Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
Which statement best describes the basic working principle of a conventional LCD monitor?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• LCD stands for Liquid Crystal Display.
• Liquid-crystal cells control or modulate light to produce the required image.
• Conventional LCD panels normally rely on a separate backlight because the liquid crystals themselves do not provide the main illumination.
• Liquid-crystal cells control or modulate light to produce the required image.
• Conventional LCD panels normally rely on a separate backlight because the liquid crystals themselves do not provide the main illumination.
వివరణ:
Question 2
ప్రశ్న 2
Which statement about an LED-backlit LCD monitor is correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Many monitors marketed as LED monitors are actually LCD panels using LEDs as their backlight source.
• The liquid-crystal layer still controls the light passing through individual pixel areas.
• LED describes the backlighting technology rather than replacing the LCD image-forming layer.
• The liquid-crystal layer still controls the light passing through individual pixel areas.
• LED describes the backlighting technology rather than replacing the LCD image-forming layer.
వివరణ:
Question 3
ప్రశ్న 3
What is the principal advantage of a TFT active-matrix LCD compared with older passive-matrix LCD technology?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• TFT stands for Thin-Film Transistor.
• In an active-matrix LCD, transistor-based control is provided for individual pixel elements, allowing more accurate and faster control.
• TFT LCDs therefore became widely used in computer monitors and portable displays.
• In an active-matrix LCD, transistor-based control is provided for individual pixel elements, allowing more accurate and faster control.
• TFT LCDs therefore became widely used in computer monitors and portable displays.
వివరణ:
Question 4
ప్రశ్న 4
In an LCD monitor, a pixel is best described as:
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A pixel is the basic picture element in a digital display.
• Thousands or millions of pixels together form the complete screen image.
• Display resolution specifies the number of pixel positions horizontally and vertically.
• Thousands or millions of pixels together form the complete screen image.
• Display resolution specifies the number of pixel positions horizontally and vertically.
వివరణ:
Question 5
ప్రశ్న 5
Why does an LCD monitor generally produce its clearest image when operated at its native resolution?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• An LCD panel has a fixed physical arrangement of pixels known as its native resolution.
• At native resolution, displayed image pixels can map most directly to physical screen pixels.
• Other resolutions may require scaling or interpolation, which can reduce apparent sharpness.
• At native resolution, displayed image pixels can map most directly to physical screen pixels.
• Other resolutions may require scaling or interpolation, which can reduce apparent sharpness.
వివరణ:
Question 6
ప్రశ్న 6
A Full HD monitor has a resolution of 1920 × 1080. How many pixel positions does the complete display contain?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Total pixel count is calculated by multiplying horizontal pixels by vertical pixels.
• 1920 × 1080 = 2,073,600.
• Therefore a 1920 × 1080 display contains 2,073,600 pixel positions.
• 1920 × 1080 = 2,073,600.
• Therefore a 1920 × 1080 display contains 2,073,600 pixel positions.
వివరణ:
Question 7
ప్రశ్న 7
A monitor is operating at 75 Hz. What does the value 75 Hz indicate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Refresh rate is measured in hertz, meaning cycles per second.
• A 75 Hz refresh rate corresponds to 75 display refresh cycles per second.
• It is different from resolution, response time and graphics-memory capacity.
• A 75 Hz refresh rate corresponds to 75 display refresh cycles per second.
• It is different from resolution, response time and graphics-memory capacity.
వివరణ:
Question 8
ప్రశ్న 8
Which monitor specification describes how quickly a pixel can change from one state or colour level to another?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Response time measures how quickly display pixels can change state.
• It is commonly expressed in milliseconds.
• Faster pixel transitions can help reduce visible trailing or ghosting in rapidly changing images.
• It is commonly expressed in milliseconds.
• Faster pixel transitions can help reduce visible trailing or ghosting in rapidly changing images.
వివరణ:
Question 9
ప్రశ్న 9
A monitor produces visible trails behind rapidly moving objects even though the computer is otherwise functioning normally. Which monitor characteristic is most directly associated with this effect?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Slow pixel transitions can make remnants of previous image states remain visible briefly.
• This effect is commonly described as ghosting or motion trailing.
• Pixel response time is therefore an important characteristic for fast-moving display content.
• This effect is commonly described as ghosting or motion trailing.
• Pixel response time is therefore an important characteristic for fast-moving display content.
వివరణ:
Question 10
ప్రశ్న 10
Which monitor specification primarily describes the difference between the brightest white and darkest black the display can reproduce?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Contrast ratio expresses the relationship between a display's bright and dark output levels.
• Higher effective contrast can help provide greater distinction between bright and dark image areas.
• It is different from resolution, refresh rate and storage capacity.
• Higher effective contrast can help provide greater distinction between bright and dark image areas.
• It is different from resolution, refresh rate and storage capacity.
వివరణ:
Question 11
ప్రశ్న 11
The brightness of a computer monitor is commonly specified using which unit?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Display luminance is commonly expressed in candela per square metre, written as cd/m².
• The term nit is commonly used for the same luminance unit in display specifications.
• RPM, bytes and bits per second describe unrelated computer characteristics.
• The term nit is commonly used for the same luminance unit in display specifications.
• RPM, bytes and bits per second describe unrelated computer characteristics.
వివరణ:
Question 12
ప్రశ్న 12
Which monitor characteristic describes how far a viewer can move away from the direct front position while still seeing an acceptable image?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Viewing angle indicates the range of positions from which a display remains reasonably visible with acceptable image quality.
• Colour and contrast may change when a display is viewed far from its intended angle.
• It is a display-panel characteristic rather than a storage or boot characteristic.
• Colour and contrast may change when a display is viewed far from its intended angle.
• It is a display-panel characteristic rather than a storage or boot characteristic.
వివరణ:
Question 13
ప్రశ్న 13
One pixel on an LCD screen remains black under all normal images while surrounding pixels function correctly. This condition is most commonly described as a:
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A dead pixel is a pixel that no longer responds normally and commonly appears permanently dark.
• A stuck pixel, by comparison, may remain fixed on a particular colour or subpixel state.
• An isolated pixel defect does not normally indicate failure of the entire monitor.
• A stuck pixel, by comparison, may remain fixed on a particular colour or subpixel state.
• An isolated pixel defect does not normally indicate failure of the entire monitor.
వివరణ:
Question 14
ప్రశ్న 14
A monitor displays 'No Signal' immediately after its video cable was disconnected and reconnected. What should be checked first?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A 'No Signal' message means the monitor itself has power but is not detecting the expected video input.
• The cable should be securely connected at both ends and the correct HDMI, DisplayPort, VGA or other input should be selected.
• Reinstalling the operating system is not an appropriate first step for an immediately obvious connection-related symptom.
• The cable should be securely connected at both ends and the correct HDMI, DisplayPort, VGA or other input should be selected.
• Reinstalling the operating system is not an appropriate first step for an immediately obvious connection-related symptom.
వివరణ:
Question 15
ప్రశ్న 15
An LCD monitor is powered on and a very faint desktop image can be seen only when a bright light is directed at the screen. Which component is most likely to be malfunctioning?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• If image information is faintly visible, the LCD panel may still be producing the image pattern.
• The absence of normal illumination strongly suggests a backlight or related power/control problem.
• Keyboard, storage and network hardware do not provide panel illumination.
• The absence of normal illumination strongly suggests a backlight or related power/control problem.
• Keyboard, storage and network hardware do not provide panel illumination.
వివరణ:
Question 16
ప్రశ్న 16
A monitor suddenly shows a strong incorrect colour tint after its display cable was moved. Which should be checked before replacing the monitor?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A loose or damaged display connection can interfere with proper transmission of colour information.
• Because the symptom appeared after the cable was moved, the cable and connectors are logical first checks.
• Storage, printer and keyboard settings are unrelated to this specific display symptom.
• Because the symptom appeared after the cable was moved, the cable and connectors are logical first checks.
• Storage, printer and keyboard settings are unrelated to this specific display symptom.
వివరణ:
Question 17
ప్రశ్న 17
Two LCD monitors have the same physical screen size, but Monitor X has a substantially higher native resolution than Monitor Y. Which statement is generally correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Pixel density describes how closely pixels are packed within a given physical area.
• With the same screen size, a higher native resolution means more physical pixels are present within approximately the same area.
• This generally produces greater pixel density and can support finer image detail.
• With the same screen size, a higher native resolution means more physical pixels are present within approximately the same area.
• This generally produces greater pixel density and can support finer image detail.
వివరణ:
Question 18
ప్రశ్న 18
A monitor's power indicator is on, but the screen remains completely blank and even the monitor's own on-screen settings menu does not appear. Which conclusion is most reasonable as an initial diagnosis?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A monitor's built-in on-screen display is generated by the monitor itself and does not depend on the computer's operating system.
• If even that menu cannot be displayed despite apparent power, an internal monitor-related fault becomes more likely.
• Troubleshooting should still verify power and basic connections before component replacement.
• If even that menu cannot be displayed despite apparent power, an internal monitor-related fault becomes more likely.
• Troubleshooting should still verify power and basic connections before component replacement.
వివరణ:
Question 19
ప్రశ్న 19
The distance between the centres of adjacent pixels on a display is commonly referred to as:
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Pixel pitch describes the physical spacing between neighbouring pixels or corresponding display elements.
• Smaller pixel spacing generally permits pixels to be packed more densely for a given panel size.
• Pixel pitch is a physical display characteristic and is different from refresh rate or colour depth.
• Smaller pixel spacing generally permits pixels to be packed more densely for a given panel size.
• Pixel pitch is a physical display characteristic and is different from refresh rate or colour depth.
వివరణ:
Question 20
ప్రశ్న 20
Consider the following statements about LCD monitors:
1. LCD panels contain a fixed physical pixel matrix.
2. Native resolution corresponds to that physical pixel arrangement.
3. Refresh rate is normally expressed in hertz.
4. A backlight problem can result in an extremely dim image even when image data is still being generated.
Which statements are correct?
1. LCD panels contain a fixed physical pixel matrix.
2. Native resolution corresponds to that physical pixel arrangement.
3. Refresh rate is normally expressed in hertz.
4. A backlight problem can result in an extremely dim image even when image data is still being generated.
Which statements are correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• LCD panels have a fixed matrix of physical pixels that defines their native resolution.
• Refresh rate is measured in hertz and indicates the number of display refresh cycles per second.
• A failed or weak backlight can make a valid LCD image extremely difficult to see, so all four statements are correct.
• Refresh rate is measured in hertz and indicates the number of display refresh cycles per second.
• A failed or weak backlight can make a valid LCD image extremely difficult to see, so all four statements are correct.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: B. Liquid-crystal cells control the passage of light to form the displayed image. సమాధానం: B.
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Question 2 ప్రశ్న 2Answer: D. LEDs provide the backlight while the LCD panel controls the formation of the image. సమాధానం: D.
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Question 3 ప్రశ్న 3Answer: A. Individual pixels are controlled more precisely using transistor-based switching. సమాధానం: A.
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Question 4 ప్రశ్న 4Answer: C. The smallest addressable picture element used to form the displayed image సమాధానం: C.
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Question 5 ప్రశ్న 5Answer: C. The input image can correspond directly to the panel's fixed physical pixel matrix with minimal scaling. సమాధానం: C.
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Question 6 ప్రశ్న 6Answer: A. 2,073,600 సమాధానం: A.
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Question 7 ప్రశ్న 7Answer: D. The displayed image can be refreshed 75 times per second in that operating mode. సమాధానం: D.
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Question 8 ప్రశ్న 8Answer: B. Response time సమాధానం: B.
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Question 9 ప్రశ్న 9Answer: B. Pixel response time సమాధానం: B.
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Question 10 ప్రశ్న 10Answer: C. Contrast ratio సమాధానం: C.
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Question 11 ప్రశ్న 11Answer: A. Candela per square metre (cd/m²), commonly called nits సమాధానం: A.
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Question 12 ప్రశ్న 12Answer: D. Viewing angle సమాధానం: D.
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Question 13 ప్రశ్న 13Answer: D. Dead pixel సమాధానం: D.
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Question 14 ప్రశ్న 14Answer: B. The video-cable connection and the monitor's selected input source సమాధానం: B.
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Question 15 ప్రశ్న 15Answer: C. Display backlight or its associated circuitry సమాధానం: C.
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Question 16 ప్రశ్న 16Answer: A. The display cable and connector for looseness or damaged contacts సమాధానం: A.
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Question 17 ప్రశ్న 17Answer: A. Monitor X has a greater pixel density because more pixels are fitted into a similar screen area. సమాధానం: A.
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Question 18 ప్రశ్న 18Answer: D. A fault within the monitor's display, backlight, power or internal electronics should be considered. సమాధానం: D.
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Question 19 ప్రశ్న 19Answer: B. Pixel pitch సమాధానం: B.
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Question 20 ప్రశ్న 20Answer: C. 1, 3 and 4 only సమాధానం: C.