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| 61. | 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. |
| 62. | Can a Byte object be cast to a double value? |
No, an object cannot be cast to a primitive value. |
| 63. | 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. |
| 64. | What is an object's lock and which object's have locks? |
An object's lock is a mechanism that is used by multiple threads to obtain synchronized access to the object. A thread may execute a synchronized method of an object only after it has acquired the object's lock. All objects and classes have locks. A class's lock is acquired on the class's Class object. |
| 65. | What is the % operator? |
It is referred to as the modulo or remainder operator. It returns the remainder of dividing the first operand by the second operand. |
