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Free A+ Core 1 practice test
Know why every answer is right or wrong.
What 220-1101 covers: Mobile devices (34%) • Hardware (26%) • Networking (25%)
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A+ Core 1
A+ Core 1 (220-1101)
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In a virtualized environment, which statement best describes the role of a hypervisor?
A. Incorrect: It incorrectly states that a hypervisor runs on top of physical hardware rather than directly managing virtual machines.
B. Incorrect: It describes network functionality instead of the software layer role in virtualization.
C. Correct: It accurately defines a hypervisor as software enabling multiple operating systems to run simultaneously on one machine.
D. Incorrect: It mistakenly identifies a storage device function rather than the software management aspect.
In a network scenario where two devices need to exchange data reliably, which statement best describes TCP's role?
A. Incorrect: It describes a feature of TCP but does not capture its primary role in ensuring reliable data delivery.
B. Incorrect: Routing packets between different networks is the responsibility of IP and other network layer protocols, not TCP.
C. Correct: It accurately states that TCP ensures data integrity and order during transmission, which is essential for reliable communication.
D. Incorrect: TCP provides a connection-oriented service rather than a connectionless one.
What charging condition should be avoided with a consumer lithium-ion battery?
A. Correct: Charging below 0°C can cause lithium plating and damage the cell.
B. Incorrect: It does not harm a lithium-ion battery; it's actually better for the battery’s health to charge frequently but incompletely.
C. Incorrect: It is recommended to prolong its lifespan and prevent over-discharge, which can damage the battery.
D. Incorrect: Prevents overcharging, which can degrade the battery's capacity.
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What is a key feature of DDR5 RAM that distinguishes it from previous generations?
A. Correct: It supports higher memory capacities with the same pin count, a key feature of DDR5 RAM.
B. Incorrect: Although DDR5 has some form factor changes, supporting higher capacity within the same pin count is its primary distinguishing feature.
C. Incorrect: It is DDR5, but it does have lower voltage requirements compared to previous generations, this is not the main differentiating characteristic highlighted in the question.
D. Incorrect: Reduced power consumption is a benefit of DDR5 but it is not the key feature that distinguishes it from earlier versions.
In a scenario where a company needs to quickly provision multiple virtual machines for development purposes, which statement best describes IaaS?
A. Correct: It accurately describes IaaS by enabling users to provision, configure, and scale virtual machines on demand through a web-based interface.
B. Incorrect: It refers to SaaS (Software as a Service) rather than IaaS, which provides pre-configured software solutions ready for use without customization.
C. Incorrect: While it mentions infrastructure management, it incorrectly states that users must manage the operating systems and applications themselves, which goes against the core benefit of IaaS where these tasks are handled by the service provider.
D. Incorrect: It describes a physical server offering, not virtual machine services. IaaS focuses on providing access to virtual resources over the internet.
A network administrator is faced with a situation where a device's connection to the network is unstable. Upon closer inspection, they realize that the RJ45 connector needs crimping. What primary benefit does proper RJ45 crimping offer?
A. Incorrect: It increases physical size, which does not affect signal quality or stability.
B. Correct: It improves signal quality and reduces interference by ensuring a secure connection between the cable and connector.
C. Incorrect: Proper crimping has no impact on the cost of network equipment; it affects performance rather than financial aspects.
D. Incorrect: It is better connections, but it can improve stability, they do not inherently increase data transfer rates.
What is the primary function of USB-C accessory mode in mobile devices?
A. Correct: It enables mobile devices to charge and transfer data simultaneously through USB-C ports.
B. Incorrect: It does not accurately describe the specific functionality of USB-C accessory mode, which focuses on power delivery alongside data transfer.
C. Incorrect: It only addresses audio output, a limited function that does not encompass the broader capabilities of USB-C accessory mode.
D. Incorrect: Increasing power output capacity alone does not capture the dual purpose of charging and data transfer supported by USB-C accessory mode.
Which statement best describes a laser printer?
A. Incorrect: It describes inkjet printers, which use ink cartridges.
B. Incorrect: It explains how inkjet printers work by spraying ink through nozzles.
C. Incorrect: Thermal transfer technology uses heat to melt wax onto paper, not a laser beam.
D. Correct: It accurately describes the process of laser printing using a laser beam to create printed output.
What is the main advantage of using a hypervisor?
A. Incorrect: It increases storage capacity, which is unrelated to a hypervisor's primary function of managing virtual machines.
B. Correct: It allows multiple operating systems to run on a single piece of hardware simultaneously, showcasing the core benefit of virtualization.
C. Incorrect: Improving network performance between VMs is not the main advantage of using a hypervisor; that would be more related to networking configurations or software within the VMs.
D. Incorrect: Providing additional security features for VMs is important but secondary compared to running multiple OSes on one piece of hardware.
Which DHCP task gives a client the network settings it needs to communicate on the local network?
A. Correct: DHCP manages and assigns IP addresses to devices on a network.
B. Incorrect: It handles DNS resolution for domain names, which is the responsibility of DNS servers, not DHCP.
C. Incorrect: It secures network communications by encrypting data, but DHCP does not handle encryption or security measures; that falls under other protocols like TLS or IPSec.
D. Incorrect: It controls access to network resources, a function typically managed by authentication and authorization systems rather than DHCP.
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117 verified questions are currently in the live bank. Questions updated at May 13, 2026, 3:43 PM CDT. The daily set rotates at 10:00 AM local time, and each explanation links back to the source used to write it. Use the web set for quick practice, then switch to the app when available for larger banks and deeper review.
A+ Core 1 is tied to entry-level support work where hardware, devices, troubleshooting, and basic networking still show up every day.
- Role examples: help desk technician, desktop support specialist, field service technician, and junior IT support.
- Where it shows up: endpoint support, device troubleshooting, user support, and entry-level IT operations.
- On-the-job payoff: you need stronger fundamentals around devices, peripherals, mobile, cloud basics, and common support scenarios.
- Typical next step: It usually pairs with A+ Core 2 when the path is full A+ certification or broader service desk readiness.
A+ Core 1 usually rewards broad operational judgment across the whole exam lane, not just isolated fact recall.
- Current emphasis in this bank: Mobile devices (34%).
- Many CompTIA misses happen when two answers are both partly true but only one matches the right role, process order, or troubleshooting scope.
- Best official starting point: CompTIA A+.
The fastest path is to turn this exam into a repeatable pattern-recognition loop instead of a one-time cram session.
- Start with the free daily set closed-book so you can see which parts of the cloud and it lane still feel weak.
- Use every explanation as a checkpoint for why the right answer fits the scenario and why the other answer choices do not.
- Open the official CompTIA source when a concept keeps missing so you fix the gap at the source instead of rereading generic notes.
- Use the nearby cert pages when you need broader context around the same job path or technology stack.
The usual misses happen when learners recognize keywords but do not slow down enough to match the scenario to the exact decision the exam is testing.
- Reading for one familiar keyword and skipping the deeper clue that tells you which cloud and it concept actually fits.
- Memorizing isolated terms without checking why the right answer wins over the other answer choices in the same scenario.
- Ignoring the official CompTIA source after a miss and hoping the next question will feel easier on its own.
- Studying this page in isolation when one nearby cert page could clear up the broader pattern much faster.
The fastest path is simple: answer the set, review the reasoning, then use the score history and source links to decide what to hit next.
- Answer the free set first without looking anything up so the score reflects what is actually sticking.
- Read every explanation, especially the wrong answer choices, so the weaker options stop looking plausible next time.
- Open the linked source when a concept feels weak, then come back and repeat the question flow while the wording is fresh.
- Use the 7-day score keeper, related cert links, and comparison pages to decide what to study next instead of guessing.
- Move into the app when you want the full bank, timed reps, readiness tracking, and a steadier mobile study loop.
Use these official CompTIA resources alongside the daily practice set. They cover the provider's own exam page, study guide, or prep material.
Need adjacent CompTIA practice pages too? CompTIA practice hub.
How are A+ Core 1 questions generated?
dotCreds builds A+ Core 1 practice questions from CompTIA documentation, standards, and source-backed references, with official or primary sources preferred first. The questions are written for realistic study practice, not copied from exam dumps.
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Each question includes a source-backed explanation and a link to the documentation or reference used to validate the answer. If an official page is too broad, dotCreds uses a reputable answer-level reference instead of pretending a generic page proves the answer.
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The page tracks today's answered count and accuracy for the 10-question daily set, then saves a 7-day score history on this device so you can see your recent practice trend.
Why use this site?
The site is the fastest way to start A+ Core 1 practice without installing anything. It is built for daily recall, quick weak-topic discovery, and source-backed explanations you can review immediately.
Why use the app when available?
The web page is the quick free sampler. If a dotCreds app is available for A+ Core 1, the app is better for larger banks, focused weak-domain drills, longer review sessions, and mobile study routines.