Related InterviewSolutions

• How is WeakHashMap differs from other HashMap?
• How the ConcurrentHashMap works, how it provides the thread safety?
• What is CopyOnWriteArrayList?  How it is different from ArrayList in Java?
• When to use the Queue and Stack? What is the possible use case?
• When to use the Iterator and Enumeration? What is the possible use case?
• How can you use Comparable and Comparator interfaces to sort collections?
• What is the situation in which fail-fast and fail-safe iterators works? What are the issues to use the fail-safe along with the example?
• What is the purpose of the initial capacity and load factor parameters of a HashMap? What are their default values? How is the threshold plays the role to decide the size?
• What is the time complexity of putting and getting an element from such structure? Which Map implementation provide better performance?
• What is collision problem? How HashMap performs collision detection and collision prevention when the index position found for the same key, what are the algorithms performed to avoid this situation?