Complete Java SE 8 Developer Bootcamp - Passing By Value: Objects

The video tutorial explains how method invocation works by passing an object reference, creating a new stack frame, and performing operations on the heap. It demonstrates the process using a 'debit fee' method, showing how references are copied and how changes affect the heap. The tutorial also covers string immutability, illustrating how changes to strings create new objects rather than modifying existing ones, using a 'salutation' method as an example.

What happens when an object reference is passed to a method?

• A copy of the object is passed.

• The method cannot access the object.

• The original object is modified directly.

• A new object is created.

In the context of method invocation, what does the stack frame contain?

• The entire program's data.

• The method's return value.

• A reference to the object.

• The actual object data.

How does the heap play a role when a method modifies an object?

• It stores temporary variables.

• It holds the method's local variables.

• It reflects changes made to the object.

• It prevents any changes to the object.

What is a key characteristic of strings in Java?

• They are immutable.

• They are mutable.

• They cannot be passed to methods.

• They are stored in the stack.

What happens when a string is modified in a method?

• The string becomes mutable.

• A new string is created.

• The method throws an error.

• The original string is changed.