I received a call from HR to schedule interviews.

They conducted two technical rounds (TR) and one managerial round (MR). Following this, a salary discussion took place over the phone with HR.

She mentioned she would try to get my offer approved, as I stated I was seeking an offer greater than my previous ones, which is understandable.

However, I never received another call from her, leaving me disappointed. They wasted both my time and their own.

Re-entrant lock

How to increase heap memory in Java: -Xms256m -Xmx2014m

Is a JAR file enough for client deployment? I said JRE should be installed, and then the JAR.

How to override equals(): public boolean equals(Object o) {}

Working of HashMap

Is ConcurrentHashMap thread-safe?

Is Singleton thread-safe?

How to convert an array to an ArrayList? Arrays.asList()

Can we override a static method?

How to remove an element from a Set? mySet.remove(Object)

How to count the number of words present in a String? Used HashSet implementation.

What is a race condition? Multithreaded operations.

What is context switching? It is used in threads to retain its state when a thread moves to a runnable state after getting execution time for a few seconds.

Simple join in two tables

Null insertion in TreeSet or TreeMap: For the first time, we can add it as the first element. After that, we'll get an NPE because sorting requires comparing two objects.

Null insertion in HashMap: In the 0th bucket.

Daemon Thread

Thread Executor Framework

Difference between Collections and Collection

Implicit objects of JSP

What is the Future class?