Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
What is the fundamental function of a modem in data communication?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A modem performs modulation and demodulation during data communication.
• In traditional modem communication, outgoing digital information is converted into a form suitable for transmission and incoming signals are converted back into digital data.
• The modem is a communication device rather than a storage, display or power-conversion device.
• In traditional modem communication, outgoing digital information is converted into a form suitable for transmission and incoming signals are converted back into digital data.
• The modem is a communication device rather than a storage, display or power-conversion device.
వివరణ:
Question 2
ప్రశ్న 2
The term MODEM is derived from which two words?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• MODEM is formed from the words Modulator and Demodulator.
• Modulation prepares information for transmission over the communication medium.
• Demodulation recovers the data from the received signal.
• Modulation prepares information for transmission over the communication medium.
• Demodulation recovers the data from the received signal.
వివరణ:
Question 3
ప్రశ్న 3
In a traditional dial-up modem connection, what happens during modulation?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Modulation converts the computer's outgoing information into a signal suitable for the communication channel.
• Traditional dial-up modems were designed to transmit data through ordinary telephone networks.
• The reverse operation at the receiving side is demodulation.
• Traditional dial-up modems were designed to transmit data through ordinary telephone networks.
• The reverse operation at the receiving side is demodulation.
వివరణ:
Question 4
ప్రశ్న 4
Which type of modem was traditionally used to establish an Internet connection through an ordinary switched telephone line by dialing a service provider?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A dial-up modem establishes communication by dialing through the traditional telephone network.
• Such connections were considerably slower than modern broadband technologies.
• Cable and fiber technologies use different communication infrastructures.
• Such connections were considerably slower than modern broadband technologies.
• Cable and fiber technologies use different communication infrastructures.
వివరణ:
Question 5
ప్రశ్న 5
What is the primary function of the SMPS in a desktop computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• SMPS stands for Switched-Mode Power Supply.
• A computer SMPS converts incoming AC mains electricity into regulated DC voltages required by internal components.
• It supplies power to devices such as the motherboard, processor, storage drives and expansion cards.
• A computer SMPS converts incoming AC mains electricity into regulated DC voltages required by internal components.
• It supplies power to devices such as the motherboard, processor, storage drives and expansion cards.
వివరణ:
Question 6
ప్రశ్న 6
The maximum output capability of a computer power supply is commonly specified primarily in:
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Electrical power is measured in watts.
• Desktop power supplies are commonly identified by ratings such as 450 W, 650 W or 750 W.
• Pixels, bytes and hertz measure display elements, data quantity and frequency respectively.
• Desktop power supplies are commonly identified by ratings such as 450 W, 650 W or 750 W.
• Pixels, bytes and hertz measure display elements, data quantity and frequency respectively.
వివరణ:
Question 7
ప్రశ్న 7
Which group contains common positive DC voltage rails historically provided by an ATX computer power supply?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• ATX computer power supplies commonly provide +3.3 V, +5 V and +12 V DC rails.
• Different components and circuits use these voltage levels according to their requirements.
• The power supply obtains these regulated DC outputs from the AC mains input.
• Different components and circuits use these voltage levels according to their requirements.
• The power supply obtains these regulated DC outputs from the AC mains input.
వివరణ:
Question 8
ప్రశ్న 8
Which power connector is normally used as the main power connection from a modern ATX SMPS to the motherboard?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Modern ATX motherboards normally receive their main power through a 24-pin ATX connector.
• This connector supplies several required voltage and control lines to the motherboard.
• SATA data, RJ-45 and HDMI connectors perform storage-data, network and display functions.
• This connector supplies several required voltage and control lines to the motherboard.
• SATA data, RJ-45 and HDMI connectors perform storage-data, network and display functions.
వివరణ:
Question 9
ప్రశ్న 9
A newly assembled PC has its 24-pin motherboard power connector attached, but the separate CPU power connector near the processor socket is not connected. Which connector was most likely omitted?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Modern motherboards normally require a dedicated ATX12V/EPS connection near the CPU socket.
• This connector supplies power for the processor's voltage-regulation circuitry.
• Omitting it can prevent the computer from starting or completing POST correctly.
• This connector supplies power for the processor's voltage-regulation circuitry.
• Omitting it can prevent the computer from starting or completing POST correctly.
వివరణ:
Question 10
ప్రశ్న 10
Which connector from an SMPS is normally used to supply power to a SATA HDD or SATA SSD?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• SATA storage drives normally require a SATA power connection from the power supply.
• A separate SATA data cable connects the drive to the motherboard or storage controller.
• RJ-45, DisplayPort and PS/2 connectors serve network, display and legacy input-device functions.
• A separate SATA data cable connects the drive to the motherboard or storage controller.
• RJ-45, DisplayPort and PS/2 connectors serve network, display and legacy input-device functions.
వివరణ:
Question 11
ప్రశ్న 11
A high-performance discrete graphics card requires more electrical power than the PCI Express slot alone is designed to provide. Which connection may therefore be required?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Many high-power graphics cards require one or more auxiliary PCI Express power connections from the PSU.
• These connections supplement the electrical power available through the motherboard's PCI Express slot.
• SATA data and PS/2 connectors are not designed to provide graphics-card operating power.
• These connections supplement the electrical power available through the motherboard's PCI Express slot.
• SATA data and PS/2 connectors are not designed to provide graphics-card operating power.
వివరణ:
Question 12
ప్రశ్న 12
A PC works normally during light use but suddenly shuts down or restarts when a high-performance graphics application heavily loads both the CPU and GPU. Which power-related cause should be considered?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• CPU and GPU workloads can substantially increase a computer's electrical-power demand.
• An insufficient or deteriorating PSU may become unstable when the total load rises.
• Power capacity and PSU condition should therefore be checked when shutdowns repeatedly occur under heavy hardware load.
• An insufficient or deteriorating PSU may become unstable when the total load rises.
• Power capacity and PSU condition should therefore be checked when shutdowns repeatedly occur under heavy hardware load.
వివరణ:
Question 13
ప్రశ్న 13
A desktop computer shows no lights, no fans and no response when the power button is pressed. Which is the most appropriate initial power-related troubleshooting step?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A completely dead system should first be checked for basic electrical-power availability.
• The wall outlet, AC cable, PSU rear switch and internal motherboard power connections are logical initial checks.
• Operating-system and storage issues cannot explain the complete absence of basic electrical activity.
• The wall outlet, AC cable, PSU rear switch and internal motherboard power connections are logical initial checks.
• Operating-system and storage issues cannot explain the complete absence of basic electrical activity.
వివరణ:
Question 14
ప్రశ్న 14
A peripheral operates from 12 V and draws 3 A. Assuming these are DC operating values, what electrical power does it consume?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Electrical power is calculated using P = V × I.
• Therefore P = 12 V × 3 A = 36 W.
• The peripheral consumes 36 watts under the stated operating conditions.
• Therefore P = 12 V × 3 A = 36 W.
• The peripheral consumes 36 watts under the stated operating conditions.
వివరణ:
Question 15
ప్రశ్న 15
Which statement correctly describes power conversion in a typical desktop-computer SMPS?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A desktop SMPS receives AC electricity from the mains supply.
• Its output side provides regulated DC voltage rails required by computer electronics.
• Internal computer components are not normally powered directly from mains AC.
• Its output side provides regulated DC voltage rails required by computer electronics.
• Internal computer components are not normally powered directly from mains AC.
వివరణ:
Question 16
ప్రశ్న 16
Which device is primarily intended to provide temporary backup electrical power to a computer when the mains supply fails?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• UPS stands for Uninterruptible Power Supply.
• It can provide temporary backup power when the normal mains supply fails, allowing continued short-term operation or orderly shutdown.
• An SMPS converts power for computer components but does not by itself provide battery-backed operation during an outage.
• It can provide temporary backup power when the normal mains supply fails, allowing continued short-term operation or orderly shutdown.
• An SMPS converts power for computer components but does not by itself provide battery-backed operation during an outage.
వివరణ:
Question 17
ప్రశ్న 17
Which statement concerning USB peripheral power is generally correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• USB was designed to support data transfer and can also supply electrical power to compatible connected devices.
• Many low-power peripherals such as mice, keyboards and some external devices can operate from USB power.
• The available power depends on the USB standard, port and negotiated device requirements.
• Many low-power peripherals such as mice, keyboards and some external devices can operate from USB power.
• The available power depends on the USB standard, port and negotiated device requirements.
వివరణ:
Question 18
ప్రశ్న 18
A peripheral requires a 5 V DC input, but an incompatible adapter supplying a substantially higher voltage is connected. What is the main hardware risk?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Electronic devices are designed to operate within specified voltage ranges.
• Applying substantially excessive voltage can over-stress or damage internal components.
• Replacement adapters should therefore satisfy the device manufacturer's voltage, polarity and current requirements.
• Applying substantially excessive voltage can over-stress or damage internal components.
• Replacement adapters should therefore satisfy the device manufacturer's voltage, polarity and current requirements.
వివరణ:
Question 19
ప్రశ్న 19
What is an important purpose of protective grounding in computer power systems?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Protective grounding provides a low-resistance path for certain electrical fault currents.
• Proper grounding helps protective devices operate and reduces the risk of dangerous exposed voltages.
• Grounding is an electrical-safety feature rather than a performance or storage feature.
• Proper grounding helps protective devices operate and reduces the risk of dangerous exposed voltages.
• Grounding is an electrical-safety feature rather than a performance or storage feature.
వివరణ:
Question 20
ప్రశ్న 20
Match List I with List II:
List I
(a) Modem
(b) SMPS
(c) UPS
(d) SATA power connector
List II
1. Supplies power to compatible SATA storage devices
2. Provides temporary backup power during a mains failure
3. Performs modulation and demodulation for data communication
4. Converts AC input into regulated DC outputs for computer components
Choose the correct matching code.
List I
(a) Modem
(b) SMPS
(c) UPS
(d) SATA power connector
List II
1. Supplies power to compatible SATA storage devices
2. Provides temporary backup power during a mains failure
3. Performs modulation and demodulation for data communication
4. Converts AC input into regulated DC outputs for computer components
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A modem performs modulation and demodulation, giving (a)-3.
• An SMPS converts AC mains power into regulated DC outputs, giving (b)-4.
• A UPS provides temporary backup power and a SATA power connector supplies compatible storage devices, giving (c)-2 and (d)-1.
• An SMPS converts AC mains power into regulated DC outputs, giving (b)-4.
• A UPS provides temporary backup power and a SATA power connector supplies compatible storage devices, giving (c)-2 and (d)-1.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: D. To perform modulation and demodulation so that data can be transmitted over an appropriate communication medium సమాధానం: D.
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Question 2 ప్రశ్న 2Answer: B. Modulator and Demodulator సమాధానం: B.
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Question 3 ప్రశ్న 3Answer: A. Computer data is converted into a signal form suitable for transmission over the telephone line. సమాధానం: A.
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Question 4 ప్రశ్న 4Answer: C. Dial-up modem సమాధానం: C.
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Question 5 ప్రశ్న 5Answer: C. To convert incoming AC power into regulated DC outputs required by computer components సమాధానం: C.
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Question 6 ప్రశ్న 6Answer: A. Watts సమాధానం: A.
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Question 7 ప్రశ్న 7Answer: D. +3.3 V, +5 V and +12 V సమాధానం: D.
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Question 8 ప్రశ్న 8Answer: B. 24-pin ATX motherboard power connector సమాధానం: B.
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Question 9 ప్రశ్న 9Answer: A. 4-pin or 8-pin ATX12V/EPS CPU power connector సమాధానం: A.
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Question 10 ప్రశ్న 10Answer: C. SATA power connector సమాధానం: C.
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Question 11 ప్రశ్న 11Answer: B. Auxiliary PCI Express power connector from the PSU సమాధానం: B.
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Question 12 ప్రశ్న 12Answer: D. An inadequate, failing or overloaded power supply సమాధానం: D.
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Question 13 ప్రశ్న 13Answer: C. Check the AC outlet, power cable, PSU switch and major power connections. సమాధానం: C.
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Question 14 ప్రశ్న 14Answer: A. 36 W సమాధానం: A.
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Question 15 ప్రశ్న 15Answer: D. It accepts AC mains input and provides regulated low-voltage DC outputs for computer hardware. సమాధానం: D.
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Question 16 ప్రశ్న 16Answer: B. UPS సమాధానం: B.
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Question 17 ప్రశ్న 17Answer: B. A USB connection can provide both data communication and electrical power to compatible peripherals within the supported power limits. సమాధానం: B.
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Question 18 ప్రశ్న 18Answer: D. The excessive voltage may damage the peripheral's electronic circuitry. సమాధానం: D.
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Question 19 ప్రశ్న 19Answer: C. To provide a safer path for fault current and reduce electric-shock risk under fault conditions సమాధానం: C.
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Question 20 ప్రశ్న 20Answer: A. (a)-3, (b)-4, (c)-2, (d)-1 సమాధానం: A.