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Is java a compiler?
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what is meant by package in java?
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What are predefined functions?
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Difference between abtsract & final
What happens when you add a double value to a string?
2) Suppose there are 5 directories having lot of files (say txt files) in each directory. 2 things :- 2.1) You want to search for filenames which have a particular pattern. 2.2) Out of these filtered files you want to search for a particular keyword or a search string. How can you achieve this?
What is the size of string?
State the difference between creating string as new () and literal.
What is formatted output in java?
What is math exp in java?
What is a native method?
Core Java 
