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Welcome to the The Computer MCQs Page

Dive deep into the fascinating world of The Computer with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of The Computer, a crucial aspect of Human Computer Interaction. In this section, you will encounter a diverse range of MCQs that cover various aspects of The Computer, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Human Computer Interaction.

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Check out the MCQs below to embark on an enriching journey through The Computer. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Human Computer Interaction.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of The Computer. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

The Computer MCQs | Page 8 of 26

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Q71.
What devices often require discrete control?

a.

Mobile phones and television remote controls

b.

Joysticks and trackballs

c.

Light pens and touch screens

d.

Digitizing tablets and styluses

Discuss
Answer: (a).Mobile phones and television remote controls Explanation:Devices like mobile phones and television remote controls often require discrete control. This might involve dedicated buttons or a central joystick-like device for navigating menus, controlling volume, or selecting from a set of icons.
Q72.
What is a bitmap display?

a.

A display that emits light to form images

b.

A display that uses vast numbers of colored dots or pixels in a rectangular grid to form images

c.

A display that uses laser technology to form images

d.

A display that uses holographic technology to form images

Discuss
Answer: (b).A display that uses vast numbers of colored dots or pixels in a rectangular grid to form images Explanation:A bitmap display refers to a type of display that creates images using numerous colored dots or pixels arranged in a rectangular grid. Each pixel's color or intensity is stored in the computer's video card, and these pixels can create images in black and white, grayscale, or full color.
Q73.
What determines the color or intensity at each pixel in a bitmap display?

a.

The computer’s processor

b.

The computer’s video card

c.

The computer's memory

d.

The computer's operating system

Discuss
Answer: (b).The computer’s video card Explanation:The color or intensity at each pixel in a bitmap display is held by the computer's video card. The more bits per pixel stored by the video card, the more color or intensity possibilities a display can show.
Q74.
What is the purpose of anti-aliasing in bitmap displays?

a.

To increase the number of colors that can be displayed

b.

To increase the brightness of the display

c.

To soften the edges of line segments and make the rough edges caused by pixel approximation less obvious

d.

To decrease the resolution of the display

Discuss
Answer: (c).To soften the edges of line segments and make the rough edges caused by pixel approximation less obvious Explanation:Anti-aliasing is a technique used in bitmap displays to reduce the problem of 'jaggies', or rough edges, caused by the attempt to approximate lines and curves with pixels. Anti-aliasing works by softening the edges of line segments, effectively blurring the discontinuity and making the jaggies less noticeable.
Q75.
What are two factors that are important to consider in the resolution of a bitmap screen?

a.

The total number of pixels and the density of pixels

b.

The size of the screen and the refresh rate of the screen

c.

The color depth and the refresh rate of the screen

d.

The size of the screen and the color depth

Discuss
Answer: (a).The total number of pixels and the density of pixels Explanation:The resolution of a bitmap screen is primarily determined by two factors: the total number of pixels and the density of pixels. The total number of pixels usually has a standard ratio, while the density of pixels is measured in pixels per inch. These factors together influence the quality of the display image.
Q76.
What happens when a computer gives a screen less resolution than its maximum?

a.

The image becomes brighter

b.

The image becomes more colorful

c.

The image may be stretched or reduced, sometimes leading to display 'artifacts'

d.

The image becomes 3D

Discuss
Answer: (c).The image may be stretched or reduced, sometimes leading to display 'artifacts' Explanation:If a computer gives a screen less resolution than its maximum, the display adjusts according to its type. In a cathode ray tube (CRT) screen, the image is typically stretched over the screen surface, reducing the pixel density. An LCD screen maintains its pixel size and doesn't use all its screen space, creating a black border instead. This resizing can lead to display 'artifacts' like disappearing lines or irregular line thickness.
Q77.
How does a cathode ray tube (CRT) display work?

a.

It uses liquid crystals to form images.

b.

It emits a stream of electrons that is directed by magnetic fields to hit a phosphor-coated screen, causing the phosphor to glow.

c.

It uses light-emitting diodes to form images.

d.

It utilizes plasma technology to create images.

Discuss
Answer: (b).It emits a stream of electrons that is directed by magnetic fields to hit a phosphor-coated screen, causing the phosphor to glow. Explanation:A cathode ray tube (CRT) display works by emitting a stream of electrons from an electron gun. This stream is then directed by magnetic fields to hit a phosphor-coated screen. The phosphor gets excited by the electrons and emits light, or glows. The electron beam is scanned across the screen, creating an image.
Q78.
How are grayscale images displayed on a black and white CRT screen?

a.

By using three electron guns.

b.

By altering the colors of the phosphor dots.

c.

By varying the intensity of the electron beam.

d.

By utilizing beam penetration technique.

Discuss
Answer: (c).By varying the intensity of the electron beam. Explanation:On a black and white CRT screen, grayscale images are displayed by varying the intensity of the electron beam. This alteration in intensity allows the display of different shades of gray, from black to white.
Q79.
Why do color CRT screens have a lower resolution than equivalent monochrome screens?

a.

Because color screens use a high-persistence phosphor.

b.

Because color screens use interlacing technique.

c.

Because the process of combining red, green, and blue phosphor dots to create colors using a shadow mask is imprecise.

d.

Because color screens use beam penetration.

Discuss
Answer: (c).Because the process of combining red, green, and blue phosphor dots to create colors using a shadow mask is imprecise. Explanation:The resolution of color CRT screens is lower than that of equivalent monochrome screens because the technique used to produce color is less precise. Color CRT screens use three electron guns to hit red, green, and blue phosphors. These three phosphor dots are focused to make a single point using a shadow mask, which is an imprecise method and reduces the resolution.
Q80.
What does animation refer to in the context of CRT display technology?

a.

Only to the movements of figures or characters on the screen.

b.

To the use of motion in displays, including moving the cursor, opening windows, and indicating processor-intensive calculations.

c.

To the flickering of the screen.

d.

To the changing colors on the screen.

Discuss
Answer: (b).To the use of motion in displays, including moving the cursor, opening windows, and indicating processor-intensive calculations. Explanation:In the context of CRT display technology, animation refers to the use of motion in displays. This could include various actions such as moving the cursor, opening windows, indicating processor-intensive calculations, and more. It doesn't strictly refer to the movements of characters or figures on the screen.
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