Most of the questions will be generalized questions, such as,

"Why did you choose engineering?"
"Name a time where you have contributed towards a team and what your position was"
"How was your previous work before this? What did you do?"
"Why did you choose our company?"

Then there are sometimes harder ones such as,

"Our company believes in a diversified workforce, how do you think this would benefit our company?"
etc.

An example of a rare technical question would be,

"If the time is 3:45, what would the angle of the hour hand be?"

Shake hands when meeting them ("Nice to meet you"), you could shake hands after the interview when leaving ("Thank you").

I doubt they will ask you to show your skills, but if the position requires it, they will ask you if you've used it or how fluent you are with it.

Research in the company, get there 5 minutes early, don't be too nervous, keep good amount of eye contact, don't stare at them or at the wall. Make sure you've went to the washroom before the interview and drink a little bit of water. Have a copy of your resume, references, and a notepad with a pen. Ask questions to show you're interested after.

Answer questions with a good amount of detail. Should be about 1-2 minute answers so they can see what kind of person you are. Short answers won't allow them to get to know you, and long answers drag on too much. Try to give your own real examples when asked about things such as team work and such.

Try to look positive and confident.