Explain about oops concepts.
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Why does java not support operator overloading?
When we will use an Interface and Abstract class?
Write a regular expression to validate a password. A password must start with an alphabet and followed by alphanumeric characters; its length must be in between 8 to 20.
You're given a Boolean 2D matrix, can you find the number of islands?
What is a predicate method?
What is the argument type of main() method?
What is the difference between the file and randomaccessfile classes?
Can a class be a super class and a sub-class at the same time? Give example.
whats is inheritance?
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What is a parameter in simple terms?
Difference between ?System.out.println? and ?System.error.println??
How do I compare two strings in word in java?