Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
Which statement best describes the function of a digital camera as a computer peripheral?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A digital camera captures photographs or video and represents the captured scene as digital data.
• The resulting files can be stored on internal or removable memory and transferred to a computer.
• It therefore functions as an image-input or image-capture device rather than an output or power device.
• The resulting files can be stored on internal or removable memory and transferred to a computer.
• It therefore functions as an image-input or image-capture device rather than an output or power device.
వివరణ:
Question 2
ప్రశ్న 2
Which component in a digital camera converts incoming light into electrical signals that can be processed to form a digital image?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A digital camera uses an electronic image sensor to detect incoming light.
• CMOS and CCD are well-known image-sensor technologies.
• The sensor's electrical output is processed to create the digital image.
• CMOS and CCD are well-known image-sensor technologies.
• The sensor's electrical output is processed to create the digital image.
వివరణ:
Question 3
ప్రశ్న 3
Which pair represents two established image-sensor technologies used in digital cameras?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• CCD stands for Charge-Coupled Device and CMOS for Complementary Metal-Oxide-Semiconductor.
• Both technologies have been used to implement electronic image sensors in digital cameras.
• The other pairs refer to memory, display or storage technologies rather than camera image sensors.
• Both technologies have been used to implement electronic image sensors in digital cameras.
• The other pairs refer to memory, display or storage technologies rather than camera image sensors.
వివరణ:
Question 4
ప్రశ్న 4
A digital camera is described as having a 24-megapixel image sensor. Approximately what does this specification indicate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• One megapixel represents approximately one million pixels.
• A 24-megapixel camera therefore captures images with roughly 24 million sensor picture elements, depending on the exact specification.
• Megapixel rating describes image resolution rather than zoom ratio or transfer speed.
• A 24-megapixel camera therefore captures images with roughly 24 million sensor picture elements, depending on the exact specification.
• Megapixel rating describes image resolution rather than zoom ratio or transfer speed.
వివరణ:
Question 5
ప్రశ్న 5
Which statement correctly distinguishes optical zoom from digital zoom in a digital camera?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Optical zoom changes the effective framing through the camera's optical lens system.
• Digital zoom enlarges a portion of the captured image electronically and may reduce effective detail.
• For this reason, optical zoom and digital zoom are not equivalent methods of magnification.
• Digital zoom enlarges a portion of the captured image electronically and may reduce effective detail.
• For this reason, optical zoom and digital zoom are not equivalent methods of magnification.
వివరణ:
Question 6
ప్రశ్న 6
A photographer wants to transfer image files from a digital camera to a computer. Which of the following is an appropriate method when supported by the devices?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Digital-camera files can commonly be transferred through USB or by removing the memory card and using a compatible card reader.
• These methods provide data communication with the computer.
• CPU power sockets, DIMM slots and ATX connectors are not camera-data interfaces.
• These methods provide data communication with the computer.
• CPU power sockets, DIMM slots and ATX connectors are not camera-data interfaces.
వివరణ:
Question 7
ప్రశ్న 7
Which device is specifically designed to convert photographs, printed documents or other physical images into digital image data?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A scanner captures information from a physical document or image and converts it into digital form.
• The resulting digital image can be stored, edited, transmitted or processed by software.
• Monitors, speakers and plotters are primarily output devices.
• The resulting digital image can be stored, edited, transmitted or processed by software.
• Monitors, speakers and plotters are primarily output devices.
వివరణ:
Question 8
ప్రశ్న 8
Which type of scanner normally places the document face-down on a stationary glass surface while a scanning mechanism moves beneath it?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A flatbed scanner uses a flat glass platen on which the document is placed.
• The scanning head or optical mechanism moves beneath the glass to capture the document.
• This design is useful for photographs, books and documents that may not be suitable for feeding through rollers.
• The scanning head or optical mechanism moves beneath the glass to capture the document.
• This design is useful for photographs, books and documents that may not be suitable for feeding through rollers.
వివరణ:
Question 9
ప్రశ్న 9
A business needs to digitize hundreds of loose single-page documents efficiently. Which scanner type is generally most suitable?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A sheet-fed scanner with an automatic document feeder can process multiple loose pages sequentially.
• This makes it appropriate for high-volume document digitization.
• Flatbed scanners may be preferable for bound or fragile material, but are generally less convenient for large stacks of loose pages.
• This makes it appropriate for high-volume document digitization.
• Flatbed scanners may be preferable for bound or fragile material, but are generally less convenient for large stacks of loose pages.
వివరణ:
Question 10
ప్రశ్న 10
A museum needs to scan pages from a bound book without forcing them through a roller mechanism. Which device is generally the better choice?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A flatbed scanner permits a book or other bound material to rest on its scanning surface.
• The document does not have to pass through rollers as it would in a conventional sheet-fed scanner.
• This makes a flatbed scanner suitable for many books, photographs and irregular originals.
• The document does not have to pass through rollers as it would in a conventional sheet-fed scanner.
• This makes a flatbed scanner suitable for many books, photographs and irregular originals.
వివరణ:
Question 11
ప్రశ్న 11
In scanner specifications, DPI primarily refers to:
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DPI stands for dots per inch and is commonly used to express scanner resolution.
• A higher optical scanning resolution can capture finer spatial detail from the original, subject to the scanner's actual capabilities.
• DPI does not measure document speed, electrical power or port count.
• A higher optical scanning resolution can capture finer spatial detail from the original, subject to the scanner's actual capabilities.
• DPI does not measure document speed, electrical power or port count.
వివరణ:
Question 12
ప్రశ్న 12
A document is scanned at 600 DPI instead of 300 DPI using the same physical scan area and other settings. Which statement is generally correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Increasing scanning resolution increases the number of samples taken across a given physical distance.
• A 600 DPI setting therefore samples more densely than 300 DPI and can capture finer detail when supported by the scanner and original.
• Higher resolution also commonly produces larger image files.
• A 600 DPI setting therefore samples more densely than 300 DPI and can capture finer detail when supported by the scanner and original.
• Higher resolution also commonly produces larger image files.
వివరణ:
Question 13
ప్రశ్న 13
Which statement best distinguishes a scanner's optical resolution from an interpolated resolution?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Optical resolution is based on the scanner's genuine optical and sensor capture capability.
• Interpolated resolution mathematically estimates additional pixels between captured samples.
• Interpolation can change image dimensions but cannot create the same new physical detail as genuine higher-resolution capture.
• Interpolated resolution mathematically estimates additional pixels between captured samples.
• Interpolation can change image dimensions but cannot create the same new physical detail as genuine higher-resolution capture.
వివరణ:
Question 14
ప్రశ్న 14
A scanner produces an image of a printed page, but the user wants the words in that page to become searchable and editable text. Which technology is required in addition to scanning?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A normal scan produces an image representation of the document.
• Optical Character Recognition, or OCR, analyzes character shapes and converts recognized printed text into machine-readable text.
• OCR therefore enables searching and editing of recognized text rather than merely displaying the page as an image.
• Optical Character Recognition, or OCR, analyzes character shapes and converts recognized printed text into machine-readable text.
• OCR therefore enables searching and editing of recognized text rather than merely displaying the page as an image.
వివరణ:
Question 15
ప్రశ్న 15
Which scanner is specialized for digitizing photographic film negatives or transparencies at high detail?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A film scanner is specifically designed to digitize photographic negatives or transparencies.
• Such devices are optimized for small film frames and high-detail photographic capture.
• Sheet-fed scanners are primarily intended for paper documents.
• Such devices are optimized for small film frames and high-detail photographic capture.
• Sheet-fed scanners are primarily intended for paper documents.
వివరణ:
Question 16
ప్రశ్న 16
A scanned colour photograph has a greater colour bit depth than another scan of the same dimensions. What does greater bit depth primarily allow?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Bit depth determines how many possible values can be represented for the colour or tonal information of image pixels.
• Greater bit depth allows a larger range of representable colour or intensity values.
• It is different from spatial resolution, storage rotation speed and display refresh rate.
• Greater bit depth allows a larger range of representable colour or intensity values.
• It is different from spatial resolution, storage rotation speed and display refresh rate.
వివరణ:
Question 17
ప్రశ్న 17
Which device is most appropriate for directly capturing an image of a three-dimensional scene rather than digitizing an existing flat printed photograph?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A digital camera captures light from real-world scenes and is suitable for photographing three-dimensional subjects.
• A flatbed or sheet-fed scanner is designed mainly for existing flat originals such as documents and photographs.
• OCR is software for recognizing characters rather than a scene-capture device.
• A flatbed or sheet-fed scanner is designed mainly for existing flat originals such as documents and photographs.
• OCR is software for recognizing characters rather than a scene-capture device.
వివరణ:
Question 18
ప్రశ్న 18
A flatbed scanner is detected by the computer, but every scan contains a long unwanted line in exactly the same position. Which initial action is most appropriate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A fixed line appearing in the same location on every scan can be caused by contamination or a mark along the optical scanning path.
• Cleaning and inspecting the scanner glass is a sensible first troubleshooting step before assuming major electronic failure.
• CPU, SSD and monitor settings do not directly explain a repeatable physical scan-line artifact.
• Cleaning and inspecting the scanner glass is a sensible first troubleshooting step before assuming major electronic failure.
• CPU, SSD and monitor settings do not directly explain a repeatable physical scan-line artifact.
వివరణ:
Question 19
ప్రశ్న 19
Consider the following statements:
1. A digital camera is an image-capture input device.
2. A scanner converts physical documents or photographs into digital image data.
3. OCR can convert recognized characters in a scanned document into editable text.
4. A flatbed scanner normally requires every original to pass through feed rollers.
Which statements are correct?
1. A digital camera is an image-capture input device.
2. A scanner converts physical documents or photographs into digital image data.
3. OCR can convert recognized characters in a scanned document into editable text.
4. A flatbed scanner normally requires every original to pass through feed rollers.
Which statements are correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Statements 1 and 2 correctly describe digital cameras and scanners as image-input technologies.
• OCR can recognize printed characters from a scanned image and convert them to text, so Statement 3 is correct.
• A flatbed scanner places the original on a stationary platen rather than requiring it to pass through feed rollers, so Statement 4 is incorrect.
• OCR can recognize printed characters from a scanned image and convert them to text, so Statement 3 is correct.
• A flatbed scanner places the original on a stationary platen rather than requiring it to pass through feed rollers, so Statement 4 is incorrect.
వివరణ:
Question 20
ప్రశ్న 20
Match List I with List II:
List I
(a) Flatbed scanner
(b) Sheet-fed scanner
(c) OCR
(d) Digital camera
List II
1. Captures real-world scenes as digital images
2. Converts recognized scanned characters into machine-readable text
3. Uses a glass platen for scanning originals
4. Feeds loose pages through a scanning mechanism
Choose the correct matching code.
List I
(a) Flatbed scanner
(b) Sheet-fed scanner
(c) OCR
(d) Digital camera
List II
1. Captures real-world scenes as digital images
2. Converts recognized scanned characters into machine-readable text
3. Uses a glass platen for scanning originals
4. Feeds loose pages through a scanning mechanism
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A flatbed scanner uses a glass platen, giving (a)-3.
• A sheet-fed scanner feeds pages through its scanning mechanism, giving (b)-4.
• OCR converts recognized characters into machine-readable text, while a digital camera captures real-world scenes, giving (c)-2 and (d)-1.
• A sheet-fed scanner feeds pages through its scanning mechanism, giving (b)-4.
• OCR converts recognized characters into machine-readable text, while a digital camera captures real-world scenes, giving (c)-2 and (d)-1.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: C. It captures visual scenes and converts them into digital image data that can be stored or transferred to a computer. సమాధానం: C.
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Question 2 ప్రశ్న 2Answer: A. Image sensor సమాధానం: A.
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Question 3 ప్రశ్న 3Answer: D. CCD and CMOS సమాధానం: D.
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Question 4 ప్రశ్న 4Answer: B. The sensor can capture images using approximately 24 million picture elements. సమాధానం: B.
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Question 5 ప్రశ్న 5Answer: B. Optical zoom uses the camera's lens system to magnify the scene, whereas digital zoom enlarges or crops image data electronically. సమాధానం: B.
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Question 6 ప్రశ్న 6Answer: D. Connecting it to the motherboard's ATX power connector సమాధానం: D.
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Question 7 ప్రశ్న 7Answer: A. Scanner సమాధానం: A.
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Question 8 ప్రశ్న 8Answer: C. Flatbed scanner సమాధానం: C.
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Question 9 ప్రశ్న 9Answer: A. Sheet-fed scanner with an automatic document feeder సమాధానం: A.
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Question 10 ప్రశ్న 10Answer: D. Flatbed scanner సమాధానం: D.
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Question 11 ప్రశ్న 11Answer: C. Dots per inch, a measure associated with spatial scanning resolution సమాధానం: C.
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Question 12 ప్రశ్న 12Answer: B. The 600 DPI setting samples the document more densely and can capture finer spatial detail. సమాధానం: B.
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Question 13 ప్రశ్న 13Answer: D. Optical resolution reflects the scanner hardware's actual capture capability, while interpolation can create additional image samples through software processing. సమాధానం: D.
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Question 14 ప్రశ్న 14Answer: A. Optical Character Recognition సమాధానం: A.
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Question 15 ప్రశ్న 15Answer: C. Barcode reader సమాధానం: C.
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Question 16 ప్రశ్న 16Answer: B. A faster hard-disk spindle speed సమాధానం: B.
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Question 17 ప్రశ్న 17Answer: B. Sheet-fed scanner సమాధానం: B.
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Question 18 ప్రశ్న 18Answer: C. Increase the monitor refresh rate. సమాధానం: C.
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Question 19 ప్రశ్న 19Answer: D. 1, 2, 3 and 4 సమాధానం: D.
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Question 20 ప్రశ్న 20Answer: A. (a)-3, (b)-4, (c)-2, (d)-1 సమాధానం: A.