Test: Fundamentals Of Computer- 1 - Class 5 MCQ

Explanation:
The correct answer is Trackball. Here is a detailed explanation:
What is a trackball?
A trackball is a pointing device that is similar to a mouse but operates differently. Instead of moving the entire device on a surface, a trackball has a sphere on the top that can be rotated or rolled with the fingers or palm to navigate the cursor on the screen.
Advantages of a trackball:
- Precise control: The rolling motion of the trackball allows for fine-tuned movements, making it suitable for tasks that require precision, such as graphic design or gaming.
- Space-saving: Unlike a conventional mouse, a trackball remains stationary on the desk, requiring less space to operate.
- Ergonomic design: The stationary position of the trackball reduces the strain on the wrist and forearm, making it a more comfortable option for prolonged use.
- Versatility: Trackballs can be used by both right-handed and left-handed individuals, as the sphere can be easily accessed from either side.
Comparison with other options:
- Zip Disk: A Zip Disk is a removable storage medium used in the past but is not related to the navigation of a cursor.
- Optical Mouse: An optical mouse is similar to a traditional mouse but uses a light-emitting diode (LED) and optical sensors to track movement, whereas a trackball uses the rolling motion of a sphere.
- Keyboard: A keyboard is an input device used for typing and entering commands, and it is not used for cursor navigation.
In conclusion, a trackball is a device with a sphere on the top that is used for navigation, making it the correct answer in this case.

To view the document on screen a visual display unit is required, which is monitor and to print the document a printer is required. Speakers are used for listening to music and scanner is used for digitizing a hard copy. So, in the given scenario speakers and scanner would not be required.

To transfer real pictures or documents into a computer-generated file, you will need a specific device designed for this purpose. Among the given options, option A appears to be the correct device. Let's discuss why:
1. Option A: The device shown in the image appears to be a scanner. Scanners are commonly used to convert physical documents or pictures into digital files. They use a combination of sensors and light to capture the image and transfer it to a computer.
2. Option B: The device shown in the image seems to be a printer. While printers can produce physical copies of digital files, they do not have the capability to convert physical documents or pictures into computer-generated files.
3. Option C: The device shown in the image appears to be a projector. Projectors are used to display digital images or videos onto a screen or surface, but they do not have the functionality to convert physical documents or pictures into computer-generated files.
4. Option D: The device shown in the image seems to be a fax machine. Fax machines are used to send and receive physical copies of documents over telephone lines, but they do not have the capability to convert physical documents or pictures into computer-generated files.
Therefore, based on the provided images, option A - the scanner - is the most suitable device for transferring real pictures or documents into a computer-generated file.

Explanation:
The correct answer is B: Trackpad.
A trackpad is a pointing device that is commonly found on laptops and some desktop computers. It allows users to control the movement of the cursor on the screen by touching the surface of the trackpad with their fingers. Here is a detailed explanation:
- Trackpad: A trackpad, also known as a touchpad, is a flat surface that is sensitive to touch. It is typically located below the keyboard on a laptop and can be used to control the movement of the cursor on the screen.
- Cursor movement: When you touch the trackpad with your finger and move it across the surface, the cursor on the screen also moves accordingly. The trackpad senses the movement of your finger and translates it into cursor movement.
- Touch gestures: In addition to basic cursor movement, trackpads often support various touch gestures. These gestures can be used to perform actions such as scrolling, zooming, and right-clicking without the need for physical buttons.
- Advantages: Trackpads are popular because they are compact, convenient, and provide a more natural way of interacting with the computer compared to traditional mice. They also eliminate the need for a separate mouse and can be used comfortably on the go.
- Alternative pointing devices: While a trackpad is the most common pointing device on laptops, other options include a trackball, which is a stationary ball that is rolled with the fingers, and an optical mouse, which uses a laser or LED to track movement on a surface.
- Conclusion: In conclusion, a trackpad is a pointing device that allows users to control the cursor on the screen by touching the surface with their fingers. It is commonly found on laptops and provides a convenient and intuitive way of interacting with the computer.

A speech synthesizer pre-processes the textual file to differentiate between numbers, dates and abbreviations and then turn them into words. Then for each word a list of phonemes is created and then finally the sound is produced.

Using a touchscreen, you can provide input by selecting item on screen using your fingers and you can also view the output on screen. So, it is both an input and output device.

Common Name for a Video Camera that Streams Video over the Internet:
There are several common names for a video camera that streams video over the internet. Among them, the most commonly used term is "webcam."
Explanation:
- Webcam: A webcam is a type of video camera that is primarily used for video calling, video conferencing, and live streaming over the internet. It is a common term used by both professionals and individuals alike. Webcams are often built into laptops, computers, or external devices that can be connected to a computer via USB. They are widely used for various purposes such as online meetings, vlogging, video chats, and surveillance.
- iCam: While "iCam" may sound like a plausible name, it is not commonly used to refer to a video camera that streams video over the internet. The term "iCam" is often associated with Apple's line of products, such as the iPhone or iPad, which have built-in cameras capable of video streaming.
- Netcam: "Netcam" is another term that can be used to refer to a video camera that streams video over the internet. However, it is not as commonly used as "webcam." "Netcam" is a more specific term that emphasizes the camera's connection to the internet ("net") but may not be as well-known or frequently used by the general public.
- Intercam: "Intercam" is not a commonly used term for a video camera that streams video over the internet. It is not widely recognized or widely used in the industry. It is possible that "Intercam" is a term specific to a certain brand or model of video camera, but it is not a term that is generally used or recognized by the wider audience.
In conclusion, the most common name for a video camera that streams video over the internet is "webcam." While other terms such as "iCam" or "Netcam" may be used in certain contexts, they are not as widely recognized or commonly used as "webcam."

Except option [C], rest all are flat panel is play devices. 

Answer:
The correct option is D:
Explanation:
The device that satisfies all the given conditions is option D. Let's break down each point and explain why option D is the correct answer:
1. It is an input device: An input device is a device that allows the user to input data or commands into the computer. Option D, which is a mouse, is an input device.
2. It is connected to the VDU: VDU stands for Visual Display Unit, which refers to the computer monitor or screen. The mouse in option D is connected to the computer through a cable or wirelessly and is used to control the cursor on the VDU.
3. It contains a light-sensitive element: A mouse typically contains a light-sensitive element, such as an optical sensor or a laser sensor, that detects the movement of the mouse on a surface. This information is then used to move the cursor on the screen. Option D, being a mouse, contains a light-sensitive element.
4. It allows the user to draw or point to objects on the computer screen or the monitor: A mouse is commonly used to draw, select, and point to objects on a computer screen. It provides a way for the user to interact with graphical user interfaces and perform tasks such as drawing, clicking, dragging, and scrolling. Option D, being a mouse, allows the user to draw or point to objects on the computer screen or monitor.
Therefore, based on the given conditions, option D, which is a mouse, is the correct answer.

A barcode contains lines of different thickness, it contains the product code or price information. A barcode reader is a type of scanner that captures and reads information contained in a bar code.