Question: What is the difference between an Interface and an Abstract class?

Question: What is the purpose of garbage collection in Java, and when is it used?

Question: Describe synchronization in respect to multithreading.

Question: Explain different way of using thread?

Question: What are pass by reference and passby value?

Question: What is HashMap and Map?

Question: Difference between HashMap and HashTable?

Question: Difference between Vector and ArrayList?

Question: Difference between Swing and Awt?


Question: What is the difference between a constructor and a method?

Question: What is an Iterator?

Question: State the significance of public, private, protected, default modifiers
both singly and in combination and state the effect of package relationships on declared items qualified by these modifiers.

Question: What is an abstract class?

Question: What is static in java?

Question: What is final?