Question 41 :
What are the high-level thread states?
The high-level thread states are ready, running, waiting, and dead.
Question 42 :
What value does read() return when it has reached the end of a file?
The read() method returns -1 when it has reached the end of a file.
Question 43 :
Can a Byte object be cast to a double value?
No, an object cannot be cast to a primitive value.
Question 44 :
What is the difference between a static and a non-static inner class?
A non-static inner class may have object instances that are associated with instances of the class's outer class. A static inner class does not have any object instances.
Question 45 :
What is the difference between the String and StringBuffer classes?
String objects are constants. StringBuffer objects are not.