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Are arrays passed by reference in java?
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Explain about complier design(phases)
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What are the pillars of java?
I have an HashMap object, which has with key and value pair. It has 10 keys and values in that object. Now the question is I want insert new key and value in middle or any where in that list but not at the end or at the top. Is it possible or not. If yes how can we achieve this one?
How do you reverse a string in java?
What is a finally block?
Define how can we find the actual size of an object on the heap?
What is the benefit of abstract class?
What is meant by packages?
What is the range of the char type?
What are different access specifiers in java?
how a programmer confirms that the data submitted has been succesfully inserted into the database(either oracle or my sql).. How a programmer confirm if there is any problem with the program he wrote for insertion... ANS:--- >executeupdate method is having boolean return type, if anything goes wrong in data insertion or data updation, it would return false. otherwise, if it successfully inserts data into the database, it would return true NOW HOW TO I CHECK IN MY DURING EXECUTION WHETHER IT RETURNS TRUE OR FALSE... WELL IT WILL DISPLAY ANY MESSAGE OR NOT
How do you access command-line arguments within the code?
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Core Java 
