- What are Classes.
- What are Objects.
- Different ways of creating an Object.
- Can we have a Private Constructor in a Java class.
- Why main() method in java is public static void.
- Multiple main() methods in a java class.
- What are Marker Interfaces and how are they different from normal Interfaces ?
- Overriding equals() method.
- What is the purpose of equals() method and when to use it.
- Contract between equals() and hashCode() methods.
- What is Method Overriding.
- What is Method Overloading.
- Purpose of Final keyword.
- What are static variables.
- What are static blocks.
- Can we override a static method.
- Why strings are mutable.
- Ways to iterate a Collection object.
- What are ClassNotFoundException and NoClassDefFoundError.
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