Java Interview Questions — a practical guide to Java interview questions with clear examples you can reuse in real projects.
Java Tutorial Series (88/90). Prefer one article? Read the complete Java tutorial.
Short description
Be ready to explain JVM/JDK, HashMap internals at a high level, equals/hashCode, and checked vs unchecked exceptions.
Sample Q&A
Q: == vs equals?
A: == compares references for objects; equals compares values when overridden.
Q: ArrayList vs LinkedList?
A: ArrayList better random access; LinkedList better some insert/remove patterns.
Q: Checked vs unchecked?
A: Checked must be handled/declared; unchecked are RuntimeException.