Which is the class in java?
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Why do we need data serialization?
Is java util regex pattern thread safe?
What will happen inside init() in servlet. my interviewer asked servlet lifecycle. i said "once servlet is loaded in to memory init() will be called which performs servlet initialization " . Again interview asked what values will be initialized . what is difference between init() and init(ServletConfig config).
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What do you mean by constant time complexity?
Can final class have constructor?
What is the difference between state-based unit testing and interaction-based unit testing?
how to fing linkedlist is circular or not?
Explain the importance of import keyword in java?
What does g mean in regex?
What is the method overriding?
What are "class access modifiers" in Java?
How can we find size of the object ?