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Technology problems
1. Why is the main() method declared static?
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Correct Answer: main() method is called by the JVM even before the instantiation of the class, hence it is declared as static
2. What is the return type of the main() method?
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Correct Answer: Main() method doesn't return anything hence declared void
3. What is the argument of main() method?
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Correct Answer: main() method accepts an array of String object as arguement
4. Can a main() method be declared final?
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Correct Answer: Yes Any inheriting class will not be able to have it's own default main() method
5. Does the order of public and static declaration matter in main() method?
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Correct Answer: No It doesn't matter but void should always come before main()
6. Can a source file contain more than one class declaration?
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Correct Answer: Yes a single source file can contain any number of Class declarations but only one of the class can be declared as public
7. Which package is imported by default?
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Correct Answer: javalang package is imported by default even without a package declaration
8. Can a class be declared as protected?
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Correct Answer: A class can't be declared as protected only methods can be declared as protected
9. What is the purpose of declaring a variable as final?
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Correct Answer: A final variable's value can't be changed final variables should be initialized before using them
10. I do not want my class to be inherited by any other class. What should i do?
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Correct Answer: You should declared your class as final But you can't define your class as final, if it is an abstract class A class declared as final can't be extended by any other class
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