Explain about abstraction?
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What is the practical implementation of inner classes?
Can a class implement two interfaces having default method with same name and signature?
Can a class in java be inherited from more than one class?
What are sealed modifiers?
What does the “abstract” keyword mean in front of a method? A class?
What is the difference between public, private and protected access modifiers?
What are manipulators?
What is serialization? How do we implement serialization actually?
What is diamond inheritance problem? How java 8 solves this problem?
Explain about instance in object oriented programming?
Why does java not support multiple inheritance?
What is the base type from which all structs inherit directly?