what is meant by abstract class?
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What modifiers are allowed for methods in an interface?
Which category the java thread do fall in?
How do you implement singleton class?
Is char a data type in java?
What are java packages?
How transient variable is different from volatile variable?
Difference between ‘is-a’ and ‘has-a’ relationship in java?
What are the advantages of assembly language?
What is string data type?
What is fail fast in java?
How is the marker interface used in Java?
Explain how hashmap works?