According to the Employment Protection Act (LAS), the notice period is at least one month, both on the part of the employer and the employee. Collective agreements often have a longer notice period depending on age and length of employment.

Yes, but then you must have factual reasons and be able to prove that the person misbehaved in a serious way. You must also conduct an investigation to see if it is possible to redeploy the person and avoid a dismissal.

Just like with regular vacation, the employee can apply for vacation during the notice period. Otherwise, the employee is entitled to vacation allowance. The vacation days you pay compensation for are the previously saved vacation days, those not taken in the current vacation year and those earned by the employee for the upcoming vacation year.