A user is having issues displaying the contents of their laptop screen on a projector. The laptop is connected using an HDMI cable, but the screen displays a message indicating there is no signal. Which of the following should the technician do first to diagnose the issue?
Answer(s): A
Ensuring the projector is set to the same HDMI input as the laptop is the quickest way to confirm it’s actually looking at the correct source before swapping cables or changing settings.
Which of the following best describes the purpose of a firewall?
Answer(s): D
A firewall filters incoming and outgoing network traffic based on defined security rules, preventing unauthorized or malicious data packets from passing through.
A customer's laptop has been randomly shutting down. The laptop charges intermittently, and the screen dims when the laptop is not charging. Which of the following is the most likely cause of the issue?
Answer(s): C
Intermittent charging and automatic dimming when unplugged indicate the battery isn’t holding or delivering power properly, causing shutdowns when AC power isn’t available.
Which of the following DNS record types is used to identify an email server?
An MX (Mail Exchanger) record in DNS specifies the mail server responsible for accepting email messages on behalf of a domain.
Which of the following is used to register inputs on a touch-screen monitor?
Answer(s): B
The digitizer is the touch-sensitive layer over the display that detects and converts finger or stylus contact into input coordinates for the system.
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