Pergunta de entrevista da empresa EPAM Systems

Internal implementation of LinkedHashMap? Internal implementation of PriorityQueue? Class level locking and object level locking? Can we invoke the terminated collection? Facade design pattern? Liskov substitution principle? Heap data structure? Doubly linkedlist datastructure implementation? [1,3,5,7,8,9], targetSum=13, output=[2,4] indexes of the elements that match the target sum. Find a second non-repeated character from the given string?