120.Autoboxing and unboxing

What is autoboxing and unboxing in Java?

• Converting data to a higher type
• Converting data to a lower type
• Converting between primitive and wrapper types
• Converting between classes and objects

What is an example of unboxing in Java?

• Integer to int
• int to Integer
• Double to double
• double to Double

What is the advantage of autoboxing and unboxing?

• Improved memory management
• Reduced code complexity
• Faster runtime performance
• Elimination of exceptions

What is unboxing in Java?

• Converting primitive to object
• Converting object to primitive
• Converting String to int
• Converting int to String

Why is autoboxing used?

• To improve memory usage
• To enhance code readability
• To speed up program execution
• To avoid runtime errors

What is the difference between boxing and unboxing wrapper class Java?

• Boxing converts primitive to object, unboxing converts object to primitive
• Boxing converts object to primitive, unboxing converts primitive to object
• Boxing and unboxing are the same process
• Boxing and unboxing are not related to wrapper classes

What is type wrapper in Java?

• A class that wraps exceptions
• A class that wraps primitive data types
• A class used for type casting
• A class used for exception handling

Why do we need wrapper class in Java?

• To improve memory usage
• To handle runtime exceptions
• To enable creation of custom exceptions
• To work with primitive data types as objects

Is Autoboxing bad for Java?

• Yes, it leads to memory leaks
• No, it simplifies code
• Yes, it causes compilation errors
• No, it slows down execution

What is the objective of unboxing?

• To convert an object to a string
• To convert a string to an object
• To convert a wrapper to a primitive
• To convert a primitive to a wrapper