- (Topic 3)
A user's track pad has stopped working. Which of the following should the user do to resolve the track pad's functionality?
Correct Answer:
B
The correct answer is B. Use the Function key.
The explanation is that some laptops have a Function key (Fn) that can be used to toggle the track pad on or off. This can be useful if the user wants to use an external mouse instead of the track pad, or if the track pad is accidentally activated by palm movements. The user should look for a Fn key on their keyboard and a track pad icon on one of the other keys, such as F5 or F9, and press them together to enable or disable the track pad.
- (Topic 4)
A technician assembled a new PC. After a few minutes, the computer slows down and then shuts itself off. Which of the following is the most likely cause of the failure?
Correct Answer:
A
The most likely cause of the failure is A. Thermal paste was not used.
Thermal paste, also known as thermal grease or thermal compound, is a substance that is applied between the CPU and the heat sink to improve the heat transfer and cooling of the CPU. Thermal paste fills the gaps and irregularities between the CPU and the heat sink, creating a better contact and reducing the thermal resistance .
According to some web search results , some signs and symptoms of not using thermal paste or using it incorrectly are:
•The CPU overheats and slows down or shuts down to prevent damage
•The CPU fan spins faster and louder to try to cool down the CPU
•The PC performance drops or becomes unstable
•The PC crashes or displays errors or blue screens
To fix this issue, the technician should apply thermal paste properly between the CPU and the heat sink, following these steps :
•Turn off the PC and unplug it from the power source
•Open the PC case and locate the CPU fan and heat sink
•Remove the CPU fan and heat sink from the motherboard
•Clean the surfaces of the CPU and heat sink with a lint-free cloth and alcohol
•Apply a small amount of thermal paste (about the size of a grain of rice) in the center of the CPU
•Reattach the heat sink and CPU fan to the motherboard, making sure they are aligned and secured
•Close the PC case and plug it back to the power source
The GPU needs additional power, the memory is insufficient, or the motherboard is
incompatible are not likely causes of the failure, since they would not cause the PC to overheat and shut down after a few minutes. The GPU needs additional power if it has a high power consumption that exceeds the capacity of the power supply or the PCIe slot. The memory is insufficient if it cannot handle the applications or tasks that are running on the PC. The motherboard is incompatible if it does not support the CPU, RAM, or other components that are installed on it. These issues may cause poor performance, errors, or crashes, but not overheating and shutting down.
- (Topic 1)
Upon booting a workstation, a technician hears a distinct clicking sound after power is applied to the motherboard. Which of the following would MOST likely be the cause?
Correct Answer:
D
The clicking sound is the sound of a damaged disk in the HDD
A clicking sound from a hard disk drive typically indicates a mechanical failure, such as the read/write head hitting a physical obstruction or a problem with the disk motor. This can cause the drive to fail to initialize or not be recognized by the system during booting.
- (Topic 4)
Which of the following protocols is the most appropriate to use for inventory tracking in a small warehouse?
Correct Answer:
B
Radio-frequency identification (RFID) is the most appropriate protocol to use for inventory tracking in a small warehouse. RFID is a technology that uses radio waves to identify and track objects that have RFID tags attached to them. RFID tags are small devices that store information about the object, such as its name, serial number, location, or status. RFID tags can be passive, which means they do not have a battery and rely on the radio signal from the reader to power them, or active, which means they have a battery and can transmit their own signal. RFID readers are devices that can scan the RFID tags and read the information stored on them.
RFID is suitable for inventory tracking in a small warehouse because it can provide several benefits, such as:
✑ Faster and more accurate scanning: RFID tags can be scanned without direct line
of sight, unlike barcodes, and can be scanned in bulk, unlike QR codes. This means that RFID readers can scan multiple items at once, even if they are inside boxes or containers, and reduce the time and errors involved in manual scanning.
✑ Real-time visibility and control: RFID tags can be updated with the latest
information about the inventory, such as its location, quantity, or condition. This means that RFID readers can provide real-time data and feedback on the inventory status, such as its availability, movement, or expiration. This can help improve inventory management, optimize warehouse space, and prevent stockouts or overstocking.
✑ Enhanced security and quality: RFID tags can be encrypted and authenticated,
unlike barcodes or QR codes, which can be easily copied or tampered with. This means that RFID tags can prevent unauthorized access or theft of the inventory, and ensure its authenticity and quality. This can help protect the inventory from damage, loss, or fraud, and increase customer satisfaction and trust.
References:
✑ Inventory Tracking Simplified: Steps, Methods and Efficiency Tips1
✑ 17 Essential Inventory Management Techniques – Forbes Advisor2
✑ Inventory Tracking vs Inventory Traceability - Kardex3
- (Topic 4)
Which of the following describes the difference between a DNS server and a DHCP server?
Correct Answer:
A
DNS stands for Domain Name System, and it is a network service that translates human-readable names (such as www.google.com) into numerical IP addresses (such as 172.217.14.206) that identify the location of the web servers on the internet. DNS also allows reverse lookup, which means finding the domain name associated with a given IP address. DNS servers are responsible for maintaining a database of domain names and their corresponding IP addresses, and responding to queries from clients who want to resolve a name to an address or vice versa12.
DHCP stands for Dynamic Host Configuration Protocol, and it is a network service that automatically assigns IP addresses and other network configuration parameters (such as subnet mask, default gateway, DNS server, etc.) to devices that join a network. DHCP servers are responsible for managing a pool of IP addresses and leasing them to clients for a specified duration. DHCP servers also renew or release the IP addresses when the lease expires or the client disconnects from the network34.
The difference between DNS and DHCP is that DNS is used for address translation, which means converting domain names to IP addresses and vice versa, while DHCP is used for IP address assignment, which means providing IP addresses and other network settings to devices that need to communicate on a network.
References:
✑ DNS Configuration – CompTIA A+ 220-1101 – 2.6
✑ DHCP Configuration - CompTIA A+ 220-1101 - 2.6 - Professor Messer IT Certification Training Courses
✑ CompTIA A+ 220-1101 – 2.6 - Professor Messer IT Certification …
✑ Courses for CompTIA A+: 220-1101: CompTIA A+ (Core 1) - Skillsoft
