Complete Java SE 8 Developer Bootcamp - String Objects

The video tutorial discusses the importance of strings in Java, highlighting their unique behavior as objects. It explains string creation, instantiation, and the use of literals. The concept of the string pool is introduced to illustrate memory management. The tutorial also differentiates between empty strings and null, emphasizing their distinct characteristics.

What is the primary reason strings are considered special in Java?

• They are the only objects that can be indexed.

• They have a unique memory management system.

• They are the most frequently used objects.

• They can be converted to integers directly.

How are characters within a string indexed in Java?

• Starting from the end of the string

• Starting from -1

• Starting from 0

• Starting from 1

What happens when you create a string using the 'new' keyword?

• It creates a string object only if it doesn't exist.

• It always creates a new string object on the heap.

• It creates a string object in the stack memory.

• It reuses an existing string object if available.

What is the benefit of using string literals in Java?

• They allow for faster execution.

• They reduce memory usage by reusing objects.

• They automatically convert to integers.

• They are stored in the stack memory.

What is the difference between an empty string and a null string in Java?

• Empty strings cannot be instantiated.

• Null strings are faster to process.

• Both are the same and can be used interchangeably.

• An empty string is a valid object, while null is not.

What is the purpose of the string pool in Java?

• To store strings temporarily during execution.

• To convert strings to character arrays.

• To store all string objects in the stack.

• To manage memory by reusing string literals.

What happens if two string variables point to the same string in the pool and one changes the string?

• Both variables will point to null.

• A new string object is created for the changed string.

• The change is not allowed and throws an error.

• The other variable will see the change.