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Explain The different kinds of exceptions ?
Checked Exceptions : Environmental error in which cannot necessarily be detected through testing; e.g. broken socket, disk full, database unavailable, etc.
Errors : Virtual machine error: class not found, out of memory, no such method, illegal access to private field, etc.
Runtime Exceptions : Programming errors in which should be detected in testing: index out of bounds, null pointer, illegal argument, etc.
Checked exceptions must be handled at compile time. Runtime exceptions do not required to be. Errors frequent cannot be.
While you declare a variable in a function, the variable can be accessed within that function only. While you exit the function, the variable is destroyed. These variables are ca
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Explain about the Static classes A class can have static variables and methods. Static methods and variables are associated with class itself an
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Authentication is basically an identification step. Functionality used for J2EE security: Principal : An entity that may be authenticated and identified. Principal n
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