PhiStream Consulting Interview Questions, Process, and Tips

A collection is a group of objects that can be stored, manipulated, and retrieved as a single unit.

• Concrete classes of collection include ArrayList, LinkedList, HashSet, and TreeSet.

• HashMap is a concrete class of the Map interface, which is a type of collection that stores key-value pairs.

• Other classes and interfaces in the collection framework include Queue, Stack, Vector, and Collection.

Quality of fuels is crucial for safe and efficient operation of equipment and vehicles.

• Fuel quality affects engine performance and emissions

• Contaminants in fuel can cause damage to equipment

• Fuel testing and analysis is important to ensure compliance with regulations

• Examples of fuel quality parameters include octane rating, cetane number, sulfur content, and viscosity