Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
A desktop PC shows no LEDs, no fan movement and no response when the power button is pressed. Which should be checked FIRST as part of a systematic no-power diagnosis?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• When there is absolutely no sign of electrical power, the external power path should be verified before investigating later startup stages.
• The wall outlet or power source, power cable and PSU switch are basic first checks.
• Graphics, boot-order and operating-system faults normally occur only after the computer is receiving power.
• The wall outlet or power source, power cable and PSU switch are basic first checks.
• Graphics, boot-order and operating-system faults normally occur only after the computer is receiving power.
వివరణ:
Question 2
ప్రశ్న 2
A PC powers on and all fans rotate, but immediately after installing new RAM there is no display and the motherboard gives a memory-related POST indication. What is the most appropriate first action?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The fault appeared immediately after a memory change and the POST indication points specifically to memory initialization.
• Improperly seated or incompatible RAM can prevent POST from completing and produce a blank display.
• Formatting storage or changing display settings cannot correct a pre-boot memory fault.
• Improperly seated or incompatible RAM can prevent POST from completing and produce a blank display.
• Formatting storage or changing display settings cannot correct a pre-boot memory fault.
వివరణ:
Question 3
ప్రశ్న 3
Which observation most clearly distinguishes a 'no-power' condition from a 'no-boot' condition?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• No-power means the computer does not show normal power activity such as LEDs, fans or startup response.
• No-boot means the machine receives power and may even complete POST but does not successfully start the operating system.
• Correctly distinguishing the stage of failure is essential for efficient troubleshooting.
• No-boot means the machine receives power and may even complete POST but does not successfully start the operating system.
• Correctly distinguishing the stage of failure is essential for efficient troubleshooting.
వివరణ:
Question 4
ప్రశ్న 4
A desktop powers on but produces a repeating beep code before any operating-system screen appears. Which statement is the most appropriate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Firmware may use beep codes to report hardware initialization problems detected during POST.
• The exact pattern and meaning depend on the motherboard or BIOS/UEFI implementation.
• Because the indication occurs before normal operating-system loading, software corruption should not automatically be assumed.
• The exact pattern and meaning depend on the motherboard or BIOS/UEFI implementation.
• Because the indication occurs before normal operating-system loading, software corruption should not automatically be assumed.
వివరణ:
Question 5
ప్రశ్న 5
A computer has power and completes POST, and the SSD is detected in BIOS/UEFI. It then displays 'No bootable device'. Which area should be investigated first?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Successful POST and firmware detection of the SSD show that basic hardware initialization and drive detection have occurred.
• A 'No bootable device' message points toward boot-device selection or missing/damaged boot information.
• Cooling, keyboard and brightness settings do not determine whether a valid operating-system boot path is available.
• A 'No bootable device' message points toward boot-device selection or missing/damaged boot information.
• Cooling, keyboard and brightness settings do not determine whether a valid operating-system boot path is available.
వివరణ:
Question 6
ప్రశ్న 6
A PC worked correctly until a discrete graphics card was removed for cleaning and reinstalled. The system now powers on but has no display. Which troubleshooting action is most appropriate FIRST?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The fault began immediately after the graphics card was handled, so its installation should be checked first.
• A partially seated card or missing auxiliary power connector can prevent correct graphics initialization.
• Operating-system and SATA settings should not be changed before checking the hardware that was just disturbed.
• A partially seated card or missing auxiliary power connector can prevent correct graphics initialization.
• Operating-system and SATA settings should not be changed before checking the hardware that was just disturbed.
వివరణ:
Question 7
ప్రశ్న 7
Consider the following troubleshooting principles:
1. Begin with the simplest and most likely causes.
2. Change several unrelated components simultaneously to save time.
3. Verify the result after each corrective action.
4. Use symptoms to identify the stage at which failure occurs.
Which statements are correct?
1. Begin with the simplest and most likely causes.
2. Change several unrelated components simultaneously to save time.
3. Verify the result after each corrective action.
4. Use symptoms to identify the stage at which failure occurs.
Which statements are correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Effective troubleshooting normally starts with simple, likely causes and proceeds systematically.
• Only one relevant change should preferably be made at a time so its effect can be evaluated.
• Verification after each action and identification of the failure stage help isolate the actual fault.
• Only one relevant change should preferably be made at a time so its effect can be evaluated.
• Verification after each action and identification of the failure stage help isolate the actual fault.
వివరణ:
Question 8
ప్రశ్న 8
A computer powers on and displays the manufacturer's firmware screen, but the system freezes before the operating system begins loading. Which conclusion is most reasonable?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Displaying the firmware screen proves that the computer has received power and progressed through part of the startup process.
• Troubleshooting should therefore move beyond basic no-power checks and focus on the point at which startup stops.
• The visible firmware screen also shows that the monitor is capable of producing output.
• Troubleshooting should therefore move beyond basic no-power checks and focus on the point at which startup stops.
• The visible firmware screen also shows that the monitor is capable of producing output.
వివరణ:
Question 9
ప్రశ్న 9
A newly assembled computer starts for a few seconds and then shuts itself down. CPU temperature in firmware rises abnormally fast. Which fault should be suspected first?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Rapid processor-temperature increase strongly suggests inadequate transfer of heat from the CPU to its cooler.
• Incorrect heat-sink seating, missing thermal interface material or installation errors can cause thermal shutdown.
• Keyboard, printer and boot-order settings do not produce rapid CPU overheating.
• Incorrect heat-sink seating, missing thermal interface material or installation errors can cause thermal shutdown.
• Keyboard, printer and boot-order settings do not produce rapid CPU overheating.
వివరణ:
Question 10
ప్రశ్న 10
A technician suspects that a faulty power supply is causing intermittent shutdowns. Which diagnostic method is most appropriate among the following?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Substitution with a known-good compatible PSU is an effective method of isolating a suspected power-supply fault.
• Suitable diagnostic equipment can also be used to verify PSU output behaviour.
• Replacing unrelated hardware or changing storage and firewall settings does not directly test the suspected PSU.
• Suitable diagnostic equipment can also be used to verify PSU output behaviour.
• Replacing unrelated hardware or changing storage and firewall settings does not directly test the suspected PSU.
వివరణ:
Question 11
ప్రశ్న 11
Which of the following should generally be considered when a PC powers on but produces no display?
1. Monitor power and selected input source
2. Display cable connection
3. RAM seating
4. Graphics adapter seating or power where applicable
1. Monitor power and selected input source
2. Display cable connection
3. RAM seating
4. Graphics adapter seating or power where applicable
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A no-display fault can arise from the display itself, cabling, memory initialization or the graphics subsystem.
• All four checks are therefore relevant in a systematic diagnosis.
• The order of testing may depend on recent hardware changes and any POST diagnostic information.
• All four checks are therefore relevant in a systematic diagnosis.
• The order of testing may depend on recent hardware changes and any POST diagnostic information.
వివరణ:
Question 12
ప్రశ్న 12
Match the symptom with the most relevant initial diagnostic area:
(a) No fans or LEDs
(b) Repeating memory-related POST indication
(c) 'No bootable device' after drive detection
(d) CPU temperature rises rapidly
1. RAM installation
2. Power path/PSU
3. CPU cooling
4. Boot configuration/boot information
Choose the correct matching code.
(a) No fans or LEDs
(b) Repeating memory-related POST indication
(c) 'No bootable device' after drive detection
(d) CPU temperature rises rapidly
1. RAM installation
2. Power path/PSU
3. CPU cooling
4. Boot configuration/boot information
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• No fans or LEDs first points toward the system power path, giving (a)-2.
• A memory POST indication points toward RAM, giving (b)-1.
• A detected drive with no bootable device points toward boot configuration or boot information, while rapid CPU heating points toward cooling, giving (c)-4 and (d)-3.
• A memory POST indication points toward RAM, giving (b)-1.
• A detected drive with no bootable device points toward boot configuration or boot information, while rapid CPU heating points toward cooling, giving (c)-4 and (d)-3.
వివరణ:
Question 13
ప్రశ్న 13
Assertion (A): Reinstalling the operating system should not normally be the first response to a PC that fails POST.
Reason (R): POST occurs before normal operating-system loading and a POST failure generally indicates a hardware or hardware-initialization problem.
Choose the correct answer.
Reason (R): POST occurs before normal operating-system loading and a POST failure generally indicates a hardware or hardware-initialization problem.
Choose the correct answer.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• POST is carried out before the operating system normally loads.
• A POST failure therefore needs investigation at the hardware, connection or firmware-initialization level first.
• Reinstalling the operating system cannot ordinarily correct a fault that prevents the computer from reaching the operating-system boot stage.
• A POST failure therefore needs investigation at the hardware, connection or firmware-initialization level first.
• Reinstalling the operating system cannot ordinarily correct a fault that prevents the computer from reaching the operating-system boot stage.
వివరణ:
Question 14
ప్రశ్న 14
A newly added expansion card causes a previously working PC to fail during POST. What is the most appropriate diagnostic approach?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• When a problem begins immediately after a hardware modification, the changed component should be tested first.
• Removing or reseating the card helps determine whether the new hardware, its installation or compatibility is responsible.
• CPU replacement, disk formatting and voltage changes would introduce unnecessary variables.
• Removing or reseating the card helps determine whether the new hardware, its installation or compatibility is responsible.
• CPU replacement, disk formatting and voltage changes would introduce unnecessary variables.
వివరణ:
Question 15
ప్రశ్న 15
A PC turns on and reaches the operating-system loading screen but repeatedly restarts before the desktop appears. Which statement is most appropriate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Reaching the operating-system loading screen shows that power-on, firmware startup and at least part of the boot process have already occurred.
• Troubleshooting should focus on the stage where restart occurs, including boot files, drivers and hardware stability.
• A PSU can still cause instability even when it provides enough power for fans to rotate.
• Troubleshooting should focus on the stage where restart occurs, including boot files, drivers and hardware stability.
• A PSU can still cause instability even when it provides enough power for fans to rotate.
వివరణ:
Question 16
ప్రశ్న 16
Which troubleshooting practice best helps determine whether a POST failure is caused by a nonessential component?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Minimal-configuration testing removes unnecessary variables and helps establish whether the basic system can POST.
• Nonessential components can then be reintroduced individually until the fault reappears.
• Changing several things simultaneously makes identification of the actual cause more difficult.
• Nonessential components can then be reintroduced individually until the fault reappears.
• Changing several things simultaneously makes identification of the actual cause more difficult.
వివరణ:
Question 17
ప్రశ్న 17
The system clock repeatedly loses its date and time after the PC is unplugged, but the machine otherwise boots correctly. Which component should be checked?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The motherboard battery supplies backup power for the real-time clock when normal system power is unavailable.
• A depleted battery can therefore cause time and related firmware settings to reset after the PC is unplugged.
• Graphics, cooling and SATA data components do not provide this backup function.
• A depleted battery can therefore cause time and related firmware settings to reset after the PC is unplugged.
• Graphics, cooling and SATA data components do not provide this backup function.
వివరణ:
Question 18
ప్రశ్న 18
A desktop has power, but after RAM is replaced the motherboard's diagnostic indicator remains on 'DRAM'. Which action is most appropriate before replacing the motherboard?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A DRAM diagnostic indication specifically directs troubleshooting toward memory detection or initialization.
• Compatibility, seating, individual modules and appropriate slots should be tested before concluding that the motherboard is defective.
• Operating-system, monitor and boot-priority changes occur outside the immediate memory-initialization problem.
• Compatibility, seating, individual modules and appropriate slots should be tested before concluding that the motherboard is defective.
• Operating-system, monitor and boot-priority changes occur outside the immediate memory-initialization problem.
వివరణ:
Question 19
ప్రశ్న 19
Which sequence represents the most systematic troubleshooting approach for a hardware startup problem?
1. Identify and verify the symptom.
2. Check simple and likely causes.
3. Isolate the suspected component or subsystem.
4. Apply one appropriate corrective action.
5. Test whether normal operation has been restored.
1. Identify and verify the symptom.
2. Check simple and likely causes.
3. Isolate the suspected component or subsystem.
4. Apply one appropriate corrective action.
5. Test whether normal operation has been restored.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Troubleshooting begins by clearly identifying the actual symptom rather than assuming a cause.
• Simple checks and systematic isolation narrow the fault before corrective action is taken.
• The final step is verification that the repair actually restored normal operation.
• Simple checks and systematic isolation narrow the fault before corrective action is taken.
• The final step is verification that the repair actually restored normal operation.
వివరణ:
Question 20
ప్రశ్న 20
A computer does not start when the cabinet power button is pressed, but the motherboard standby LED is illuminated. Which should be checked next before assuming that the PSU has completely failed?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• An illuminated motherboard standby LED indicates that at least standby power is reaching the board.
• If pressing the cabinet button produces no startup response, the front-panel power-switch connection or switch itself becomes an important next check.
• Windows services and user settings are not active at this pre-start stage.
• If pressing the cabinet button produces no startup response, the front-panel power-switch connection or switch itself becomes an important next check.
• Windows services and user settings are not active at this pre-start stage.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: B. Verify the AC supply, power cable and PSU power switch సమాధానం: B.
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Question 2 ప్రశ్న 2Answer: C. Reseat the RAM and verify that the modules are compatible and installed in the correct slots సమాధానం: C.
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Question 3 ప్రశ్న 3Answer: A. In a no-power condition the system shows no normal electrical activity, whereas in a no-boot condition it may power on but fail to load the operating system. సమాధానం: A.
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Question 4 ప్రశ్న 4Answer: D. The firmware is reporting a POST-related hardware diagnostic condition whose exact meaning depends on the system. సమాధానం: D.
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Question 5 ప్రశ్న 5Answer: B. Boot order, boot entry and the presence of valid boot information on the system drive సమాధానం: B.
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Question 6 ప్రశ్న 6Answer: D. Reseat the graphics card and verify any required auxiliary PCIe power connection. సమాధానం: D.
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Question 7 ప్రశ్న 7Answer: A. 1, 3 and 4 only సమాధానం: A.
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Question 8 ప్రశ్న 8Answer: C. The system has progressed beyond the initial no-power stage, so boot-path or later startup problems should now be investigated. సమాధానం: C.
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Question 9 ప్రశ్న 9Answer: D. Improper CPU cooler installation or poor thermal contact సమాధానం: D.
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Question 10 ప్రశ్న 10Answer: B. Test with a known-good compatible PSU or use appropriate power-supply diagnostic equipment. సమాధానం: B.
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Question 11 ప్రశ్న 11Answer: A. 1, 2, 3 and 4 సమాధానం: A.
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Question 12 ప్రశ్న 12Answer: C. (a)-2, (b)-1, (c)-4, (d)-3 సమాధానం: C.
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Question 13 ప్రశ్న 13Answer: D. Both A and R are true, and R is the correct explanation of A. సమాధానం: D.
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Question 14 ప్రశ్న 14Answer: B. Remove or reseat the newly installed card and test whether the original configuration restores normal POST. సమాధానం: B.
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Question 15 ప్రశ్న 15Answer: C. The computer has passed at least the earliest startup stages; later boot, driver, system-file or hardware-stability issues should be investigated. సమాధానం: C.
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Question 16 ప్రశ్న 16Answer: A. Start with a minimal hardware configuration and add nonessential components back one at a time. సమాధానం: A.
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Question 17 ప్రశ్న 17Answer: D. CMOS/RTC battery సమాధానం: D.
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Question 18 ప్రశ్న 18Answer: C. Verify RAM compatibility, try proper reseating and test supported modules/slots systematically. సమాధానం: C.
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Question 19 ప్రశ్న 19Answer: A. 1 → 2 → 3 → 4 → 5 సమాధానం: A.
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Question 20 ప్రశ్న 20Answer: B. Front-panel power-switch connection and the power-switch circuit సమాధానం: B.