What is the best solution to fix slow disk performance?
Add more RAM.
[Slow disk performance is often a bottleneck for modern computer systems. In this case the best solution may be to add more RAM.]
Which of these would NOT cause any issues with the Power On Self-Test (POST)?
The Power Good signal successfully being sent to the CPU
[Even though the fans may be receiving power, there may be a fault that is preventing the Power Good signal from being sent to the CPU, which would prevent the POST from running.]
What needs to be available to be able to ping DNS names?
A DNS server
[You can ping DNS names (ping comptia.org for example) or FQDNs (ping sales.comptia.org for instance). However, this will not work if a DNS server is not available.]
What could a loud noise coming from a computer fan indicate?
There is a driver problem.
[A fan that sounds noisy may be spinning too fast because its driver software is not controlling it properly.]
What is true about identifying the cause of a problem?
You must balance being methodical with being efficient.
[In the real world, you often must balance being methodical (so that possible causes are not overlooked) with being efficient (so that the problem can be solved quickly).]