CompTIA A+ Core 1 (220-1001) | Full Access Answered 2026/2027 | IT Fundamentals Certification Prep 200-Question Comprehensive Exam
CompTIA A+ Certification Exam
Core 1 v1.0 (220-1001) — Full Access Answered 2026/2027
200 Questions • Multiple Choice • Comprehensive Blueprint Coverage
Examination Overview: This 200-question comprehensive exam is aligned with the 2026/2027 CompTIA A+ Core 1
(220-1001) exam blueprint. The official Core 1 domain weighting is: Mobile Devices 14%, Networking 23%, Hardware
25%, Virtualization and Cloud Computing 11%, and Hardware and Network Troubleshooting 27%. Additional domains
covered in this study bank (Operating Systems, Security, and Operational Procedures) appear on the CompTIA A+
Core 2 (220-1002) exam but are included here for comprehensive IT fundamentals preparation as commonly reviewed
in A+ study programs. Each question includes a complete correct answer and a detailed rationale that doubles as
study-guide content, providing technical specifications, protocol standards, troubleshooting methodology, and best
practices. The cognitive distribution is approximately 30% recall (specifications, protocols, procedures), 50%
application (scenario-based diagnostic and procedural decisions), and 20% analysis (prioritization, problem-solving, and
critical reasoning), mirroring the actual A+ Core 1 exam structure. Distractors are designed to reflect the most common
A+ Core 1 exam pitfalls: confusing port numbers, mixing up Wi-Fi standards and frequencies, misidentifying RAM
types, confusing RAID levels, misapplying troubleshooting steps, incorrect malware removal sequence, wrong OS tool
selection, misunderstanding cloud service models, and confusing connector types. Mastering both the correct answer
and the reasoning behind each distractor is the key to scoring at or above the CompTIA A+ passing standard of 675 (on
a 100-900 scale).
Section 1: Mobile Devices (Laptop Hardware, Displays, Features, &
Connectivity) — Q1–Q25
Q1: A user reports that their laptop screen is very dim, but an external monitor displays normally when
connected. The image is barely visible on the laptop panel when shining a flashlight at it. Which
component is MOST likely failing?
A. The LCD panel itself
B. The inverter (on older CCFL-backlit LCDs) or the LED backlight strip [CORRECT]
C. The GPU/video card
D. The LCD ribbon cable
Correct Answer: B
Rationale: When an external monitor displays correctly, the GPU is functioning normally and the issue is localized to the
laptop's built-in display. A faint, barely-visible image when illuminated with a flashlight indicates the backlight (which lights
the LCD panel from behind) is not functioning. On older laptops with cold-cathode fluorescent lamp (CCFL) backlights, the
inverter (which converts DC to high-voltage AC to drive the CCFL tube) is the most common failure point. On modern
laptops with LED backlights, the inverter is absent; the LED backlight strip itself or the display assembly fails. Replacing the
inverter was a common repair on pre-2010 laptops; today, replacing the entire LCD/backlight assembly is standard. Option A
(LCD panel) would produce a completely black, distorted, or cracked image; an external monitor test rules out GPU problems
(Option C). Option D (ribbon cable) failure usually causes flickering, color distortion, or complete image loss, not just
dimness.
Page 1
,CompTIA A+ Core 1 (220-1001) | Full Access Answered 2026/2027 | IT Fundamentals Certification Prep 200-Question Comprehensive Exam
Q2: A user wants to connect an external monitor, a wired network, and a USB keyboard to a laptop that
only has USB-C ports. Which single accessory would BEST enable all of these connections through one
laptop port?
A. A USB-C to USB-A adapter
B. A USB-C dock/docking station (with HDMI/DisplayPort, Ethernet, and USB-A ports) [CORRECT]
C. A USB-C to HDMI cable only
D. A Thunderbolt 3 to Ethernet adapter
Correct Answer: B
Rationale: A USB-C dock (also called a port replicator or docking station) connects to a single USB-C port on the laptop and
provides multiple output ports, including HDMI or DisplayPort for video, an RJ-45 jack for wired Ethernet, and USB-A ports
for legacy peripherals. Many docks also provide power delivery (PD) to charge the laptop through the same cable. Option A
(USB-C to USB-A adapter) only converts to a single USB-A port and does not support the external monitor or Ethernet
requirement. Option C (USB-C to HDMI cable) supports only video. Option D (Thunderbolt 3 to Ethernet) supports only the
network connection. USB-C docks may be Thunderbolt 3, Thunderbolt 4, USB 3.1 Gen 1/2, or USB4 compliant; for
guaranteed compatibility with dual displays and high bandwidth, Thunderbolt 3/4 or USB4 docks are preferred.
Q3: A technician is upgrading the RAM in a laptop. The existing memory modules are
smaller-than-DIMM form factor sticks designed specifically for laptops. Which type of memory module is
MOST likely installed?
A. DIMM (Dual In-line Memory Module)
B. SODIMM (Small Outline DIMM) [CORRECT]
C. MicroDIMM
D. RDIMM (Registered DIMM)
Correct Answer: B
Rationale: SODIMM (Small Outline Dual In-line Memory Module) is the standard memory form factor for laptops,
all-in-one PCs, small-form-factor desktops, and some printers. SODIMMs are roughly half the physical length of standard
DIMMs (about 2.66 inches vs. 5.25 inches) and use a 204-pin (DDR3), 260-pin (DDR4), or 262-pin (DDR5) connector.
Option A (DIMM) is the standard desktop form factor. Option C (MicroDIMM) is an older, smaller form factor used in some
subnotebooks; rarely encountered today. Option D (RDIMM) is registered/buffered memory used in servers and workstations
for stability with large memory configurations. Always verify the laptop supports user-upgradeable RAM before ordering
parts; many ultrabooks (e.g., Apple MacBook, Dell XPS 13) have RAM soldered to the motherboard and cannot be upgraded.
Page 2
,CompTIA A+ Core 1 (220-1001) | Full Access Answered 2026/2027 | IT Fundamentals Certification Prep 200-Question Comprehensive Exam
Q4: A laptop user presses the Fn key together with a key showing a sun icon and an up arrow. What is the
MOST likely effect?
A. Toggle the display between laptop panel and external monitor
B. Increase the screen brightness [CORRECT]
C. Toggle Wi-Fi on or off
D. Toggle the touchpad on or off
Correct Answer: B
Rationale: Laptops use the Fn (function) key in combination with other keys to access secondary functions, often displayed
as small icons on the lower portion of the keycaps. A sun icon with an up arrow universally indicates increasing display
brightness; the corresponding down-arrow key decreases brightness. Option A (display toggle) is usually shown as a monitor
icon or a laptop-with-monitor icon. Option C (Wi-Fi toggle) is typically shown as a radio tower or antenna icon. Option D
(touchpad toggle) is typically shown as a finger on a touchpad or a slashed touchpad icon. Other common Fn combinations:
airplane mode (airplane icon), mute/speaker volume (speaker icon), keyboard backlight brightness, sleep, and media transport
keys (play, pause, skip). Knowing the universal icon conventions helps the technician assist users without consulting
documentation.
Q5: A user reports that the laptop battery is not charging even when the AC adapter is connected. The
laptop operates normally on AC power but shuts down immediately when unplugged. Which is the FIRST
troubleshooting step?
A. Replace the battery
B. Verify that the AC adapter is the correct one for the laptop and that the DC connector is fully inserted;
check the LED indicator on the AC adapter (if present) and the laptop's charging LED [CORRECT]
C. Replace the motherboard power connector
D. Update the BIOS
Correct Answer: B
Rationale: The first step in troubleshooting a no-charge condition is verifying the AC adapter is the correct one for the laptop
model and is functioning properly. The adapter's output voltage, amperage, and connector tip must match the laptop's
requirements; using a different adapter may not charge the battery or could damage the laptop. The DC connector must be
fully inserted; loose or damaged DC jacks are a common cause of charging failure. An LED on the AC adapter brick (when
present) confirms the adapter is receiving AC power; a charging LED on the laptop confirms power is reaching the charging
circuit. If the adapter is confirmed correct and functional and the laptop still doesn't charge, the next steps would be: try a
different known-good adapter (isolating adapter vs. laptop fault), test the battery in another laptop if possible, check the DC
jack for looseness or damage, and finally consider battery or motherboard replacement. Option A (replace battery) assumes
the diagnosis before verification. Option C is premature; DC jack failure is possible but should be assessed after confirming
adapter functionality. Option D (BIOS update) is rarely the cause but may be a last resort.
Page 3
, CompTIA A+ Core 1 (220-1001) | Full Access Answered 2026/2027 | IT Fundamentals Certification Prep 200-Question Comprehensive Exam
Q6: Which type of laptop display technology uses organic compounds that emit light when an electric
current is applied, allowing each pixel to turn on/off individually for true blacks and high contrast?
A. LCD (Liquid Crystal Display) with CCFL backlight
B. OLED (Organic Light-Emitting Diode) [CORRECT]
C. Plasma display
D. CRT (Cathode Ray Tube)
Correct Answer: B
Rationale: OLED (Organic Light-Emitting Diode) displays use organic compounds that emit light directly when an electric
current is applied. Each pixel is self-emissive, meaning it can be turned completely off for true blacks and effectively infinite
contrast ratio. OLED displays are thinner, lighter, and more flexible than LCDs, with wider viewing angles and faster
response times. They are used in premium laptops, smartphones, and high-end televisions. Disadvantages include higher cost
and susceptibility to burn-in (image retention) with static images over time. Option A (LCD with CCFL) uses a cold-cathode
fluorescent backlight behind liquid crystals that block or pass light; it cannot produce true blacks because the backlight is
always on. Option C (plasma) is an older large-display technology (now obsolete) using gas discharge; it was used for
televisions, not laptops. Option D (CRT) is the bulky vacuum-tube technology used in older desktop monitors and televisions.
Q7: A user wants to charge an iPhone from a laptop's USB-C port. Which cable connector would be on the
iPhone end of the cable?
A. USB-C
B. Lightning [CORRECT]
C. Micro-USB
D. Mini-USB
Correct Answer: B
Rationale: Apple's iPhone (through iPhone 14) uses the proprietary Lightning connector, an 8-pin reversible dock connector
introduced in 2012. The cable would have USB-C on one end (to plug into the laptop's USB-C port) and Lightning on the
other (to plug into the iPhone). Apple's iPhone 15 (released September 2023) replaced Lightning with USB-C, complying
with European Union regulations requiring USB-C on small electronic devices. Option A (USB-C on both ends) would be
used for newer iPhones (15 and later) or for connecting USB-C devices. Option C (Micro-USB) is the older standard used on
many Android devices and accessories; it is being phased out in favor of USB-C. Option D (Mini-USB) is an even older
connector used on some cameras and older devices. The Lightning connector is reversible like USB-C, but they are not
interchangeable.
Page 4
CompTIA A+ Certification Exam
Core 1 v1.0 (220-1001) — Full Access Answered 2026/2027
200 Questions • Multiple Choice • Comprehensive Blueprint Coverage
Examination Overview: This 200-question comprehensive exam is aligned with the 2026/2027 CompTIA A+ Core 1
(220-1001) exam blueprint. The official Core 1 domain weighting is: Mobile Devices 14%, Networking 23%, Hardware
25%, Virtualization and Cloud Computing 11%, and Hardware and Network Troubleshooting 27%. Additional domains
covered in this study bank (Operating Systems, Security, and Operational Procedures) appear on the CompTIA A+
Core 2 (220-1002) exam but are included here for comprehensive IT fundamentals preparation as commonly reviewed
in A+ study programs. Each question includes a complete correct answer and a detailed rationale that doubles as
study-guide content, providing technical specifications, protocol standards, troubleshooting methodology, and best
practices. The cognitive distribution is approximately 30% recall (specifications, protocols, procedures), 50%
application (scenario-based diagnostic and procedural decisions), and 20% analysis (prioritization, problem-solving, and
critical reasoning), mirroring the actual A+ Core 1 exam structure. Distractors are designed to reflect the most common
A+ Core 1 exam pitfalls: confusing port numbers, mixing up Wi-Fi standards and frequencies, misidentifying RAM
types, confusing RAID levels, misapplying troubleshooting steps, incorrect malware removal sequence, wrong OS tool
selection, misunderstanding cloud service models, and confusing connector types. Mastering both the correct answer
and the reasoning behind each distractor is the key to scoring at or above the CompTIA A+ passing standard of 675 (on
a 100-900 scale).
Section 1: Mobile Devices (Laptop Hardware, Displays, Features, &
Connectivity) — Q1–Q25
Q1: A user reports that their laptop screen is very dim, but an external monitor displays normally when
connected. The image is barely visible on the laptop panel when shining a flashlight at it. Which
component is MOST likely failing?
A. The LCD panel itself
B. The inverter (on older CCFL-backlit LCDs) or the LED backlight strip [CORRECT]
C. The GPU/video card
D. The LCD ribbon cable
Correct Answer: B
Rationale: When an external monitor displays correctly, the GPU is functioning normally and the issue is localized to the
laptop's built-in display. A faint, barely-visible image when illuminated with a flashlight indicates the backlight (which lights
the LCD panel from behind) is not functioning. On older laptops with cold-cathode fluorescent lamp (CCFL) backlights, the
inverter (which converts DC to high-voltage AC to drive the CCFL tube) is the most common failure point. On modern
laptops with LED backlights, the inverter is absent; the LED backlight strip itself or the display assembly fails. Replacing the
inverter was a common repair on pre-2010 laptops; today, replacing the entire LCD/backlight assembly is standard. Option A
(LCD panel) would produce a completely black, distorted, or cracked image; an external monitor test rules out GPU problems
(Option C). Option D (ribbon cable) failure usually causes flickering, color distortion, or complete image loss, not just
dimness.
Page 1
,CompTIA A+ Core 1 (220-1001) | Full Access Answered 2026/2027 | IT Fundamentals Certification Prep 200-Question Comprehensive Exam
Q2: A user wants to connect an external monitor, a wired network, and a USB keyboard to a laptop that
only has USB-C ports. Which single accessory would BEST enable all of these connections through one
laptop port?
A. A USB-C to USB-A adapter
B. A USB-C dock/docking station (with HDMI/DisplayPort, Ethernet, and USB-A ports) [CORRECT]
C. A USB-C to HDMI cable only
D. A Thunderbolt 3 to Ethernet adapter
Correct Answer: B
Rationale: A USB-C dock (also called a port replicator or docking station) connects to a single USB-C port on the laptop and
provides multiple output ports, including HDMI or DisplayPort for video, an RJ-45 jack for wired Ethernet, and USB-A ports
for legacy peripherals. Many docks also provide power delivery (PD) to charge the laptop through the same cable. Option A
(USB-C to USB-A adapter) only converts to a single USB-A port and does not support the external monitor or Ethernet
requirement. Option C (USB-C to HDMI cable) supports only video. Option D (Thunderbolt 3 to Ethernet) supports only the
network connection. USB-C docks may be Thunderbolt 3, Thunderbolt 4, USB 3.1 Gen 1/2, or USB4 compliant; for
guaranteed compatibility with dual displays and high bandwidth, Thunderbolt 3/4 or USB4 docks are preferred.
Q3: A technician is upgrading the RAM in a laptop. The existing memory modules are
smaller-than-DIMM form factor sticks designed specifically for laptops. Which type of memory module is
MOST likely installed?
A. DIMM (Dual In-line Memory Module)
B. SODIMM (Small Outline DIMM) [CORRECT]
C. MicroDIMM
D. RDIMM (Registered DIMM)
Correct Answer: B
Rationale: SODIMM (Small Outline Dual In-line Memory Module) is the standard memory form factor for laptops,
all-in-one PCs, small-form-factor desktops, and some printers. SODIMMs are roughly half the physical length of standard
DIMMs (about 2.66 inches vs. 5.25 inches) and use a 204-pin (DDR3), 260-pin (DDR4), or 262-pin (DDR5) connector.
Option A (DIMM) is the standard desktop form factor. Option C (MicroDIMM) is an older, smaller form factor used in some
subnotebooks; rarely encountered today. Option D (RDIMM) is registered/buffered memory used in servers and workstations
for stability with large memory configurations. Always verify the laptop supports user-upgradeable RAM before ordering
parts; many ultrabooks (e.g., Apple MacBook, Dell XPS 13) have RAM soldered to the motherboard and cannot be upgraded.
Page 2
,CompTIA A+ Core 1 (220-1001) | Full Access Answered 2026/2027 | IT Fundamentals Certification Prep 200-Question Comprehensive Exam
Q4: A laptop user presses the Fn key together with a key showing a sun icon and an up arrow. What is the
MOST likely effect?
A. Toggle the display between laptop panel and external monitor
B. Increase the screen brightness [CORRECT]
C. Toggle Wi-Fi on or off
D. Toggle the touchpad on or off
Correct Answer: B
Rationale: Laptops use the Fn (function) key in combination with other keys to access secondary functions, often displayed
as small icons on the lower portion of the keycaps. A sun icon with an up arrow universally indicates increasing display
brightness; the corresponding down-arrow key decreases brightness. Option A (display toggle) is usually shown as a monitor
icon or a laptop-with-monitor icon. Option C (Wi-Fi toggle) is typically shown as a radio tower or antenna icon. Option D
(touchpad toggle) is typically shown as a finger on a touchpad or a slashed touchpad icon. Other common Fn combinations:
airplane mode (airplane icon), mute/speaker volume (speaker icon), keyboard backlight brightness, sleep, and media transport
keys (play, pause, skip). Knowing the universal icon conventions helps the technician assist users without consulting
documentation.
Q5: A user reports that the laptop battery is not charging even when the AC adapter is connected. The
laptop operates normally on AC power but shuts down immediately when unplugged. Which is the FIRST
troubleshooting step?
A. Replace the battery
B. Verify that the AC adapter is the correct one for the laptop and that the DC connector is fully inserted;
check the LED indicator on the AC adapter (if present) and the laptop's charging LED [CORRECT]
C. Replace the motherboard power connector
D. Update the BIOS
Correct Answer: B
Rationale: The first step in troubleshooting a no-charge condition is verifying the AC adapter is the correct one for the laptop
model and is functioning properly. The adapter's output voltage, amperage, and connector tip must match the laptop's
requirements; using a different adapter may not charge the battery or could damage the laptop. The DC connector must be
fully inserted; loose or damaged DC jacks are a common cause of charging failure. An LED on the AC adapter brick (when
present) confirms the adapter is receiving AC power; a charging LED on the laptop confirms power is reaching the charging
circuit. If the adapter is confirmed correct and functional and the laptop still doesn't charge, the next steps would be: try a
different known-good adapter (isolating adapter vs. laptop fault), test the battery in another laptop if possible, check the DC
jack for looseness or damage, and finally consider battery or motherboard replacement. Option A (replace battery) assumes
the diagnosis before verification. Option C is premature; DC jack failure is possible but should be assessed after confirming
adapter functionality. Option D (BIOS update) is rarely the cause but may be a last resort.
Page 3
, CompTIA A+ Core 1 (220-1001) | Full Access Answered 2026/2027 | IT Fundamentals Certification Prep 200-Question Comprehensive Exam
Q6: Which type of laptop display technology uses organic compounds that emit light when an electric
current is applied, allowing each pixel to turn on/off individually for true blacks and high contrast?
A. LCD (Liquid Crystal Display) with CCFL backlight
B. OLED (Organic Light-Emitting Diode) [CORRECT]
C. Plasma display
D. CRT (Cathode Ray Tube)
Correct Answer: B
Rationale: OLED (Organic Light-Emitting Diode) displays use organic compounds that emit light directly when an electric
current is applied. Each pixel is self-emissive, meaning it can be turned completely off for true blacks and effectively infinite
contrast ratio. OLED displays are thinner, lighter, and more flexible than LCDs, with wider viewing angles and faster
response times. They are used in premium laptops, smartphones, and high-end televisions. Disadvantages include higher cost
and susceptibility to burn-in (image retention) with static images over time. Option A (LCD with CCFL) uses a cold-cathode
fluorescent backlight behind liquid crystals that block or pass light; it cannot produce true blacks because the backlight is
always on. Option C (plasma) is an older large-display technology (now obsolete) using gas discharge; it was used for
televisions, not laptops. Option D (CRT) is the bulky vacuum-tube technology used in older desktop monitors and televisions.
Q7: A user wants to charge an iPhone from a laptop's USB-C port. Which cable connector would be on the
iPhone end of the cable?
A. USB-C
B. Lightning [CORRECT]
C. Micro-USB
D. Mini-USB
Correct Answer: B
Rationale: Apple's iPhone (through iPhone 14) uses the proprietary Lightning connector, an 8-pin reversible dock connector
introduced in 2012. The cable would have USB-C on one end (to plug into the laptop's USB-C port) and Lightning on the
other (to plug into the iPhone). Apple's iPhone 15 (released September 2023) replaced Lightning with USB-C, complying
with European Union regulations requiring USB-C on small electronic devices. Option A (USB-C on both ends) would be
used for newer iPhones (15 and later) or for connecting USB-C devices. Option C (Micro-USB) is the older standard used on
many Android devices and accessories; it is being phased out in favor of USB-C. Option D (Mini-USB) is an even older
connector used on some cameras and older devices. The Lightning connector is reversible like USB-C, but they are not
interchangeable.
Page 4
