There is alot of confusion on the types of fire. This is a result of the difference between the American and the British standards. The major difference is that in American standards class B are fires in liquids abd gassec abd class C is electrical fire. According to British standard Class B is fire in liquids, Class C is fire in gasses and electrical fire are not considered as a fire type.
The most important part of an interview is the introduction. If you can make a good first impression you have already passed 50% of the interview. Dressing appropriately for an interview also as important. Next comes communication and then how much knowledge you have of doing the job you have applied for.