What are the differences between string and stringbuffer?
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Difference between method overloading and method overriding in java ?
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What is the use of 'super' keyword inside a constructor?
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If all the methods in abstract class are declared as abstract then what is difference between abstract class and in interface?
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What's the default access specifier for variables and methods of a class?
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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