-click the file icon, it will open the file.
