COMPTIA A+ Practice Exam

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Ace your COMPTIA A+ certification with our practice exam. Engage with a variety of questions including multiple choice and performance-based, complete with hints and detailed explanations. Prepare effectively and boost your confidence for the big day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What kind of interference does EMI describe?

Between electrical appliances
Between signals in close proximity
Between software programs
Between incompatible connectors

The correct answer is: Between signals in close proximity

EMI stands for electromagnetic interference and it describes the interference between electromagnetic signals in close proximity. Options A, C, and D are incorrect because they describe types of interference that are not related to electromagnetic signals. Additionally, option A specifically mentions interference between electrical appliances, while EMI covers a broader range of electronic devices and signals. Option C is incorrect because EMI deals with physical signals, not software programs. Option D is incorrect because it refers to physical connectors, while EMI deals with electromagnetic signals.