1. What is Java?
  2. What are the differences between C++ and Java?
  3. List the features of Java Programming language.
  4. What do you understand by Java virtual machine?
  5. What is the difference between JDK, JRE, and JVM?
  6. What is JIT compiler?
  7. What are Java Packages? What's the significance of packages?
  8. Can we declare a class as Abstract without having any abstract method?
  9. What's the difference between an Abstract Class and Interface in Java?
  10. How an object is serialized in java?
  11. When we should use serialization?
  12. When the constructor of a class is invoked?
  13. Is String a data type in java?
  14. Why Strings in Java are called as Immutable?
  15. What is multi-threading?
  16. Why Runnable Interface is used in Java?

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