What is the reason behind using constructors and destructors?
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What is local variable and instance variable?
Explain about sets?
What is a class reference?
How is garbage collection controlled?
aabccdee Find the used alphabets as abcde ?
When should I use abstract classes and when should I use interfaces?
jdbc drivers?
What is the difference between inner class and nested class?
How do you avoid global variables?
Should database connections be singleton?
What is io stream in java?
What is application system?