Hello
I am trying some interview questions that my friends were asked. and Im not sure what the answer to those question , can anyone help ?
1. why AC is better then DC?
2. how Bluetooth works?
3. how GPS works?
Thanks

 

For the first question, AC is not always better than DC. If you get asked that question, the interviewer probably wants to see how you reason. and/or what you would do to find the answer.

While on the subject of thinking, I suspect Wikipedia has answers to the last two questions. For GPS, you may be asked how relativity affects it.