Test: Fundamentals Of Computer- 2 - Class 5 MCQ

Answer:
The device that supports the swiping action is C.
Explanation:
The swiping action is a common gesture used in touch-based devices to navigate through content, scroll through pages, or switch between screens.
Here are the details for each device:
A: This device appears to be a television remote control. It typically uses buttons for navigation and does not support swiping action.
B: This device is a computer mouse. While it allows for cursor movement and clicking, it does not support swiping action.
C: This device is a touchscreen smartphone. Touchscreens allow users to interact directly with the display, including swiping gestures.
D: This device is a digital camera. It is primarily used for capturing photos and videos and does not support swiping action.
Therefore, the correct answer is C, the smartphone, which supports the swiping action.

Unit of measurement for digital camera image resolution:
- The unit of measurement used to measure digital camera image resolution is megapixels.
Explanation:
- Megapixels refer to the number of individual pixels in an image captured by a digital camera.
- The term "megapixel" is a combination of "mega," which means one million, and "pixel," which is the smallest unit of a digital image.
- Digital cameras capture images by converting light into a digital signal, and the resolution of the image is determined by the number of pixels present in the image.
- Higher megapixel count generally indicates a higher resolution image with more detail and clarity.
- Megabytes is a unit of measurement used for file size, not image resolution.
- Megahertz is a unit of frequency, not related to image resolution.
- Megatons is a unit of explosive energy, not related to image resolution.
Therefore, the correct answer is D: Megapixels.

Dot pitch is used to measure the sharpness of a monitor's display.
Dot pitch refers to the distance between the centers of two adjacent pixels on a display screen. It is typically measured in millimeters (mm) and is an important factor in determining the clarity and sharpness of the images displayed on a monitor. Here is how dot pitch is used to measure the sharpness of a monitor's display:
- Definition: Dot pitch is the distance between the centers of two pixels of the same color on a display screen.
- Pixel Structure: Each pixel on a monitor is made up of three sub-pixels: one red, one green, and one blue (RGB). These sub-pixels work together to create the full range of colors displayed on the screen.
- Dot Pitch Calculation: Dot pitch is calculated by dividing the diagonal distance between two pixels by the number of pixels in that diagonal. This measurement helps determine the density of pixels on the screen.
- Sharpness: A smaller dot pitch indicates a higher pixel density and results in a sharper and more detailed image. The closer the pixels are to each other, the smoother and more seamless the image appears.
- Importance: Dot pitch is an important specification to consider when choosing a monitor, especially for tasks that require high image quality, such as graphic design, photo editing, and gaming. A lower dot pitch is generally preferred for these applications.
- Limitations: However, dot pitch alone does not determine the overall quality of a monitor. Other factors, such as resolution, color accuracy, and contrast ratio, also play a significant role in the overall display quality.
In conclusion, dot pitch is used to measure the sharpness of a monitor's display by determining the distance between the centers of two adjacent pixels. A smaller dot pitch indicates a higher pixel density and results in a sharper image.

Impact printers are those printers that make a contact with the paper while printing the information from a computer.

Answer:
A cathode ray tube (CRT) is found in option C, which shows an image of a CRT.
Explanation:
A cathode ray tube is a type of vacuum tube that contains an electron gun and a fluorescent screen. It is used to display images in older television sets and computer monitors. The CRT works by using an electron beam that is emitted from the electron gun and directed towards the fluorescent screen. The beam is controlled by electromagnetic fields, which allow it to move across the screen and create images by exciting the phosphor coating on the screen.
In the given options, option C shows a diagram of a CRT, which clearly identifies the components and structure of the tube. The other options (A, B, and D) do not show a cathode ray tube, but rather show different electronic components such as resistors, capacitors, and transistors.
Therefore, the correct answer is option C.

Multimedia Software

Multimedia software is used to create full motion video, animation, sound, and other interactive media elements. It allows users to combine different types of media to create engaging and interactive content. Here are some key details about multimedia software:

• Definition: Multimedia software refers to applications and tools that are specifically designed to handle various types of media, including video, audio, images, and animations.



• Functionality: Multimedia software provides a range of features and tools to create, edit, and manipulate different types of media elements. It allows users to add visual effects, transitions, audio tracks, and interactivity to their projects.



• Types: There are various types of multimedia software available, each catering to specific needs and requirements. Some common types include video editing software, animation software, audio editing software, and presentation software.



• Applications: Multimedia software is used in a wide range of industries and fields, including entertainment, advertising, education, gaming, and web development. It is commonly used to create videos, animations, interactive presentations, e-learning courses, and more.



• Examples: Some popular multimedia software includes Adobe Creative Suite (which includes applications like Adobe Premiere Pro for video editing and Adobe After Effects for animation), Autodesk Maya for 3D modeling and animation, and PowerPoint for creating multimedia presentations.

In conclusion, multimedia software is essential for creating dynamic and engaging media content that combines various elements such as video, animation, sound, and more. It offers a range of tools and features to enhance the visual and interactive aspects of multimedia projects.

Purpose of a UPS (Uninterruptible Power Supply)
An Uninterruptible Power Supply (UPS) serves the purpose of maintaining power to connected devices during power outages or fluctuations. It acts as a backup power source for critical equipment and helps prevent data loss and damage.
Key Points:
- UPS provides uninterrupted power supply to connected devices, ensuring they remain operational even during power disruptions.
- It acts as a power backup system, bridging the gap between power failure and generator or alternative power source activation.
- UPS protects electronic devices from voltage spikes, surges, and sags, which can cause damage or data loss.
- It provides temporary power to allow for proper shutdown of equipment, preventing abrupt shutdowns that can lead to system errors or corruption.
- UPS units often include built-in surge protection and voltage regulation to ensure stable and clean power delivery.
- It is commonly used for protecting computer systems, servers, networking equipment, telecommunications devices, and other critical electronics.
- UPS devices come in various sizes and capacities, allowing users to choose the appropriate model based on their power requirements.
- Some advanced UPS systems offer features like remote monitoring, battery management, and automatic shutdown software.
- UPS can also help regulate power quality, providing a stable and consistent power supply to sensitive equipment.
- In addition to businesses, UPS units are also used in homes to protect important electronics, such as home theaters, routers, and gaming consoles.
Overall, the primary purpose of a UPS is to ensure continuous power supply, protect equipment from power disturbances, and prevent data loss or damage during power outages or fluctuations.

Main board and logic board are alternatives of computer motherboard.

To surf the Internet, a web browser is needed and from the given options, only option [A], i.e., Mozilla Firefox is a web browser.

Except option [A], rest all are utility software.