CompTIA A+ core 1 (220-1101) : Topic Covered
- Hardware
- Networking technology
- Mobile devices
- Cloud computing
- Virtualization given topics.
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CompTIA A+ core 1 (220-1101) : Short Notes
Short Notes
Hardware
Key Concepts:
- RAM: Temporary storage used by the CPU for quick data access.
- SSD: Solid-State Drive, faster than HDD with no moving parts.
- Power Supply Unit (PSU): Converts AC power to DC for computer components.
Practice Question:
Q: What component is used to cool the CPU in most desktop computers?
A: Heat sink and fan.
Networking Technology
Key Concepts:
- Router: Directs data between different networks, such as between a home network and the internet.
- Switch: Connects devices within the same network and forwards data based on MAC addresses.
- 802.11 standards: Define Wi-Fi technology (e.g., 802.11ac for faster speeds).
Practice Question:
Q: Which device assigns IP addresses on a network?
A: DHCP server.
Mobile Devices
Key Concepts:
- NFC: Near Field Communication, used for contactless payments.
- Li-Ion Battery: Commonly used in mobile devices, known for longer battery life and recharge cycles.
- Airplane Mode: Disables wireless communications on mobile devices.
Practice Question:
Q: What type of charging port is most commonly found on modern Android devices?
A: USB-C.
Cloud Computing
Key Concepts:
- SaaS (Software as a Service): Cloud service where software is hosted and accessed via a web browser.
- IaaS (Infrastructure as a Service): Provides virtualized computing resources like storage and networking.
- Cloud Storage: Services like Google Drive or Dropbox, where data is stored online and accessible from anywhere.
Practice Question:
Q: Which cloud model provides ready-to-use applications to users over the internet?
A: SaaS.
Virtualization
Key Concepts:
- Hypervisor: Software that enables multiple virtual machines (VMs) to run on a single physical machine.
- VM (Virtual Machine): A software-based emulation of a physical computer.
- Host vs. Guest: The host is the physical machine, and the guest is the virtual machine running on it.
Practice Question:
Q: What type of virtualization allows a single physical server to run multiple operating systems?
A: Server virtualization.
CompTIA A+ core 1 (220-1101) : Questions with Answer
A technician needs to replace a failed power supply on a server. The server in question only has one power supply. The server contains two processors that each need 100w, five hard drives that each need 9w, and a GPU that uses 200w. Which of the following power supplies should the technician use?
A. 375wB. 425w
C. 325w
D. 500w
Answer
D. 500w
To determine the appropriate power supply for the server, we need to add up the power requirements of all the components:
Processors: 2 processors × 100W each = 200W
Hard Drives: 5 hard drives × 9W each = 45W
GPU: 1 GPU × 200W = 200W
Total power needed = 200W (processors) + 45W (hard drives) + 200W (GPU) = 445W1.
Given the options, the technician should use the 500W power supply (Option D) to ensure there is enough power to handle the server’s load and provide some headroom for stability and future upgrades.
An organization uses a cloud storage service to store company files. The file synchronization client for this cloud service is installed on every user's computer. One user reports that a file synced with the client to their computer does not contain information a co-worker of theirs added earlier today. Indicate the BEST action to take when troubleshooting this problem.
A. Exit the cloud service's client that is locally installed, restart the computer, and check to see if the file contains the information that is missing.B. Visit the cloud service's website, locate the service status page, and determine if there is a service outage impacting the organization.
C. Open the cloud service's client that is locally installed, determine if there are any reported errors, and follow the steps provided to correct the synchronization errors.
D. Open the cloud service's client that is locally installed and check to see if there are any updates available for the client.
Answer
C. Open the cloud service's client that is locally installed, determine if there are any reported errors, and follow the steps provided to correct the synchronization errors.
A technician is helping a user configure a new mobile phone. The user could pay for purchases with the previous phone by touching the phone to the payment system. Which of the following features should the technician enable so that the user can use the new phone to also pay for purchases this way?
A. PANB. RFID
C. NFC
D. Bluetooth
Answer
C. NFC
NFC (Near-Field Communication) is a short-range wireless technology that allows devices to communicate by touching or being placed close together. It's commonly used for contactless payments, data transfer, and access control.
A user recently reported that every few days the system clock is approximately three minutes behind. The user also received an error message on the BIOS screen. Which of the following would MOST likely fix the clock issue?
A. Enable dual-channel memory by adding a second RAM stick.B. Install a new power supply.
C. Replace the motherboard's CMOS battery.
D. Configure the PC to be an NTP server.
Answer
C. Replace the motherboard's CMOS battery.
The CMOS battery is a small, flat battery that powers the system's BIOS and keeps the system clock running accurately even when the computer is turned off. When the CMOS battery starts to fail, it can cause the system clock to lose accuracy. Replacing the CMOS battery is likely to resolve the issue.
Which tool should be used to test if a power supply is providing adequate voltage?
A) MultimeterB) Screwdriver
C) Power strip
D) Loopback plug
Answer
A) Multimeter
A multimeter can measure the voltage output from a power supply to ensure it is within the proper range.
A user with a new 5G smartphone notices the device has separated at the seam on one edge and is measurably thicker at that point. Which of the following actions should the user take FIRST?
A. Power off the smartphone and place it in a bucket of rice for 48 hours.B. Place the smartphone in a refrigerator between 35°F (1.6°C) and 40°F ( 4.4°C) overnight.
C. Fully deplete the phone's battery and then charge it to 100%.
D. Contact the smartphone manufacturer for warranty support.
Answer
D. Contact the smartphone manufacturer for warranty support.
Given that the device is new and has a physical defect, the first and most appropriate action would be to contact the manufacturer for warranty service. They can provide guidance on how to proceed, potentially offer a replacement device, or repair the existing one.
A technician is replacing a laptop's HDD with an SSD. Which of the following should the technician do FIRST?
A. Create a backup of the HDD.B. Upgrade the RAM on the laptop.
C. Enable SSD support at BIOS.
D. Install SSD drivers inside the OS.
Answer
A. Create a backup of the HDD.
A user’s laptop is not charging when plugged in. What is the most likely cause?
A) Damaged charging portB) Corrupted operating system
C) Low RAM
D) Disconnected hard drive
Answer
Damaged charging port
If a laptop isn't charging, a damaged or faulty charging port is a common cause, whereas the other options are unrelated to charging issues.
Which of the following technologies has the FASTEST connection speed?
A. FiberB. Satellite
C. DSL
D. Cable
Answer
A. Fiber
A PC in a conference room will be connected to a large-screen TV for video presentations during training sessions. Which of the following video connectors is the MOST likely choice for this environment?
A. Video Graphics ArrayB. Thunderbolt
C. Digital Visual Interface
D. High-Definition Multimedia Interface
Answer
D. High-Definition Multimedia Interface
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