What are the rules to define a functional interface?
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What is multiple inheritance? How java 8 supports multiple inheritance?
Explain about polymorphism?
Explain about instance in object oriented programming?
What is the default access specifier in a class definition?
What interface must an object implement before it can be written to a stream as an object?
What are the access modifiers?
What is the main use of message metaphor in object-oriented programming?
How to achieve data abstraction?
What are the different principle of OOPS?
Do structs support inheritance?
Whether static method can use nonstatic members?
What are extrinsic and intrinsic connections in object-oriented programming?