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CompTIA A+ Certification Exam: Core 1 Sample Questions (Q120-Q125):

NEW QUESTION # 120
Which of the following describes the function of an injector?

A. To provide only data connectivity
B. To extend a network connection
C. To improve wireless performance
D. To supply power across a cable

Answer: D

Explanation:
A PoE injector is used to add power to an Ethernet cable, enabling the cable to deliver both power and data.
This is crucial when connecting to PoE-enabled devices like IP cameras or wireless access points that are far from power outlets.
Reference: "CompTIA A+ Complete Practice Tests" by Jeff T. Parker - Chapter 10, Question 77, page 585.

NEW QUESTION # 121
A technician is experimenting with network configurations and has connected two laptops to an unmanaged switch. The technician configured one of the laptops with a static IP address of 192.168.1.1 and the other with a static IP address of 192.168.2.2. The laptops are not communicating with each other. Which of the following is the most likely explanation for this issue?

A. The wireless NICs are malfunctioning.
B. The technician needs to use a hub instead of a switch.
C. The laptops do not have access to a router.
D. PoE interferes with intersubnet communication.

Answer: C

NEW QUESTION # 122
Which of the following display characteristics would be most important to ensure screen images appear the same as printed output?

A. Color gamut
B. Resolution
C. Refresh rate
D. Pixel density

Answer: A

Explanation:
Color gamut refers to the range of colors a display can accurately reproduce. For tasks like graphic design or photo editing, ensuring the screen's colors match the printed output is critical. Monitors with wide and accurate color gamuts (e.g., Adobe RGB) are preferred for these applications.
Option B (Pixel density): Incorrect. Pixel density affects image sharpness, not color accuracy.
Option C (Refresh rate): Incorrect. Refresh rate impacts motion smoothness but is unrelated to color matching.
Option D (Resolution): Incorrect. Resolution determines clarity and detail but does not influence color accuracy.
References:
CompTIA A+ Core 1 Objectives: 1.2 (Display types and characteristics)

NEW QUESTION # 123
A technician needs to prepare a conference room for a meeting. The technician connects the laptop to the LCD projector and audio system, and then verifies the connectivity of each device. The meeting begins, but the visual presentation suddenly cuts off 30 minutes later. The audio continues to play without interruption.
The technician brings in a backup laptop and connects it to the projector. The meeting continues without issue for 15 minutes until the presentation suddenly cuts off again. Which of the following should the technician do to resolve this issue?

A. Inspect the cables for damage
B. Examine the display for burn-in
C. Clean or replace the filter
D. Verify the input source
E. Check the laptop's audio output

Answer: C

Explanation:
Overheating is a common cause of projectors shutting down after extended use. A clogged air filter can cause overheating, resulting in intermittent shutdowns.
From CompTIA A+ 220-1101 Official Study Guide, Objective 4.1 - Troubleshooting displays:
"If a projector shuts down after running for a period, clean or replace the filter to prevent overheating and automatic shutdown." Verified Source:
* CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 4: Display Troubleshooting
* CompTIA Exam Objectives 220-1101, Domain 4.1

NEW QUESTION # 124
A technician is diagnosing several device issues reported by employees.
INSTRUCTIONS
Click on each device to review the issue. Then select the appropriate issue and solution from the drop-down menu. Each option may be used more than once.

Answer:

Explanation:

Explanation:
A screenshot of a computer AI-generated content may be incorrect.

NEW QUESTION # 125
......

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