Java Interview Questions

Q1 Explain the difference between JDK, JRE, and JVM. ✓ Answered → Q2 What are the main features of Java? ✓ Answered → Q3 Explain OOP concepts in Java. ✓ Answered → Q4 What is the difference between abstract class and interface? ✓ Answered → Q5 What is method overloading and overriding? ✓ Answered → Q6 What is the difference between == and equals() in Java? ✓ Answered → Q7 Explain the concept of inheritance in Java. ✓ Answered → Q8 What is polymorphism in Java? ✓ Answered → Q9 What are access modifiers in Java? ✓ Answered → Q10 What is encapsulation and how is it achieved? ✓ Answered → Q11 Explain final keyword in Java. ✓ Answered → Q12 What is the difference between ArrayList and LinkedList? ✓ Answered → Q13 What is the difference between HashMap and Hashtable? ✓ Answered → Q14 Explain the Java Collections Framework. ✓ Answered → Q15 What is a Set in Java and its implementations? ✓ Answered → Q16 What is the difference between List and Set? ✓ Answered → Q17 What is a Thread in Java? ✓ Answered → Q18 What is the difference between Runnable and Thread? ✓ Answered → Q19 Explain synchronized keyword in Java. ✓ Answered → Q20 What is the difference between String, StringBuilder, and StringBuffer? ✓ Answered →