CompTIA exam Determining the correct answer

CompTIA questions are not always the “one and only correct answer in the universe”. Because the questions are more subtle than that, they mostly require the “Best Answer” to be picked. The “Best Answer” is arrived to in part by looking at the context of the question and in part by deduction. The context of the question can include the scenario presented in the question text or the available distractors or both. In any case, what you believe is a wrong answer can still be a “best answer” given the alternatives. In an MCSA question each response you can disregard increases your chances of being correct by 25%! It is completely reasonable to arrive at the correct response by deductive reasoning.

Here is a good example. The question is:

“On the backside of a notebook, you generally see two connectors, one electrical for power and one non-electrical for security. Which of the choices best describes these two connections?“ and the available responses are:

NIC

HDMI

Cable lock

USB port

12vDC jack

Here is how you apply deductive reasoning to determine the two correct answers:

First, we need to know what will satisfy the question. Here there are two ports on the device one is for power. Check the answers and the only one relative to power is 12v DC jack. Now you have one of your two answers since none of the others reference power at all. You’ll see other voltages in the field but remember that the world you are in right here only has one listing a power rating and so it is your “BEST” choice. Now to Security, we want to know which choice has no electrical properties and provides security. On the list you can see a NIC, HDMI, and a USB port. All of those use some form of electrical energy, so they are out. We’ve used the 12v answer and we are left with the Cable lock which is correct because it is a security component.

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