CompTIA A+ Core 1 V15
CompTIA A+ Core 1 220-1201 Practice Test
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Questions updated at Jul 18, 2026, 1:30 PM CDT
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Question 1 of 10
Objective 4.1
Virtualization and cloud computing
A server administrator needs to optimize a virtualized environment. Which component enables multiple operating systems to run concurrently on a single physical server by abstracting hardware resources?
A hypervisor is the core component that enables virtualization. It creates and manages virtual machines, allowing multiple operating systems to share the same physical hardware resources. This is achieved by abstracting the hardware and presenting a virtualized environment to each guest operating system.
Concept tested:
Question 2 of 10
Objective 2.1
Networking
Which TCP mechanism primarily prevents a receiver from being overwhelmed by data by limiting the amount of data it can accept?
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Concept tested:
Question 3 of 10
Objective 5.5
Hardware and network troubleshooting
A user reports intermittent wireless drops and poor VoIP audio quality only in one conference room, particularly when a nearby microwave is in operation. What is the most likely cause?
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Question 4 of 10
Objective 4.2
Virtualization and cloud computing
A startup wants cloud-hosted virtual machines, storage, and networking while still managing the guest OS and applications. Which description best matches Infrastructure as a Service?
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Concept tested:
Question 5 of 10
Objective 2.2
Networking
A network administrator is setting up a new office. What is a key benefit of using DHCP to manage IP addresses?
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Question 6 of 10
Objective 5.2
Hardware and network troubleshooting
A workstation exhibits clicking noises, slow boot times, and disk error messages. After investigation, a technician determines a failing component is the root cause. Which hardware component is the most probable source of these symptoms?
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Question 7 of 10
Objective 3.3
Hardware
A user is choosing between a laser printer and an inkjet for office documents. Which statement correctly contrasts the two printer types?
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Question 8 of 10
Objective 1.4
Mobile devices
A traveler turns on Airplane Mode before a long flight and does not manually re-enable cellular service. What is true about cellular data?
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Question 9 of 10
Objective 3.2
Hardware
A technician is replacing a damaged SATA data cable and checks the connector before ordering parts. How many pins are in a standard SATA data connector?
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Question 10 of 10
Objective 1.2
Mobile devices
A tablet is charging from a laptop using a USB-C cable, but no data transfer is occurring. Based on USB Type-C terminology, what does 'Accessory Mode' describe?
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220-1201 A+ Core 1
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UpdatedJul 18, 2026, 1:30 PM CDT
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The free daily A+ Core 1 set includes crawlable question text, answer choices, correct answer labels, objective mapping, and source links. Only the first SEO card includes answer explanations and any extra learning features. Pro-only bank questions stay locked; this section mirrors only the 10 free daily questions already shown on this page.
Question 1 A server administrator needs to optimize a virtualized environment. Which component enables multiple operating systems to run concurrently on a single physical server by abstracting hardware resources?
Answer choices
- A. A network device that translates IP addresses to MAC addresses
- B. Software that manages the physical hardware and allows multiple operating systems to run on it simultaneously
- C. A virtual machine that runs on top of another virtual machine
- D. A system for monitoring and controlling server performance
Correct answer
Software that manages the physical hardware and allows multiple operating systems to run on it simultaneously
A hypervisor is the core component that enables virtualization. It creates and manages virtual machines, allowing multiple operating systems to share the same physical hardware resources. This is achieved by abstracting the hardware and presenting a virtualized environment to each guest operating system.
Wrong-answer review
- A. A network device that translates IP addresses to MAC addresses: A network device that translates IP addresses to MAC addresses is a network switch, not a virtualization component, whereas Software that manages the physical hardware and allows multiple operating systems to run on it simultaneously fits the requirement in this scenario.
- C. A virtual machine that runs on top of another virtual machine: A virtual machine is a guest operating system running *within* a hypervisor, not the component enabling multiple OSes, whereas Software that manages the physical hardware and allows multiple operating systems to run on it simultaneously fits the requirement in this scenario.
- D. A system for monitoring and controlling server performance: Server performance monitoring tools are used to observe and manage server resources, but they don't create virtual machines, whereas Software that manages the physical hardware and allows multiple operating systems to run on it simultaneously fits the requirement in this scenario.
Extra learning features
Interview question
Q: Our team is exploring ways to consolidate our server infrastructure to reduce costs and improve efficiency. We're considering virtualization. Explain how virtualization works at a high level, and what benefits it brings to the table. Strong answer: Virtualization allows us to run multiple operating systems and applications on a single physical server by using a hypervisor. The hypervisor abstracts the hardware resources – CPU, memory, storage – and allocates them to each virtual machine. This means we can get more out of our hardware, reducing the number of physical servers we need. It also improves flexibility, as we can quickly provision new virtual machines and move workloads around as needed. There's also a cost savings in terms of power, cooling, and space.
- Understanding of hypervisor functionality
- Ability to explain the benefits of virtualization (resource utilization, flexibility, cost savings)
- Awareness of the abstraction layer
- Understanding of the overall impact on infrastructure
Caution: Simply defining virtualization without explaining its benefits or how it works. Focusing solely on the technical aspects without mentioning business value.
Question 2 Which TCP mechanism primarily prevents a receiver from being overwhelmed by data by limiting the amount of data it can accept?
Answer choices
- A. By increasing packet size after each ACK
- B. By using a receive window to limit in-flight data
- C. By disabling acknowledgments during congestion
- D. By forcing all traffic through a relay server
Correct answer
By using a receive window to limit in-flight data
Question 3 A user reports intermittent wireless drops and poor VoIP audio quality only in one conference room, particularly when a nearby microwave is in operation. What is the most likely cause?
Answer choices
- A. A RAID controller failure
- B. External radio-frequency interference
- C. A swollen laptop battery
- D. A misaligned printer tray
Correct answer
External radio-frequency interference
Question 4 A startup wants cloud-hosted virtual machines, storage, and networking while still managing the guest OS and applications. Which description best matches Infrastructure as a Service?
Answer choices
- A. It provides virtualized compute, storage, and networking while the customer manages the guest OS and apps
- B. It provides only managed databases and serverless runtimes
- C. It removes all customer responsibility for system administration
- D. It delivers a finished application that the provider fully manages
Correct answer
It provides virtualized compute, storage, and networking while the customer manages the guest OS and apps
Question 5 A network administrator is setting up a new office. What is a key benefit of using DHCP to manage IP addresses?
Answer choices
- A. It allows for manual configuration of all devices on the network
- B. It increases the speed at which data packets are transmitted
- C. It simplifies IP address management and reduces the administrative burden
- D. It enhances network security by encrypting data
Correct answer
It simplifies IP address management and reduces the administrative burden
Question 6 A workstation exhibits clicking noises, slow boot times, and disk error messages. After investigation, a technician determines a failing component is the root cause. Which hardware component is the most probable source of these symptoms?
Answer choices
- A. An incorrect Wi-Fi password
- B. A failing hard drive
- C. A bad DIMM that needs reseating
- D. An empty printer tray
Correct answer
A failing hard drive
Question 7 A user is choosing between a laser printer and an inkjet for office documents. Which statement correctly contrasts the two printer types?
Answer choices
- A. Laser printers only print photos and cannot print text efficiently
- B. Laser printers spray liquid ink while inkjets melt powder toner
- C. Laser printers require no imaging components, unlike inkjets
- D. Laser printers use electrostatic toner transfer and heat fusing, while inkjets spray liquid ink droplets
Correct answer
Laser printers use electrostatic toner transfer and heat fusing, while inkjets spray liquid ink droplets
Question 8 A traveler turns on Airplane Mode before a long flight and does not manually re-enable cellular service. What is true about cellular data?
Answer choices
- A. Cellular data continues unchanged
- B. Only outgoing data is blocked
- C. Cellular data is disabled until cellular service is turned back on
- D. Cellular data is automatically prioritized for emergency calls
Correct answer
Cellular data is disabled until cellular service is turned back on
Question 9 A technician is replacing a damaged SATA data cable and checks the connector before ordering parts. How many pins are in a standard SATA data connector?
Answer choices
- A. 7
- B. 15
- C. 40
- D. 4
Correct answer
7
Question 10 A tablet is charging from a laptop using a USB-C cable, but no data transfer is occurring. Based on USB Type-C terminology, what does 'Accessory Mode' describe?
Answer choices
- A. A wireless fallback mode used when CC pins fail
- B. A mode that disables USB data signaling
- C. A connector reconfiguration based on specific CC pin terminations
- D. A mode that only supports legacy USB-A charging
Correct answer
A connector reconfiguration based on specific CC pin terminations
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