How many locks does an object have? : Questions « Thread « SCJP

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SCJP » Thread » Questions 
7.12.9.How many locks does an object have?
A.      One
   B.      One for each method
   C.      One for each synchronized method
7.12.Questions
7.12.1.The wait() and notify() methods can be called outside synchronized code(True/False).
7.12.2.Answer: wait and notify
7.12.3.You can specify which thread should be notified in a notify() method call(True/False).
7.12.4.Answer: notify target
7.12.5.Calling wait() moved the thread to the monitor's pool of waiting threads(True/False).
7.12.6.Answer: wait method
7.12.7.Which the following may not be synchronized code?
7.12.8.Answer: synchronized class block
7.12.9.How many locks does an object have?
7.12.10.Answer: object lock
7.12.11.When an application begins running, there is one daemon thread, which runs main() method(True/False).
7.12.12.Answer: daemon thread
7.12.13.When an application begins running, a non-daemon thread runs main() method.
7.12.14.Answer: daemon thread and main
7.12.15.A thread created by a daemon thread is also a daemon thread.
7.12.16.Answer: daemon thread and its child thread
7.12.17.A thread created by a non-daemon thread is initially also a non-daemon thread.
7.12.18.Answer: created by daemon thread
7.12.19.The JVM runs until there is only one daemon thread(True/False).
7.12.20.Answer: daemon thread and exit
7.12.21.The JVM runs until there are no daemon threads(True/False).
7.12.22.Answer: JVM and daemon thread
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