Understanding Graphics Primitives and Devices

What is a Cathode Ray Tube (CRT)?

• A Cathode Ray Tube (CRT) is a vacuum tube that displays images by directing electron beams onto a phosphorescent screen.

• A Cathode Ray Tube (CRT) is a solid-state device that emits light.

• A Cathode Ray Tube (CRT) uses liquid crystals to display images.

• A Cathode Ray Tube (CRT) is a type of LED display.

Describe the main function of a raster scan display.

• The main function of a raster scan display is to render images by sequentially illuminating pixels in a grid format.

• To store images in a compressed format for faster access.

• To create 3D models by projecting them onto a flat surface.

• To display images using a single continuous line of pixels.

What are the advantages of plasma displays over LCDs?

• Advantages of plasma displays over LCDs include better color accuracy, deeper blacks, wider viewing angles, faster response times, and larger screen sizes.

• Better performance in bright light

• More affordable than LCDs

• Higher energy consumption

List two types of input devices used in graphics applications.

• Scanner

• Keyboard

• Graphics tablet, Mouse

• Printer

How does a trackball differ from a traditional mouse?

• A trackball is used exclusively for gaming, while a traditional mouse is for general use.

• A trackball allows cursor movement by rotating a ball, while a traditional mouse requires moving the entire device.

• A trackball has more buttons than a traditional mouse.

• A trackball is a wireless device, while a traditional mouse is always wired.

Explain the concept of positioning techniques in graphics.

• Positioning techniques are only used for text alignment.

• Positioning techniques in graphics are methods for arranging visual elements, including absolute, relative, fixed, and sticky positioning.

• Positioning techniques refer to color selection methods.

• Positioning techniques are irrelevant in graphic design.

What are rubber-band techniques used for in graphical interfaces?

• Rubber-band techniques are used for creating animations in graphical interfaces.

• Rubber-band techniques are used for resizing images without maintaining aspect ratio.

• Rubber-band techniques are used for visual feedback during selection or manipulation of objects in graphical interfaces.

• Rubber-band techniques are used for generating random colors in graphical interfaces.

Define the term 'multiple selections' in the context of input techniques.

• Multiple selections are input techniques that allow users to select multiple options from a set.

• Multiple selections are input techniques that require users to input text manually.

• Multiple selections allow users to select only one option at a time.

• Multiple selections refer to the ability to deselect options after making a selection.

What is the purpose of scales and guidelines in graphic design?

• To create random designs without any structure.

• To confuse the viewer with inconsistent elements.

• The purpose of scales and guidelines in graphic design is to ensure consistency, balance, and proportion in visual elements.

• To limit creativity and artistic expression.

How do graphical potentiometers enhance user interaction?

• They only provide static controls without feedback.

• They require complex programming to function.

• Graphical potentiometers enhance user interaction by providing intuitive visual controls and real-time feedback.

• They are used exclusively for audio applications.