Questions

What is java
What is encapsulation?
What is abstract class?
What is inheritance and what are its types?
Why multiple inheritances is not supported in java?
Difference between metaspace and permagen
Explain lifecycle of a thread?
Can you start a thread which is already started?
What exception would arrive if we start a thread again?
What is an exception in java
Difference between string builder and string buffer in java
What do you mean by exception handling?
Difference between Exception and Error?
How to handle an Exception in java?
What is string class in java?
Difference between == and equals()?
How to make a class immutable?
What is serialization.
How to make a class serialized?
What is byte stream?