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WorksheetsPractice Test 3 CompTIA A+ (Core 1)
Total questions: 140
Worksheet time: 1hrs 10mins
A laptop display is visible only at extreme angles and colors look washed out. Which panel type is it most likely not using?
TN
IPS
VA
TFT with poor backlight
A modern laptop with USB-C Power Delivery can accept up to 65 W for charging. What else can that same cable carry simultaneously if supported?
Only DC power
Power + DisplayPort video + USB data
Power + analog VGA
Power + PS/2
A user wants to connect a phone to a car stereo for hands-free calls and audio streaming. Which profile set is required?
A2DP + HFP
PAN + HID
IRDA + OBEX
802.11ac + WEP
An iPad needs to mirror its screen to an Apple TV over the same LAN. Which two technologies partner under the hood?
NFC + WPA
Bluetooth + AirDrop
mDNS/Bonjour + AirPlay
L2TP + IPsec
A laptop with a smart card reader is used for two-factor login. What does the card primarily store?
SIM profiles
Cryptographic certificates/keys
iCloud credentials
BIOS passwords
A user complains their Android phone’s photos no longer sync to the cloud on cellular, only on Wi‑Fi. Which setting likely changed?
VPN split tunneling
Battery saver
Upload on Wi‑Fi only
NFC payments
A stylus supports tilt and 4096 levels. What display hardware must the device include?
Resistive touch grid
Active digitizer layer
Infrared touch frame
Only capacitive glass
A laptop has one M.2 slot that supports SATA or NVMe. Which keying will most likely be present?
B key only
M key only
B+M key
A key
Which mobile connection allows a laptop to share a phone’s internet using a USB cable?
Wi‑Fi hotspot
Bluetooth PAN
USB tethering
NFC pairing
A smartphone supports eSIM + physical SIM. What practical use does this enable?
SIMless operation only
Two active carriers/profiles for travel and work
Faster Wi‑Fi roaming
More internal storage
A user reports “Storage almost full” on iOS. Which action frees the most space with least data loss?
Erase all content
Enable “Offload Unused Apps”
Disable iCloud
Turn on Airplane Mode
On a thin ultraportable, the RAM is LPDDR5 and soldered. What upgrade path exists?
Replace SO‑DIMMs
Add a second SO‑DIMM
None—capacity is fixed
Upgrade in BIOS
Which wireless standard adds the 6 GHz band in supported regions?
802.11ac (Wi‑Fi 5)
802.11ax (Wi‑Fi 6E)
802.11n (Wi‑Fi 4)
802.11g
What feature allows contactless payments at a retail terminal?
QR codes only
NFC secure element/tokenization
Bluetooth BR/EDR only
Wi‑Fi Direct
A laptop shows “No boot device found” after a repair. External USB boots fine. What laptop‑specific step might have been missed?
Enable AirDrop
Re‑seat or re‑enable the internal drive in BIOS/UEFI
Lower screen brightness
Disable Wi‑Fi
When a 2‑in‑1 is folded into tablet mode, which OS behavior is expected?
Keyboard/trackpad disabled automatically
Brightness locked at 100%
CPU underclocked permanently
Wi‑Fi disabled
A phone repeatedly disconnects from a car’s infotainment system using Android Auto (wired). What is the most likely culprit?
Weak cellular coverage
Low‑quality/charge‑only USB cable
Mismatched Bluetooth code page
Outdated GNSS almanac
A user wants to quickly share large video files phone→phone without internet. Best option?
Email attachments
Wi‑Fi Direct/AirDrop nearby sharing
SMS/MMS
POP3
Which device operates at Layer 2 and builds a MAC address table?
Router
Switch
Hub
Firewall
A network has VLAN 10 for users and VLAN 20 for VoIP. What allows both across a single uplink?
RSTP
802.1Q trunk
LACP hashing
PoE+
Your ISP provides a /29. How many usable IPv4 addresses do you get?
6
8
14
30
Which is a link‑local IPv6 address format?
fe80::/10
fc00::/7
2001:db8::/32
ff00::/8
Which DNS record type indicates the authoritative name server for a zone?
A
MX
NS
CNAME
A user can ping by IP on the internet but not by name. First best step?
Replace NIC
Check DNS server settings and try nslookup
Rebuild BCD
Clear printer spooler
What is a characteristic symptom of a DHCP scope at capacity?
Clients get 169.254.x.x
Duplicate MAC addresses
Switch port err‑disable
High CPU on the DHCP server only
Which Wi‑Fi security method should not be used in 2025 if avoidable?
WPA2‑AES
WPA3‑Personal
Open with captive portal for guest
WEP
Which physical cable type is best for long single-mode fiber runs?
RG-6
Cat 6a
OS2 with LC connectors
Multimode OM3 with ST
You need to copy files between two PCs on different subnets securely. Which protocol is best?
FTP
TFTP
SFTP
Telnet
A SOHO router’s DMZ feature is enabled for a game console. What does this do?
Blocks all inbound traffic
Forwards unsolicited inbound traffic to that host
Creates a site-to-site VPN
Enables QoS by default
Which 2.4 GHz channel plan minimizes overlap (20 MHz)?
1, 6, 11
2, 5, 8
3, 6, 9
4, 7, 10
Which port is default for POP3S (encrypted POP3)?
110
995
143
993
A cable internet installation terminates at the customer premise with what connector to the modem?
RJ-11
F-type coax
LC duplex
BNC T
Which feature allows power to access points over Ethernet cables?
QoS
PoE/PoE+
PortFast
TACACS+
A user on Wi-Fi complains of slow performance during lunch when many people are present. What common factor explains this?
Increased SNR
Higher contention and airtime utilization
Lower interference
Higher transmit power
What tool is best for verifying pair order and split pairs in a copper cable?
OTDR
Cable certifier/advanced cable tester
Tone and probe
Multimeter only
Which record points a subdomain to a different canonical name?
MX
CNAME
TXT
SRV
Which motherboard form factor is smallest?
ATX
microATX
Mini-ITX
E-ATX
A PSU lists 80 PLUS Gold. What does that indicate?
Peak wattage
Efficiency level across load ranges
GPU compatibility
Number of rails
Which connector provides additional GPU power?
4-pin Molex
6/8-pin PCIe power
8-pin EPS12V (CPU)
24-pin ATX main
Which storage has lowest latency for random I/O?
HDD 7200 RPM
SATA SSD
NVMe (PCIe) SSD
USB flash drive
A user needs fault tolerance with two drives and the simplest configuration. Choose:
RAID 0
RAID 1
RAID 5
RAID 10
In a laser printer, what does the transfer step do?
Heats toner
Places charge on drum
Moves toner from drum to paper
Cleans residual toner
Which port provides digital video + audio and supports ARC/eARC on TVs?
VGA
DVI-D
HDMI
DisplayPort mini
A thermal printer produces very light output. First action?
Replace toner
Use correct thermal paper and clean the print head
Replace the drum
Calibrate color profiles
Which M.2 code indicates PCIe x4 (NVMe) support on the device?
B key
M key
E key
A key
A new build won’t power on. You notice the 24-pin ATX isn’t fully seated. What symptom matches?
Fans spin but no video
No power at all
Hard drive clicks only
Beeps continuously
Which expansion slot is used by a high-end capture card requiring moderate bandwidth?
PCIe x1 or x4
ISA
AGP
AMR
Which cable type is code-compliant for air-handling spaces?
PVC jacket (CM)
Riser (CMR)
Plenum-rated (CMP)
Outdoor gel-filled
A user asks for a workstation tuned for CAD with 3D rendering. Best upgrade priority?
High-end gaming audio
ECC RAM only
Multi-core CPU + workstation GPU + lots of RAM
Extra SATA ports
Which connector is used by SATA power?
7-pin L-shaped
15-pin flat
6-pin PCIe
8-pin EPS
A photo printer needs borderless prints with high color accuracy. Which technology fits best?
Dot-matrix impact
Dye-sublimation or photo-grade inkjet
Thermal receipt
Line printer
Which battery chemistry is standard in modern laptops?
NiCd
NiMH
Li-ion
Lead-acid
A user adds a second identical RAM module but dual-channel doesn’t engage. What’s the likely oversight?
Mixed DDR generations
Slots not matched as per motherboard color coding
ECC vs non-ECC mix
RAM voltage too low
Which device enables one keyboard, one mouse, and one monitor to control multiple PCs?
NAS
KVM switch
Docking station
Patch panel
A Type 1 hypervisor runs:
On bare metal
Inside a VM
As an app in Windows only
Only on ARM
Which VM networking mode shares the host’s IP but provides NAT to the guest?
Host-only
NAT
Bridged
Promiscuous
Which cloud model delivers complete apps (email, CRM) to end users?
IaaS
PaaS
SaaS
FaaS
Which cloud characteristic refers to on-demand self-service?
Capacity planning
Users provision resources without human interaction
Single-tenant hardware
Tape rotation
Spinning up many VMs without lifecycle control or ownership tracking is:
Cloud bursting
VM sprawl
Blue/green deployment
DRaaS
What is the best safety net before patching a critical VM?
Export as CSV
Take a snapshot and verify free space
Increase vCPU
Power off for 24 hours
A cloud provider charges per GB and per hour of VM runtime. This is:
Rapid elasticity
Resource pooling
Measured service
Multitenancy
In IaaS, which responsibility lies with the customer?
Physical host patching
Hypervisor upgrades
Guest OS hardening and application patches
Data center power
Containers differ from VMs in that containers:
Include a full guest OS
Share the host kernel and package only what’s needed
Require VT-x disabled
Replace all security controls
Which storage feature allows instant clones and “thin” space use?
Copy-on-write snapshots
Tape libraries
Optical jukebox
JBOD only
A company uses on-prem for databases and public cloud for web front ends with VPN between. What model is this?
Community cloud
Hybrid cloud
Private cloud only
Multi-tenant private
Which VM resource usually becomes the bottleneck first on a small lab host?
RAM
Optical drive
Keyboard
Serial ports
A developer needs managed runtime + database without server admin. Choose:
IaaS
PaaS
SaaS
Colo
You need to run nested VMs. What host support is required?
CPU virtualization extensions enabled (VT-x/AMD-V) and nested virt support
Disable virtualization in BIOS
GPU passthrough only
Extra NICs
During a regional outage, your cloud app fails over automatically to a second region. What concept is this?
Elastic IP
Multi-region redundancy
DHCP relay
VLAN pooling
Which option most reduces cloud cost for non-critical batch jobs?
Always-on large instances
Spot/preemptible instances with checkpoints
Dedicated hosts
Overprovision for headroom
Which VM disk type expands as data is written instead of using the full size up front?
Thick eager zeroed
Thick lazy zeroed
Thin-provisioned
Raw LUN
A desktop powers on with fans, but there are continuous memory beeps. First step?
Reinstall Windows
Reseat RAM and try one stick in the recommended slot
Replace PSU
Update GPU driver
After a move, a PC shows no link lights on Ethernet. Which is the first check?
Swap to a known-good cable/port
Clear DNS cache
Rebuild TCP stack
Replace the motherboard
Laptop shuts down suddenly when the power adapter is nudged; battery icon shows “Not charging.” Most likely?
Display driver issue
Damaged DC-in jack or adapter cable
DNS problem
Keyboard failure
A user reports vertical streaks on laser prints in the same positions on each page. Likely cause?
Dirty transfer corona or damaged drum
Wrong paper size
Empty waste toner bottle on inkjet
Low fuser temperature on inkjet
A PC reboots under GPU load. Temperatures are normal. What else should you check next?
DHCP lease time
PCIe power connectors and PSU wattage/rails
Wi-Fi channel width
Printer driver
A workstation shows CPU temps of 98°C at idle. Which step is most effective?
Lower screen resolution
Reseat cooler, reapply thermal paste, and verify fan operation
Change to DHCP
Reinstall GPU drivers
A user cannot access a share by name but can by IP. Ping to hostname returns a different IP than expected. What’s the fix?
Replace switch
Correct DNS entry/flush cache
Disable IPv6
Increase MTU
A new Cat 6 run fails certification due to split pairs. Where is the error most likely?
Patch panel labeling
One or both RJ-45 terminations
Switch port speed
DHCP scope
Users on one floor get 169.254.x.x addresses. The switch and gateway are up. Next check?
DHCP relay (IP helper) on that VLAN
DNS TXT records
VLAN MTU
Printer SNMP
A monitor displays “Out of range” after setting 4K@120 Hz on an older HDMI link. Quick recovery?
Replace CPU
Boot to Safe Mode/low-res and set a supported resolution/refresh
Rebuild BCD
Clear CMOS battery
A laptop keyboard misses certain keys after a small spill. Trackpad works. What’s the likely remedy?
Replace the keyboard assembly
Reinstall chipset drivers
Replace the HDD
Update firmware for the NIC
Users complain Wi-Fi drops near the break room microwave. Best mitigation?
Increase 2.4 GHz channel width
Move clients/APs to 5/6 GHz bands
Enable WEP
Lower AP transmit power
A printer is pingable but shows Offline in Windows. What first action commonly resolves it?
Delete and reinstall Windows
Restart the Print Spooler and verify the TCP/IP port points to the correct IP
Replace toner
Change VLANs
A PC posts but shows no boot device after adding a second SSD. Which setting likely changed?
DHCP options
Boot order/drive priority in UEFI
Wi-Fi country code
Keyboard layout
A patch panel port is unlabeled. You need to find the matching wall jack. Which tool set?
Loopback plug only
Tone generator and probe
OTDR for copper
Optical power meter
A fiber link shows high attenuation after a rack move. What’s the most common cause?
DNSSEC
Dirty connectors or tight bend radius
Duplex mismatch
DHCP starvation
A PoE AP won’t power from one switch port but works on another. What’s the likely issue?
DNS failure
PoE disabled or non-PoE port
VLAN mismatch
Wrong SSID
After a brief outage, domain logons fail with time skew errors. Quick fix?
Disable DNS
Restore NTP/time service and resync clocks
Change to static IPs
Update GPU firmware
A laptop display is visible only at extreme angles and colors look washed out. Which panel type is it most likely not using?
IPS
TN
VA
OLED
A modern laptop with USB-C Power Delivery can accept up to 65 W for charging. What else can that same cable carry simultaneously if supported?
Power only
Power + USB data
Power + DisplayPort video
Power + DisplayPort video + USB data
A user wants to connect a phone to a car stereo for hands-free calls and audio streaming. Which profile set is required?
A2DP + HFP
HSP only
AVRCP + A2DP
PAN
An iPad needs to mirror its screen to an Apple TV over the same LAN. Which two technologies partner under the hood?
Bluetooth + AirDrop
mDNS/Bonjour + AirPlay
SMB + AirPrint
Wi‑Fi Direct + Miracast
A laptop with a smart card reader is used for two-factor login. What does the card primarily store?
Contact list
Photos
Cryptographic certificates/keys
BIOS passwords
Android photos no longer sync on cellular, only on Wi‑Fi. Which setting likely changed?
Enable background sync
Upload on Wi‑Fi only
Cellular data unlimited
Roaming disabled
A stylus supports tilt and 4096 levels. What display hardware must the device include?
Capacitive touch only
Resistive touch
Active digitizer layer
OLED backlight
A laptop has one M.2 slot that supports SATA or NVMe. Which keying will most likely be present?
B key
M key
B+M key
A key
Which mobile connection allows a laptop to share a phone’s internet using a USB cable?
Bluetooth PAN
Wi‑Fi hotspot
USB tethering
NFC sharing
A smartphone supports eSIM + physical SIM. What practical use does this enable?
Use dual cameras
Two active carriers/profiles
Extra storage
Faster charging
iOS shows “Storage almost full.” Which action frees the most space with least data loss?
Delete Photos
Factory reset
Enable “Offload Unused Apps”
Disable iCloud
On a thin ultraportable, the RAM is LPDDR5 and soldered. What upgrade path exists?
Add SODIMM
Replace motherboard RAM module
None—capacity is fixed
Use external RAM
Which wireless standard adds the 6 GHz band?
802.11ac
802.11ax (Wi‑Fi 6E)
802.11n
802.11ad
What feature allows contactless payments at a retail terminal?
QR code scanning
NFC secure element/tokenization
Bluetooth pairing
EMV chip only
A laptop shows “No boot device found” after a repair. What step might have been missed?
Replace power supply
Re‑seat or re‑enable the internal drive in BIOS/UEFI
Clean the screen
Update antivirus
When a 2‑in‑1 is folded into tablet mode, which OS behavior is expected?
Increase fan speed
Keyboard/trackpad disabled automatically
Enable Safe Mode
Switch to guest account
Android Auto (wired) repeatedly disconnects. Most likely culprit?
Outdated car stereo
Low‑quality/charge‑only USB cable
Incorrect APN
Weak Wi‑Fi signal
Quickly share large video files phone→phone without internet. Best option?
MMS
Wi‑Fi Direct/AirDrop nearby sharing
Upload to social media
Email attachment
Which device operates at Layer 2 and builds a MAC address table?
Router
Switch
Hub
Firewall
VLAN 10 (users) and VLAN 20 (VoIP) across one uplink requires:
Access port
802.1Q trunk
Spanning tree disabled
Link aggregation only
Your ISP provides a /29. How many usable IPv4 addresses?
2
4
6
8
Which is a link‑local IPv6 address format?
2001:db8::/32
fe80::/10
fc00::/7
::1/128
Which DNS record indicates the authoritative name server for a zone?
A
MX
NS
TXT
Ping by IP works, by name fails. First best step?
Replace router
Check DNS server settings and try nslookup
Clear ARP cache
Change subnet mask
Characteristic symptom of a DHCP scope at capacity?
Clients get 10.0.0.x
Clients get 169.254.x.x
Clients get static IP
Clients get duplicate IP
Which Wi‑Fi security method should not be used in 2025 if avoidable?
WPA2‑PSK
WPA3‑SAE
WEP
WPA‑TKIP
Best for long single‑mode fiber runs?
OM3 with SC
OS2 with LC
OM1 with ST
RG6 coax
Secure copy between PCs on different subnets?
FTP
SMB
SFTP
TFTP
SOHO router DMZ feature enabled for a console does what?
Blocks all outbound traffic
Forwards unsolicited inbound traffic to that host
Enables QoS for games
Assigns static IP
2.4 GHz non‑overlapping channel plan (20 MHz)?
1, 6, 11
2, 7, 12
3, 8, 13
4, 9, 14
Default port for POP3S (encrypted POP3)?
110
143
993
995
Cable internet to the modem terminates with what connector?
RJ45
F‑type coax
BNC
LC
Which feature provides power to APs over Ethernet cables?
VLAN tagging
PoE/PoE+
QoS
LACP
Wi‑Fi slows at lunchtime when many users are present. Why?
AP rebooting
Higher contention and airtime utilization
Channel bonded too wide
DHCP leases expiring
Best tool for verifying pair order and split pairs in copper?
Tone generator
Cable certifier/advanced cable tester
Crimp tool
Optical power meter
Which record points a subdomain to a different canonical name?
A
CNAME
MX
PTR
Which motherboard form factor is smallest?
ATX
microATX
Mini‑ITX
E‑ATX
A PSU lists 80 PLUS Gold. What does that indicate?
Output wattage
Efficiency level across load ranges
Modular cabling
Single‑rail design
Which connector provides additional GPU power?
24‑pin ATX
4‑pin Molex
6/8‑pin PCIe power
SATA data
Which storage has lowest latency for random I/O?
7200‑RPM HDD
SATA SSD
NVMe (PCIe) SSD
USB flash drive
Fault tolerance with two drives, simplest configuration:
RAID 0
RAID 1
RAID 5
JBOD
In a laser printer, the transfer step does what?
Heats the fuser
Charges the drum
Moves toner from drum to paper
Cleans the waste bin
Which port provides digital video + audio and supports ARC/eARC on TVs?
VGA
DVI
HDMI
DisplayPort
A thermal printer produces very light output. First action?
Replace fuser
Use correct thermal paper and clean the print head
Update drivers
Increase DPI
Which M.2 code indicates PCIe x4 (NVMe) support on the device?
B key
M key
B+M key
A key
A new build won’t power on; the 24‑pin ATX isn’t fully seated. What symptom matches?
Random reboots
No power at all
No video but fans spin
BSOD only
Which expansion slot is used by a high‑end capture card requiring moderate bandwidth?
PCIe x1 or x4
PCI
AGP
M.2
Which cable type is code‑compliant for air‑handling spaces?
PVC jacket
Riser‑rated (CMR)
Plenum‑rated (CMP)
Armored fiber
Workstation tuned for CAD with 3D rendering—best upgrade priority?
Add Wi‑Fi card
Multi‑core CPU + workstation GPU + lots of RAM
Larger hard drive only
RGB lighting
Which connector is used by SATA power?
7‑pin
15‑pin flat
6‑pin PCIe
4‑pin Molex
Photo printer needs continuous-ton and lab-quality photos. Which tech fits best?
Thermal transfer label printer
Dye‑sublimation
Photo‑grade inkjet
Dot‑matrix
