What is substring of a string?
What do you understand by the term wrapper classes?
What is default switch case? Give example.
What is singleton class in java and how can we make a class singleton?
Is singleton a bad practice?
Explain the concept of hashtables?
What is static synchronization?
Why would you desing a J2EE application so user data is entered by way of a JSP page and managed by an underlying Java Beans class?
diff b/w sleep(1000) and wait(1000)?
What is the difference between arraylist and hashset in java?
What are the states of thread in java?
What is difference between static method and static variable?
What is void keyword?