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Questions and Answers
What is the main reason why static variables that are not constants should normally be private?
What is the main reason why static variables that are not constants should normally be private?
- To prevent any changes to the variables
- To make them accessible to all methods
- To increase their visibility in the class
- To restrict access to the variables (correct)
How is a static method different from a regular method?
How is a static method different from a regular method?
- A regular method is more efficient in memory usage
- A regular method can access instance variables directly
- A static method requires an instance of a class to be executed
- A static method can be invoked without creating an object (correct)
Why can't a static method reference an instance variable of a class?
Why can't a static method reference an instance variable of a class?
- Due to limitations in the Java programming language
- To prevent changes to the instance variables
- To enforce encapsulation of the class
- Because static methods don't have access to object-specific data (correct)
What happens if you try to invoke a non-static method from a static method directly?
What happens if you try to invoke a non-static method from a static method directly?
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In Java, how should a static method be invoked?
In Java, how should a static method be invoked?
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Which keyword is used to call a constructor in Java?
Which keyword is used to call a constructor in Java?
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What is the purpose of a constructor in Java?
What is the purpose of a constructor in Java?
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What does an empty set of parentheses in a constructor indicate in Java?
What does an empty set of parentheses in a constructor indicate in Java?
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What type of variables do static variables belong to in Java?
What type of variables do static variables belong to in Java?
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Can a constructor have a return type in Java?
Can a constructor have a return type in Java?
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What is the role of a static method in Java?
What is the role of a static method in Java?
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