Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
What is the primary function of a sound card or audio adapter in a computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A sound card or audio adapter handles audio-related input and output functions.
• It provides connections and processing for devices such as microphones, headphones and speakers.
• Network, storage and video-processing functions are handled by other hardware components.
• It provides connections and processing for devices such as microphones, headphones and speakers.
• Network, storage and video-processing functions are handled by other hardware components.
వివరణ:
Question 2
ప్రశ్న 2
Which of the following is primarily an audio output device?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A speaker converts an electrical audio signal into audible sound and is therefore an output device.
• A microphone captures sound and functions as an input device.
• Scanners and cameras capture other forms of input rather than producing audio output.
• A microphone captures sound and functions as an input device.
• Scanners and cameras capture other forms of input rather than producing audio output.
వివరణ:
Question 3
ప్రశ్న 3
Which device is primarily used to convert sound waves such as speech into an electrical or digital signal for input to a computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A microphone captures acoustic sound waves and converts them into a signal that can be processed or recorded.
• It is therefore classified as an audio input device.
• Speakers perform the reverse general role by producing audible sound from an audio signal.
• It is therefore classified as an audio input device.
• Speakers perform the reverse general role by producing audible sound from an audio signal.
వివరణ:
Question 4
ప్రశ్న 4
During playback through an analog speaker connection, which component of the computer's audio system converts digital audio information into an analog signal?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DAC stands for Digital-to-Analog Converter.
• It converts digitally represented audio into an analog electrical signal suitable for an analog audio output path.
• ADC performs the opposite conversion and is used when analog input must be digitized.
• It converts digitally represented audio into an analog electrical signal suitable for an analog audio output path.
• ADC performs the opposite conversion and is used when analog input must be digitized.
వివరణ:
Question 5
ప్రశ్న 5
When an analog microphone signal is recorded by a computer, which conversion is required to represent that signal as digital audio data?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• An analog microphone produces an analog electrical representation of sound.
• An Analog-to-Digital Converter samples and converts this signal into digital values that can be processed or stored by the computer.
• Digital-to-analog conversion is instead used for analog audio playback.
• An Analog-to-Digital Converter samples and converts this signal into digital values that can be processed or stored by the computer.
• Digital-to-analog conversion is instead used for analog audio playback.
వివరణ:
Question 6
ప్రశ్న 6
Which statement most accurately distinguishes a typical microphone input from a line-level input on a sound card?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Conventional microphones often produce relatively low-level signals that require additional amplification.
• Line-level inputs are intended for stronger audio signals from equipment already providing line-level output.
• Using an unsuitable input can result in audio that is too weak, distorted or otherwise improperly recorded.
• Line-level inputs are intended for stronger audio signals from equipment already providing line-level output.
• Using an unsuitable input can result in audio that is too weak, distorted or otherwise improperly recorded.
వివరణ:
Question 7
ప్రశ్న 7
A computer's speakers were working correctly, but after an audio-driver change there is no sound. Which is the most appropriate initial troubleshooting approach?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• No-sound problems should first be investigated through basic audio settings, connections and the selected output device.
• Because the problem appeared after a driver change, the audio driver should also be verified or corrected.
• Replacing major hardware or formatting storage is not an appropriate first response.
• Because the problem appeared after a driver change, the audio driver should also be verified or corrected.
• Replacing major hardware or formatting storage is not an appropriate first response.
వివరణ:
Question 8
ప్రశ్న 8
In conventional stereo audio, how many independent audio channels are normally used?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Stereo audio normally consists of two channels: left and right.
• The separate channels help create directional and spatial differences in reproduced sound.
• A single channel is mono, while systems with more channels may be used for surround sound.
• The separate channels help create directional and spatial differences in reproduced sound.
• A single channel is mono, while systems with more channels may be used for surround sound.
వివరణ:
Question 9
ప్రశ్న 9
Which of the following is correctly classified as an audio output connection in a typical computer audio system?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A headphone connection carries an audio output signal from the computer to headphones.
• A microphone connection is generally used for audio input.
• Scanner and keyboard interfaces serve non-audio input functions.
• A microphone connection is generally used for audio input.
• Scanner and keyboard interfaces serve non-audio input functions.
వివరణ:
Question 10
ప్రశ్న 10
In computer audio, the term 'full-duplex' most appropriately refers to the ability to:
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Full-duplex audio allows input and output operations to occur simultaneously.
• For example, a system can capture microphone input while reproducing received audio during a voice conversation.
• The term does not refer to storage duplication or the number of speakers.
• For example, a system can capture microphone input while reproducing received audio during a voice conversation.
• The term does not refer to storage duplication or the number of speakers.
వివరణ:
Question 11
ప్రశ్న 11
A microphone placed close to active loudspeakers produces a loud repeating squeal or howling sound. What is the most likely cause?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Acoustic feedback occurs when sound from a speaker is captured by a microphone and repeatedly amplified through the same audio path.
• This loop can produce a loud tone or howling sound.
• Reducing microphone gain, changing microphone/speaker placement or lowering speaker volume can help control the problem.
• This loop can produce a loud tone or howling sound.
• Reducing microphone gain, changing microphone/speaker placement or lowering speaker volume can help control the problem.
వివరణ:
Question 12
ప్రశ్న 12
Which output on a computer sound card is generally appropriate for sending an analog audio signal to powered speakers or an external amplifier?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Line-out is intended to send an audio output signal from the computer to suitable external audio equipment.
• Powered speakers and amplifiers commonly accept such an output where compatible.
• Microphone input is an input connection, while PS/2 and SATA serve unrelated hardware functions.
• Powered speakers and amplifiers commonly accept such an output where compatible.
• Microphone input is an input connection, while PS/2 and SATA serve unrelated hardware functions.
వివరణ:
Question 13
ప్రశ్న 13
A USB headset contains headphones and a microphone and communicates digitally with the computer through USB. How should it best be classified?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The microphone portion of a headset provides audio input while the headphones provide audio output.
• A USB headset can therefore perform both functions through its USB audio interface.
• It is appropriately classified as an input/output multimedia peripheral.
• A USB headset can therefore perform both functions through its USB audio interface.
• It is appropriately classified as an input/output multimedia peripheral.
వివరణ:
Question 14
ప్రశ్న 14
A sound card is physically installed and detected by the operating system as an unknown audio device, but its normal audio functions are unavailable. What is most likely required?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A hardware device generally requires an appropriate driver so the operating system can communicate with and control it correctly.
• An unknown audio device often indicates that the required driver is absent or unsuitable.
• Monitor, storage and keyboard changes do not resolve a missing audio-driver problem.
• An unknown audio device often indicates that the required driver is absent or unsuitable.
• Monitor, storage and keyboard changes do not resolve a missing audio-driver problem.
వివరణ:
Question 15
ప్రశ్న 15
In digital audio, what does the sample rate primarily specify?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Digital audio represents a changing signal by measuring it at regular intervals.
• Sample rate specifies how many such samples are taken per second and is commonly expressed in hertz or kilohertz.
• It is distinct from speaker count, storage capacity and microphone dimensions.
• Sample rate specifies how many such samples are taken per second and is commonly expressed in hertz or kilohertz.
• It is distinct from speaker count, storage capacity and microphone dimensions.
వివరణ:
Question 16
ప్రశ్న 16
What does greater bit depth in digital audio primarily provide?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Bit depth determines the number of possible digital values available to represent the amplitude of each audio sample.
• More bits provide a larger set of representable amplitude levels.
• Bit depth is an audio-data characteristic rather than a display, disk-rotation or USB-port specification.
• More bits provide a larger set of representable amplitude levels.
• Bit depth is an audio-data characteristic rather than a display, disk-rotation or USB-port specification.
వివరణ:
Question 17
ప్రశ్న 17
A user reports no sound from otherwise functional speakers, and the operating system's speaker icon clearly indicates that audio is muted. What should be done first?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The visible mute condition directly explains why audio output is not being heard.
• The appropriate first step is to remove the mute condition and verify the volume setting.
• Hardware replacement should not be attempted before resolving this obvious configuration issue.
• The appropriate first step is to remove the mute condition and verify the volume setting.
• Hardware replacement should not be attempted before resolving this obvious configuration issue.
వివరణ:
Question 18
ప్రశ్న 18
A microphone is connected and detected, but an application records no voice. Which troubleshooting step is most appropriate before replacing hardware?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A detected microphone may still fail to record if the wrong input is selected, the input is muted, gain is too low or the application lacks microphone permission.
• These settings should be verified before assuming that the microphone hardware has failed.
• Display and storage settings do not directly control microphone recording.
• These settings should be verified before assuming that the microphone hardware has failed.
• Display and storage settings do not directly control microphone recording.
వివరణ:
Question 19
ప్రశ్న 19
Which pair is correctly matched?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A microphone captures sound for input into the computer.
• A speaker reproduces audio from the computer and therefore functions as an output device.
• A sound card manages audio functions rather than serving as storage, video-only or printer-control hardware.
• A speaker reproduces audio from the computer and therefore functions as an output device.
• A sound card manages audio functions rather than serving as storage, video-only or printer-control hardware.
వివరణ:
Question 20
ప్రశ్న 20
Match List I with List II:
List I
(a) Microphone
(b) Speaker
(c) DAC
(d) ADC
List II
1. Converts analog signal to digital data
2. Audio input device
3. Converts digital audio to analog signal
4. Audio output device
Choose the correct matching code.
List I
(a) Microphone
(b) Speaker
(c) DAC
(d) ADC
List II
1. Converts analog signal to digital data
2. Audio input device
3. Converts digital audio to analog signal
4. Audio output device
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A microphone is an audio input device, giving (a)-2.
• A speaker is an audio output device, giving (b)-4.
• DAC converts digital information to analog output, while ADC converts analog input to digital information, giving (c)-3 and (d)-1.
• A speaker is an audio output device, giving (b)-4.
• DAC converts digital information to analog output, while ADC converts analog input to digital information, giving (c)-3 and (d)-1.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: B. To process audio input and output and provide interfaces for devices such as speakers and microphones సమాధానం: B.
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Question 2 ప్రశ్న 2Answer: D. Speaker సమాధానం: D.
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Question 3 ప్రశ్న 3Answer: A. Microphone సమాధానం: A.
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Question 4 ప్రశ్న 4Answer: C. DAC సమాధానం: C.
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Question 5 ప్రశ్న 5Answer: A. Analog-to-digital conversion సమాధానం: A.
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Question 6 ప్రశ్న 6Answer: C. A microphone input commonly accepts a much lower-level signal and may provide additional amplification compared with line input. సమాధానం: C.
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Question 7 ప్రశ్న 7Answer: D. Check volume/mute settings, selected playback device, speaker connections and the audio driver. సమాధానం: D.
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Question 8 ప్రశ్న 8Answer: B. Two సమాధానం: B.
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Question 9 ప్రశ్న 9Answer: C. Headphone output సమాధానం: C.
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Question 10 ప్రశ్న 10Answer: A. Record audio input and play audio output simultaneously సమాధానం: A.
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Question 11 ప్రశ్న 11Answer: B. Acoustic feedback between the speakers and microphone సమాధానం: B.
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Question 12 ప్రశ్న 12Answer: D. Line-out సమాధానం: D.
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Question 13 ప్రశ్న 13Answer: D. A multimedia peripheral providing both audio input and audio output సమాధానం: D.
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Question 14 ప్రశ్న 14Answer: A. Installation of the appropriate audio-device driver సమాధానం: A.
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Question 15 ప్రశ్న 15Answer: C. How many samples of the audio signal are taken per second సమాధానం: C.
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Question 16 ప్రశ్న 16Answer: B. A greater number of possible amplitude values for each audio sample సమాధానం: B.
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Question 17 ప్రశ్న 17Answer: A. Unmute the audio and verify the volume level సమాధానం: A.
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Question 18 ప్రశ్న 18Answer: D. Check the selected recording device, microphone mute/gain settings and application microphone permission. సమాధానం: D.
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Question 19 ప్రశ్న 19Answer: B. Microphone — audio input; Speaker — audio output సమాధానం: B.
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Question 20 ప్రశ్న 20Answer: C. (a)-2, (b)-4, (c)-3, (d)-1 సమాధానం: C.