Java Trainee Interview Questions and Answers for Freshers

Collection is an interface that represents a group of objects while Collections is a utility class that provides methods to operate on collections.

• Collection is an interface while Collections is a class

• Collection is used to represent a group of objects while Collections provides utility methods to operate on collections

• Example of Collection: List, Set, Queue

• Example of Collections: sort(), reverse(), shuffle()

To find the second largest number in an array of integers.

• Sort the array in descending order and return the second element.

• Iterate through the array and keep track of the two largest numbers.

• Use a priority queue to find the second largest element.