Java Interview Questions: – 25 Basics interview questions on Java?

• What if the main method is declared as private?
• What if the static modifier is removed from the signature of the main method?
• Can we define private and protected modifiers for variables in interfaces?
• Can there be an abstract class with no abstract methods in it?
• What modifiers are allowed for methods in an Interface?
• What is a local, member and a class variable?
• What does it mean that a method or field is “static”?
• Is null a keyword?
• What modifiers may be used with an inner class that is a member of an outer class?
• What is class path?
• What is path?
• What is the difference among JVM Spec, JVM Implementation, JVM Runtime?
• What are JDK and JRE?
• What is JIT?
• What is a JVM heap?
• What is sandbox?
• What is Locale?
• What is a ResourceBundle class?
• How will you get the platform dependent values like line separator, path separator, etc?
• How does garbage collector decide which objects are to be removed? Can garbage collector be forced?
• What is the final keyword denotes w.r.t class, method and variable?
• What are the methods in Object?
• Can you instantiate the Math class?
• What is the difference between the instanceof and get class, these two are same or not?
• Can main method be declared final?

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21 important Java/J2EE interview questions

21 important Java/J2EE interview questions: –

This following part will cover the most asked Java/J2EE interview questions during Java/J2EE interview.

So have a look on the same and do revise it when ever you go for the Java/J2EE interview questions interview.

Normally the Java’s interviewer starts with…..

• What is the difference among JVM Spec, JVM Implementation, JVM Runtime?

• What are JDK and JRE?

• What is JIT?

• What is a JVM heap?

• What is sandbox?

• What is Locale?

• What is a ResourceBundle class?

• How will you get the platform dependent values like line separator, path separator?

• How does garbage collector decide which objects are to be removed? Can garbage collector be forced?

• What is the final keyword denotes w.r.t class, method and variable?

• What are the methods in Object?

• Can you instantiate the Math class?

• What is the difference between the instanceof and getclass, these two are same or not?

• Can main method be declared final?

• What is a native method?

• Does Java provide any construct to find out the size of an object?

• Is Empty .java file a valid source file?

• Can a .java file contain more than one java classes?

• What is the difference between an argument and a parameter?

• What are the different scopes for Java variables?

• What are wrapper classes?

Also see the following video on on FlyWeight Pattern which will help you to boost your interview preparation: –

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